Sanyo Laser Databook Schematic

What is Laser Diode

The term laser is an acronym that stands for "Light Amplification by Stimulated Emission of
Radiation".
SANYO laser diode structure and basic element structure are listed below.

Laser diode structure

Can type

Cavity length

Window

Cap

Heatsink

Laser chip

PIN photodiode

Stem

PIN photodiode

Laser chip

Element structure

Electrode

Cap layer

Current blocking layer

Cladding layer

Active layer(MQW structure) *

Cladding layer

Substrate(Misoriented substrate)

Electrode

plastics

Heat radiation fin

Frame type

*MQW : Multiple Quantum Well

SANYO Laser Diodes Support Advanced Information Society

SANYO currently markets AlGaAs infrared laser diodes in the 780 – 830 nm wavelength, as well
as AlGaInP based red laser diodes in the 635 – 675 nm wavelength. SANYO realized 635 nm
AlGaInP laser diode for the first time in the world. The low operating current and high operating
temperature are realized by using misoriented substrate and MQW (Strain compensated) active
layer. With unique structures developed by SANYO, providing the following features, these laser
diodes are highly rated in a broad range of applications including compact discs, CD-R/RW, DVD
systems, bar code scanners, laser pointers and printers. SANYO laser diodes are also compatible
with multimedia and other new optical equipment on which advanced information societies in
future depend.

• A full line-up includes index guided short-wavelength, low-noise, high output power

• Long life and high reliability

• A stabilized fundamental transverse mode

• 9 mm, 5.6 mm diameter packages and frame type

• Pin connections compatible with various power supply systems

1

Red Laser Diode

SANYO Red laser diode line-up

70

30

20

10

7

5

Output Power Po (mW)

3

DL-LS1035

*

DL-4038-

26

DL-4038- 31
DL-4038-021
DL-4148- 21

DL-3038-033/ 34
DL-3148- 33/ 34
DL-3038-013
DL-3148- 13

DL-3038-023
DL-3148- 23

635 650 670

DL-5147-041

DL-4147- 61

DVD-P/ROM

DL-3147- 65
DL-3147- 85
DL-3247- 65

DVD Frame Laser

NEW

DL-3107-165

DL-3147- 31
DL-3147-021

DVD-R/RW

DL-LS1027

*

655 675660

2 Beam (LBP)

DL-LS1018

*

DL-4039-011

DL-3039-011
DL-3149- 57

NEW

New product

Under development

*

Lasing Wavelength p (nm)

Summary of Features (Typ.

Absolute

Maximum Ratings

Light

Po

mW

7
3

5
10
10
25
35

7
12

3

5

5

7

7

7

7
12

7
30
50

5

7
10

Operating

Temperature

Topr

°C

–

+40

10 to

–

+40

10 to

–

+50

10 to

–

+40

10 to

–

+50

10 to

–

+40

10 to

–

+40

10 to

–

+40

10 to

–

+40

10 to

–

+40

10 to

–

+50

10 to

–

+40

10 to

–

+50

10 to

–

+70

10 to

–

+80

10 to

–

+70

10 to

–

+70

10 to

–

+70

10 to

–

+60

10 to

–

+70

10 to

–

+60

10 to

–

+60

10 to

–

+50

10 to

–

+60

10 to

Part No. Main Feature

DL-3038-013
DL-3038-023
DL-3038-033/ 34
DL-4038-021
DL-4038- 31
DL-4038- 26
DL-LS1035

*

DL-3148- 13
DL-4148- 21
DL-3148- 23
DL-3148- 33/ 34
DL-3147-021
DL-3147- 31
DL-3147- 65
DL-3147- 85
DL-3247- 65
DL-4147- 61

NEW

DL-3107-165
DL-5147-041
DL-LS1027

*

DL-3039-011
DL-3149- 57
DL-4039-011
DL-LS1018

*

Under development

*

5mW at 40°C
3mW at 40°C

5mW at 50°C
10mW at 40°C
10mW at 50°C
20mW at 40°C
30mW at 40°C

5mW at 40°C
10mW at 40°C

3mW at 40°C

5mW at 50°C

5mW at 40°C

5mW at 50°C

5mW at 70°C

5mW at 80°C

5mW at 70°C
10mW at 70°C

5mW at 70°C
30mW at 60°C
70mW at 70°C

5mW at 60°C

5mW at 60°C
10mW at 50°C

10mW ,2Beam

Output

10x2

)

