Sony SLD304XT Datasheet

1000mW High Power Laser Diode

Description

The SLD304XT allows independent thermal and electric design.
This laser diode has a built-in TE (Thermo Electric) cooler.

Features

• High power

Recommended optical power output Po = 900mW

• Low operating current

• Flat Package with built-in photodiode, TE cooler and thermistor

Applications

• Solid state laser excitation

• Medical use

Structure

AlGaAs double-hetero-type laser diode

Operating Lifetime

MTTF 10,000H (effective value) at Po = 900mW, Tth = 25°C

Absolute Maximum Ratings (Tth = 25°C)

• Optical power output Po 1000 mW

• Reverse voltage VR LD 2 V

PD 15 V

• Operating temperature Topr –10 to +30 °C

• Storage temperature Tstg –40 to +85 °C

– 1 –

E88066C02-PS

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

SLD304XT

12

T

H LD

TE Cooler

PD

PN

34 56 78

18

Equivalent Circuit

No.

1
2
3
4
5
6
7
8

Function
TE cooler (negative)
Thermistor lead 1
Thermistor lead 2
Laser diode (anode)
Laser diode (cathode)
Photodiode (cathode)
Photodiode (anode)
TE cooler (positive)

Pin Configuration (Top View)

Warranty

This warranty period shall be 90 days after receipt of the product or
1,000 hours operation time whichever is shorter