Ratings

Po

5
3

5
10
10
20
30

5
10

3

5

5

5

5

5

5
10

5
30
50

5

5
10
10

Electro-Optical Characteristics

Threshold

Current

Ith

mA

30
20
30
35
35
40
50
30
40
20
40
30
25
25
25
25
30
20
45
45
30
25
40
40

Operating

Current

lop

mA nm ° °mW

45
25
40
55
55
70
90
45
60
25
55
45
35
35
35
35
50
30
80

110

45
40
60
60

Lasing

Wavelength

635

650

655

660

670

675

Monitor
Current

lm

mA

0.20

0.20

0.20

0.15

0.15

0.20

0.30

0.20

0.15

0.15

0.20

0.40

0.20

0.20

0.20

0.20

0.30

0.10

0.03
–

1.20

1.50

0.15

0.15

Beam Divergence

Parallel

***

Perpendicular

8.0

8.0

8.0

8.0

8.0

7.0

7.0

8.0

8.0

8.0

8.0

7.5

8.0

8.0

8.0

8.0

8.0

8.0

7.0

8.5

8.0

8.0

8.0

8.0

30
30
30
30
30
28
30
30
30
30
30
30
30
30
30
30
28
30
23
17
33
30
30
30

Tc = 25°C

Package

Dimension

Type

B
B
B
B
B
B
B
C
C
C
C
C
C
C
C
D
C

I
C
C
B
C
C
E

Pin

Connection

Type

I

I

I, III

I

I, III

I, III

I

I, III

I, III

I, III

I, III

I

I, III

I, II, III

I, II, III

I, II, III

I, II, III

II

I

IV

I

I, III

I

V

2

Infrared Laser Diode

SANYO Infrared laser diode line-up

CD-R/RW

150

120

100

80

20

15

NEW

DL-7140-201K

*

DL-7140-201H

*

DL-7140-201S

*

DL-7240-201S

*

DL-4140-001S

2 Beam (LBP)

DL-LS2003

DL-8032-001

DL-7032-001

10

5

Output Power Po (mW)

DL-4034-154S

DL-3144-005S

Frame laser (CD-P/ROM)

DL-LS3004

NEW

DL-3150-133

*

Frame laser (CD-P/ROM)

DL-3150-103/105

3

DL-3144-007S

DL-3150-106/107

NEW

DL-3180-121
DL-LS3007

*

785 790 830

Lasing Wavelength p (nm)

Summary of Features (Typ.

Absolute

Maximum Ratings

Light

Po

mW

8

5

15

15x2

25

80

80

80

80

5

5

5

5

7

7

100

150

Operating

Temperature

Topr

°C

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +70

–

10 to +60

–

10 to +60

–

10 to +60

–

10 to +70

–

10 to +70

–

10 to +50

–

10 to +50

Part No. Main Feature

DL-3144-005S

DL-3144-007S

DL-4034-154S

DL-LS2003

*

DL-4140-001S

DL-7140-201S

DL-7240-201S

DL-7140-201H

NEW

DL-7140-201K

DL-3150-103/105

DL-3150-106/107

DL-3180-121

NEW

DL-LS3007

*

DL-LS3004

*

NEW

DL-3150-133

DL-7032-001

DL-8032-001

at the power of ratings Export control-regulations products Under development

*

Low droop

Low droop

10mW at 60°C

15mW 2Beam

20mW at 60°C

85mW(Pulse)

85mW(Pulse)

120mW(Pulse)

150mW(Pulse)

Frame Laser

Frame Laser

Frame Laser, Low current

Frame Laser, Low current

Frame Laser, 5mW

Frame Laser, 5mW

100mW at 50

150mW at 50

Output

°C

°C

)

Ratings

Po

5

3

10

15

20

70

70

70

70

3

3

3

3

5

5

100

150

Electro-Optical Characteristics

Current

Ith

mA

25

25

30

30

25

30

30

30

30

35

35

20

20

20

20

50

50

Operating

Current

lop

mA nm ° °mW

45

35

60

55

60

100

100

100

100

45

45

25

25

30

30

140

185

Threshold

*

Lasing

Wavelength

Monitor
Current

785

790

830

lm

mA

4.50

0.60

0.40

0.40

0.75

0.25

—

—

—

0.20

0.20

0.20

0.20

0.30

0.30

0.20

0.50

***

Parallel

Export control-regulations
products

Under development

*

New product

NEW

Pulse condition

*

Beam Divergence

Perpendicular

9.0

25

9.0

27

9.0

28

8.0

25

9.0

25

8.0

17

8.0

17

8.5

17

8.5

17

10.5

10.5

11.0

11.0

10.5

10.5

7.0

7.0

35

35

35

35

35

35

18

18

Tc = 25°C

Package

Dimension

Type

C

C

A

E

C

C

D

C

C

G/F

F/G

H

G

H

G

A

A

Pin

Connection

Type

I

I

II

V

I

III

IV

IV

IV

II

II

II

II

II

II

I

I

3

Photograph

Can Type Laser Diodes

A

DL-8032
DL-7032
DL-4034

B C D E

DL-4039
DL-4038
DL-3039
DL-3038

DL-7140
DL-5147
DL-4148
DL-4147
DL-4140

DL-3149
DL-3148
DL-3147
DL-3144

DL-3247
DL-7240

DL-LS2003

*

DL-LS1018

*

ø9.0mm (Infrared) ø9.0mm (Red) D-shaped stem ø5.6mm (2 Beam)

ø5.6mm

Under development

*

Frame Type Laser Diodes

F G H I

DL-3150-103

DL-3150-107
DL-3150-105
DL-3150-106

DL-3150-133

*

DL-LS3007

DL-LS3004

*

DL-3180-121

DL-3107-165

*

Frame type (CD) Frame type (CD) Small frame type (CD) Frame type (DVD)

Under development

*

4

Application

Application

Examples of Applied Systems

Applications Products

Laser Pointer

Point of guide
(Meeting, Exhibition
Sightseeing etc.)

Line Marker, Leveler

Reference for
construction
(For Parallel line,
For measurement
distance)

Bar-code Scanner

Merchandise control

DL-3038-013
DL-3038-023
DL-3147-021
DL-3148- 13
DL-3148- 23

DL-4038-021

DL-4038- 26

DL-3038- 33/-034

DL-3038- 33/-034
DL-3039-011
DL-3147- 31
DL-3148- 33/- 34
DL-3149- 57
DL-4038- 31

DL-4038- 31

DL-4148- 21

DL-LS1035

DL-4039-011
DL-4147- 61
DL-5147-041
DL-LS1035

DVD, DVD-R/RW

DVD

Laser
Beam
Printer

CD, CD-ROM, CD-R/RW

CD-R/RW

Optical Communication

Digital Versatile Disc
(DVD)-ROM, R/RW
Drive

Image printing
Word printing

Compact Disc(CD),

-ROM,R/RW Drive

Optical Communication

DVD DVD-R/RW

DL-3107-165
DL-3147- 65
DL-3147- 85
DL-3247- 65
DL-4147- 61

Red Laser Infrarde Laser

DL-3039-011
DL-3149- 57
DL-4039-011
DL-LS1018

CD, CD-ROM CD-R/RW

DL-3150-103/105
DL-3150-106/107
DL-3180-121
DL-3150-133
DL-LS3004
DL-LS3007

DL-7140-201S

DL-8032-001

DL-LS1027

DL-3144-005S
DL-3144-007S
DL-4034-154S
DL-LS2003
DL-4140-001S

DL-7140-201S
DL-7240-201S
DL-7140-201H
DL-7140-201K

DL-7032-001

5

Key Technology

Strain compensated - MQW active layer

650~670nm Laser Diode

*

635nm Laser Diode (except DL-LS1035)

*

Quantum-barrier

Quantum-well

Quantum-barrier

Substrate

Quantum-well Tensile strain

Tensile strain

Compressive strain

Tensile strain

Compressive strainQuantum-barrier

Misoriented Substrate

[100]

[011]

[011]

Compressive strainQuantum-barrier

Substrate

Conventional Substrate

Misoriented Substrate

6

Part Number Coding and Pin connection

Part Number Coding

DL-3 03 8-0 13

Laser diode series

Light output

Max.(mW)
3 :
4 :
5 :
6 :
7 :
8 :

7
20
40
50

100
150

Package dimension (mm)
03 : ø9.0
10 : Frame type(DVD)
14 : ø5.6
15 : Frame type(CD)
18 :

Small frame type(CD)

24 : D-shaped stem

Lasing wavelength (nm)
0 : 785–790
1 : 810
2 : 830
3 : 870
4 : 780
7 : 650–655
8 : 635
9 : 670–675

Pin connection

I II III

1 3

1 3

Suffix No.

Pin connection
0 : P-side down

(– power supply system)
1 : N-side down
(2 power supply systems)
2 : N-side down
(+ power supply system)

1 3

LD PD

2

– power supply system

IV

1 3 (NC)

LD

2

+ power supply system

no PD

LD PD

2

2 power supply system

V

1 3

LD1 LD2PD

2 beam + power supply system

2

4

LD PD

2

+ power supply system

7

External appearance

External appearance dimensions

A CB

0

ø9.0–0.03

ø5.35

ø4.75±0.15

Effective window diameter 2.0min.

ø3.0

Effective window diameter 1.0min.

0

ø9.0–0.03

ø5.35

ø4.75±0.15

ø2.1

Tolerance : ±0.2
Unit : mm

0

ø5.6–0.025

ø4.4

ø3.55±0.1

Effective window diameter 1.0min.

ø1.6

1

3

1.0±0.1

LD facet

ø1.4max.

3–ø0.45±0.1

ø2.54

Top view

0.45±0.1

1.5±0.1

5.0±0.3

10±1.0

2.45±0.150.5max.

Pin No.

2

0.3

1 2 3

D E

0

ø5.6–0.025

ø4.4

ø3.55

Effective window diameter 0.6min.

ø1.6

2.45±0.150.5max.

Pin No.

1 3

2

0.3

1 2 3

Top view

1.0±0.1

0.45±0.1

LD facet

1.5±0.1

ø1.4max.

3–ø0.45±0.1

ø2.54

ø9.0mm stem (Red)

0

ø5.6–0.025

ø4.4

ø3.55±0.1

Effective window diameter 1.0min.

ø1.6

5.0±0.3

10±1.0

1.27±0.08

0.5max.

Pin No.

5.6mm ø stemø9.0mm stem (Infrared)

1 3

0.25

1 2 3

2

1.0±0.1

Top view

LD facet

ø1.4max.

3–ø0.45±0.1

ø2.0

0.4±0.1

1.2±0.1

3.5±0.5

6.5±1.0

2

1.270.5max.

Pin No.

1 3

4

1.0±0.1

1 4 3

Top view

LD facet

ø1.4max.

3–ø0.45±0.1

ø2.0

0.4±0.1

1.2±0.1

3.5±0.5

6.5±1.0

1.7±0.05

1.2

1.27±0.08

0.5max.

Pin No.

0.25

1 2 3

1.0±0.1

ø1.4max.

3–ø0.45±0.1

ø2.0

Top view

LD facet

0.4±0.1

1.2±0.1

3.5±0.5

6.5±1.0

D-shaped stem ø5.6mm stem (2 Beam)

8

External appearance dimensions

F G

Tolerance : ±0.2
Unit : mm

1.9

3.4 1.85.0±0.5

0.7

0.7±0.12

R0.7

+0.1

0

1.4±0.12

3.0±0.1

6.4

2–0.4

3– 0.4±0.1
(

)

1.6

Pin No.

3.2

1.6

0

8.0

–0.1

4.0±0.12

3.7±0.15 3.0±0.15

4.2

3 2 1

2–C0.5

LD facet

2–R0.5

1.0

0.7

0.7±0.12

1.9

2–R0.7

3.4±0.12

3.7±0.15

+

0

1.4±0.12

3.4 1.85.0±0.5

3.0±0.1

6.4

2–0.4

3– 0.4±0.1
(

1.6

Pin No.

0.1

)

3 2 1

+0.1

0

0

+0.1

1.4

2

–

5

±

1

°

Frame type (CD) Frame type (CD)

6.8

1.6

4.2

3.2

0
–0.1

2–C0.5

LD facet

2

–

3

0

°

1.0

2

–

5

±

1

°

H I

0.21

1.41

0.2

2-0.3

2.0±0.15

0.5

1.75

1.37

1.75

4.0±0.1

2.87

3 2 1

ø3.3

0.6±0.15

LD facet

2-30

°

3.0

2.55

3.505.0±0.5

1.0

3-0.3
2-1.0 0.3

0.8

2.8

0.75±0.15

Pin No.

0.40.6

6.5 0.6

4.3

2-0.6

3.2

3-0.6

4.2

3.2

1.6

4.0

4.6

6.8±0.1

2.8

2 13

2-30

LD facet

0.9

°±

1°

2.4

0.8

2-5

°±

1°

1.4

5.5

1.0

2.9

0.6

Frame type (CD) Frame type (DVD)

9

Definition of Feature

Absolute maximum ratings

Absolute maximum ratings are levels that can not be exceeded even momentarily
under any external conditions. The levels are stipulated in terms of case tempera
ture Tc = 25°C.

1. Light output power (PO)

This is maximum allowable output during
continuous operation. In the drive current
light output characteristics shown in the
figure on the right, there are no kinks or
bends under this light output power.

2. Reverse voltage (VR)

This is maximum allowable voltage with a

Output power P

reverse bias applied to the element. The
level is stipulated separately for a laser
diode and a photodiode.

3. Ambient operating temperature (Topr)

This is the maximum ambient temperature
in which the element can operate. The level is defined by case temperature of the
element.

Max. rating power

PO

Kink power

Forward current IF

Output power vs. Forward current (P–IF)

Non-linear

Kink

4. Ambient storage temperature (Tstg)

This is the maximum ambient temperature for element storage.

Electric optical characteristics

1. Threshold current (Ith)

Although P–IF curve distinguishes the LED
light emitting region A from the laser
oscillating region B, the current level that
triggers laser oscillating is the threshold
current. In actuality, Ith is defined as the
point where the straight line in B intersects
the X axis.

2. Rated light output power (Po)

This is recommended light output power
during continuous operation.

3. Operating current (Iop)

This is a current in the forward direction
that is required to generate rated light output power.

PO

Output power P

Output power vs. Forward current (P–IF)

LED

emitting region

B

A

Forward current IF

Laser
oscillating
region

lopIth

4. Monitor current (Im)

This is an output current of the photodiode at rated light output power.

10

5. Differential efficiency (dP/dIop)

This is the increase in light output power per
unit of drive current. The amount is given by
the angle of the straight light output power
line with respect to forward current in the
laser oscillating range.

Definition of Feature

dP/dlop

dP

6. Lasing wavelength ( p)

This is peak lasing wavelength at rated
light output power. The lasing spectrum is
broadly classified as either a single mode
or a multi-mode as shown in the figure on
the right, and peak lasing wavelength is
defined by the maximum spectral intensity
in either mode.

Output power P

Forward current IF

Output power vs. Forward current (P–IF)

Single mode

Lasing spectrum

dlop

Multi mode

7. Beam divergence angle : Parallel ( ), Perpendicular( )

Light radiating from laser chip diverges as shown in the figure on the lower left. When the
light distribution is measured in the parallel (X axis) and perpendicular (Y axis) directions
with respect to the surface of the PN-junction on laser chip, (a) and (b) are shown in the
figure on the lower right. The beam divergence angle at 1/2 of the peak intensity of the light
distribution (full angle at half maximum) is defined as and .

Rear

PN-junction

Laser chip

Beam divergence

Front

1.0

Light

output power

0.5

Angle Angle

(a) (b)

Beam divergence ( , )

1.0

0.5

11

Definition of Feature

8. Light axis off angle : Parallel ( ), Perpendicular ( )

This is expressed by a light axis shift with
respect to a reference surface. In a beam
divergent distribution of the parallel and
perpendicular directions as shown in the
figure on the right, shifts in both directions are
defined by (a - b)/2.

9. Light emission off center point (∆ X, ∆ Y, ∆ Z)

This is expressed by a shift in
the position of the light emitting
area. ∆ X and ∆ Y represent the
shift from the center of the
package, while ∆ Z represents a
shift with respect to stipulated
positions (a) from a reference
surface to the edge of a laser
diode (LD).

Top view

Light emission off center point (∆ X, ∆ Y, ∆ Z)

Light
output power

a

0

ZY

Side view

(a–b)/2

Light axis
off angle

Angle

LD facet

a

Reference plane

1.0

0.5
b

Light axis off angle ( , )

X

10. Astigmatism (As)

An astigmatism refers to a shift in focus position seen in the perpendicular and parallel
directions on the PN-junction surface of laser chip as shown in the figure on lower left.

11. Droop (∆ P)

This is the rate of light output power attenuation when a laser is driven by pulsed constant
current. The rate is defined by (A - B)/B x 100 % as shown in the figure on the lower right.

∆ P=(A–B)/Bx100%

A

Droop (∆ P)

600Hz

Duty : 10%

Duty : 90%

B

Time T

Laser chip

Astigmatism As

Focus position seen
in the parallel direction

Focus position seen
in the perpendicular
direction

Output power P

Laser beam

Astigmatism (As)

12

Precautions for Use

Precautions for use

1. Temperature characteristics

Laser characteristics (wavelength, operating
current) vary with temperature, and variation
is more extreme at shorter wavelength. We
recommend installing an APC circuit to main
tain a constant output because operating
current varies significantly with temperature.
By the same token, laser reliability can be im
proved by designing products based on their
heat release characteristics. Since laser reli
ability falls off steeply at a higher tempera
ture, never allow the case to exceed the op
erating temperature range given in specifica
tions while a laser is in use.

25°C 50°C 70°C

Output power P

Forward current IF

Temperature characteristics of I-L curves

2. Thermal radiation

Make sure that a thermal radiating plate (W 30 x L 30 x t 5 mm) made of aluminum or
some other high thermal conducting materials is mounted to laser diode. The reliability
of laser diode is closely linked to junction temperature, so reliability rapidly declines at
a higher temperature. Do not overlook thermal radiation.

Thermal radiating plate
(Al or Cu)

3. Measuring light output power

Use a light power meter to measure light output
power of laser diodes. When measuring with APC
drive, set a power meter at an angle as shown in
the right figure so that a photodiode in a laser
diode is not exposed to reflected light from the
power meter.

Laser diode

Power meter

20°

13

Precautions for Use

4. Absolute maximum ratings

Do not exceed, even momentarily, the maximum ratings.
When laser diode is driven in excess of the maximum ratings, it causes not only instant
breakdown or deterioration but also considerable reduction in reliability.

(1)

Laser diode may be damaged by surge current generated at power on-off operation.
Check on the transient characteristics of power supply to make sure that such surge
current does not exceed the maximum ratings.

(2)

The maximum ratings are specified by case temperature at 25˚C. Design should be
made well to work with temperature. As temperature goes up, power dissipation as
well as maximum light output power is reduced.

5. Soldering conditions

Maximum temperature is set at 260˚C and soldering time is within 3.0 seconds and
minimum clearance of 1.6 mm from the root of a lead is necessary.

6. Prevention of breakdown due to static electricity or surge current

Laser diode may be adversely affected by static electricity and surge current and,
consequently causes breakdown of element and reduction of reliability unless the
following cares are taken :

(1)

Power supply, installation and measuring equipment should be grounded. A noise
filter or noise-cut transformer is to be provided to power supply input utilized.

(2)

During operation, working clothes, hats and shoes should be static-protected when in
use.
Also, a workman body should be static-protected by use of an earth-band or the like
and grounded through high resistance (500 kΩ - 1MΩ ).

(3)

A soldering iron should be grounded to protect laser diodes from voltage leak.

(4)

Any container for carriage and storage should be static-protected.

(5)

Avoid using laser diodes at a place where high frequent surge current may be
generated as an inductive electric field gives breakdown or deterioration. (Avoid being
placed around fluorescent grow lamp, for example).

14

Soldering iron with surge protection

Static protected clothes

Conductive table mat

Grounded band

190

Humidifier

Conductive floor mat

1MΩ

7. COD (Catastrophic Optical Damage) level

If current is flowing into the forward direction
and output continues to rise following a kink or
other deviation, then the laser eventually
reaches facet breakdown (COD) level where
the crystal at the facet melts due to the high
optical density. Special care must be taken in
the handling of red lasers because they may
continue to oscillate with a low power of 2 to 3
mW even after occuring facet breakdown.
There are several ways to tell whether an ele
ment is damaged or destroyed, such as
through a far field pattern or an increase in the
operating current. The life of a laser is signifi
cantly curtailed once the element is damaged,
so special care must be taken to avoid not
only excessing current when adjusting the out
put, but surge like static electricity as well.

Precautions for Use

COD level

Kink level

Output power P

Forward current IF

Output power vs. Forward current (P–IF)

Near field pattern

(A) Nomal laser

Near field pattern

(B) Damaged laser due to COD

Normal laser

Damaged laser

∆ lop

Po

Far field pattern

Damaged laser due to COD Output power vs. Forward current

Output Power (mW)

Forward current (mA)

lop1

lop2

15

Precautions for Use

ESD data

(1) Measurement circuit

R=2MΩ

(2) Example of ESD data

100

80

60

40

Alive rate (%)

20

C=200pFV

AlGaInP Red laser diode

LD

(Machine model)

Judgment : ∆ lop 1.5mA

0

0

100

80

60

40

Alive rate (%)

20

0

0 20 40

20 40

60 80 100

Supplied voltage (V)

AlGaAs Infrared laser diode

60 80 100 120

Supplied voltage (V)

16

8. Polarizing characteristics

Precautions for Use

Polarizing characteristics of red lasers vary
with distortions in the active layer. Conven

Y

635nm polarizing direction

tional infrared lasers as well as 650 to 675nm
lasers oscillate in the TE mode (polarizing di
rection parallel to the junction plane). As
such, special care must be taken when using

650–675nm, 780nm

X

polarizing direction

polarized optical parts with 635nm laser (ex
cept DL-LS1035) because it oscillates in the
TM mode (polarizing direction parpendicular

Top view of the stem

to the junction plane).

9. Package handling

(1)

Package must not be cut off, reworked nor deformed. Do not hold the cap of laser
diode tight, otherwise it may bring about cracks onto the window glass.

(2)

Do not touch the surface of the window glass. Any scratch or contamination may result
in reduction of optical characteristics.

(3)

Remove small contaminations on the surface softly using a cotton stick with a small
amount of methyl alcohol.

17

Packaging

Packaging

192mm

43mm

1

Internal box

ESD
protective bag
(2tray / bag)

51mm

192mm

235mm

235mm

150

tray

Stem type Laser (300P)

100

Internal box

ESD
protective bag
(10tray / bag)

1

tray

18

Frame type Laser (1000P)

Laser Drive System

Drive Circuit Recommendations

1. APC Circuit

GND

Im

R3
50k

V1

R4

4.7k

1/2 LA6358N

+

OP1

–

10µ

1k

2.2k

2.2k

+

5V

2.2k

V1

V2

1/2 LA6358N

–

OP2

+

47k5k

100k

470

1µ

2SD600

+

33µ

This APC drive circuit is used for type I pin connecting diagram.
When a laser diode (LD) emits light, light current (Im) proportionated to light output
power flows to a monitoring photodiode (PD) and a voltage V1 = Im (R3+R4) generates.
This voltage is sent by the op amp OP1 through a buffer to the op amp OP2.
Reference voltage V2 obtained from constant-voltage diode and volume switch is also
sent to the op amp OP2.
The op amp OP2 compares two voltages and then varies base current of output
transistor while controlling the current flowing to laser diode so that V1 = V2 is constantly
maintained. This is how constant light output power is obtained.

LDPD

R1

47µ

+

39

R2
10

Unit (Resistance : Ω Capacitance : F)

0.1µ

–

12V

Adjustment

Turn volume switch R3 as high as it will go, and set 5 kΩ volume switch so that V2 = 0.

(1)

Mount laser diode with power turned off.

(2)

Turn power on, and turn 5 kΩ volume switch to the center point while measuring light

(3)

output power with a light power meter. Here, light output power should be 1/2 of the
setting level. If difference from the setting level is significant, then turn off power and
adjust R3 and R4.
Turn volume switch R3 until light output power matches the setting level.

(4)

R1 – R4 setting procedure

Set light output range based on the data for laser diode characteristics and then use

(1)

the table below to determine proper operating current and monitoring output current
for light output power.

Light

output power

Pmax

Pmin

Operating

current

Imax

Imin

Monitoring

output current

Im max

Im min

19

Laser Drive System

(2)

Set power resistance R1 and R2 for Imax based on table 1 used with the ACC circuit.

(3) After adjustments on the previous page, V2 will be about 1.7 volts.

Determine resistance R4 so that Immax x R4 = 1.7.

(4) Determine resistance R3 so that Immax x (R3 + R4) = 1.7. (Pmax = 4 mW and

Pmin = 1 mW when using 3 mW.)

2.APC Circuit

1/2 LA6358N

Im

PD

R3

1k

R4
100

+

–

OP1

10µ

1k

2.2k

+

2V

5k

5.6k

V1

V2

2k

–

OP2

+

1/2 LA6358N

33µ

+

470

100k

2SD600

1µ

+

47µ

R1
39

LD

Unit (Resistance : Ω Capacitance : F)

12V

0.1µ

GND

This drive circuit is used for type II pin connecting diagram. Operating principle
and adjustment procedure is exactly the same as that for APC circuit 1, except
that the resistance R3 and R4 settings are different.

R1 – R4 setting procedure

(1)

V2 in the circuit is about 0.26 volt, so determine resistance R4 so that Immax x R4 = 0.26.

(2)

Determine resistance R3 so that Immin x (R3 + R4) = 0.26. (Be sure to set R3 so that

voltage V1 is less than 0.5 volt because reverse bias is not applied to a photodiode).

3.APC Circuit

5V

1k

5k

2.2k

+

47k

2.2k2.2k

V2

V1

1/2 LA6358N

+

OP2

–

470

100k LD

33µ

2SB631

1µ

R2
10

47µ

+

0.1µ

R1
39

Unit (Resistance : Ω Capacitance : F)

R3
50k

Im

R4

4.7k

PD

–

OP1

+

1/2 LA6358N

+

10µ

This drive circuit is used for type III pin connecting diagram. The circuit is a version
of APC circuit 1 altered for reverse polarity characteristics and has the same
operating principle, adjustment procedure and resistance settings as APC circuit 1.

20

12V

GND

Laser Drive System

4. APC Circuit

GND

+

C2
10µF

C1=1µ

TR1

2SC3383

0.6V

PD

R3
15kΩ

R4
5kΩ

LD

10kΩ

1kΩ

20µF

–

3V

(50Ω )

TR2

2SC3383

+

This is an example of an APC circuit for battery-powered Type I pin connection
circuits. It is ideally suited for a low-current DL-3148-023 The reference voltage
here is the voltage between the base and emitter of transistor TR1, and is normally

0.6 volts.
Since the absolute maximum rated power of the DL-3148-023 is 3 mW, the power
adjustment range for the circuit is between 0.5 and 2 mW. Resistors R3 and R4
used for adjusting power are set as outlined below.
Since Im is 0.12 mA at a maximum power of 2 mW, then R4 = VBE / Im = 0.6 / 0.12
= 5kΩ .
Then since R3 determines minimum optical output and Im is 0.03 mA with 0.5mW
of power, then R3 + R4 = VBE / Im = 0.6 / 0.03 = 20kΩ and R3 =15kΩ .

21

Safety

The output light from laser diode is visible or invisible, and harmful to a human eye. Avoid looking at the output light of
laser diode directly or even indirectly through a lens while oscillating. When an optical axis is to be adjusted to a laser
beam and outer optical systems, a laser beam should be observed through an infrared TV camera or other equipment.
Particularly when the light is collimated or focused through a lens, safety glasses should be worn and care should be
taken to absolutely protect human eyes from the directly entering beam.

CAUTION – THE USE OF OPTICAL INSTRUMENTS WITH THIS PRODUCT WILL INCREASE EYE HAZARD.

Refer to IEC 825-1 and 21 CFR 1040.10 - 1040.11 as a radiation safety standard as to laser products.

LASER DIODE

Type :

Manufactured :

LASER DIODE

I S O

VISIBLE LASER RADIATION­AVOIDE DIRECT EXPOSURE TO BEAM

PEAK POWER 50 mW

WAVELENGTH 635-685 nm

CLASS IIIb LASER PRODUCT

AVOID EXPOSURE

-Visible laser radiation
is emitted from this aperture

INVISIBLE LASER RADIATION­AVOIDE DIRECT EXPOSURE TO BEAM

PEAK POWER 200 mW

WAVELENGTH 780-830 nm

CLASS IIIb LASER PRODUCT

This product complies with 21 CFR 1040.10
and 1040.11.

TOTTORI SANYO ELECTRIC CO., LTD.

LED DIVISION
5-318, Tachikawa, Tottori 680-8634 Japan

LASER DIODE

AVOID EXPOSURE

-Invisible laser radiation
is emitted from this aperture

Quality assurance system

LED Division of Tottori SANYO Electric Co., Ltd. takes pride in providing its customers
with the highest quality LED products possible. We are especially proud of the fact that all
LED products of our company have already obtained the verification of ISO 9001 in ac
cordance with IECQ (IEC Quality Assessment for Electronic Components). The produc
tion system is carried out in one continuous operation, including such processes as syn
thesis of compound semiconductors, single crystal growth and final display assembly. It
is our goal that, by making the best use of such production system, we develop quality
control activities which are supported by the verification of ISO, and offer the products in
100% conformance with our customers specifications.

Our quality assurance activities
for release of continually improving
new products are carried out re
flecting customers desires which
are constantly fed back into our
production lines. Our mass-pro
duction is controlled by standar
dized processes such as mass­production trial approval, a quality
control method to confirm the trial
products being made identical.

The guarantee shall be applied
only to the products delivered by
our company.

Environmental management system

Electronic Device Business Headquarters LED Division of Tottori Sanyo Electric Co.,
Ltd. has already obtained the verification of ISO 14001 in accordance with the assess
ment approval system of Environmental management system. The sphere of ISO 14001
are the development, design, manufacture and sales on the Optoelectoronic device.

45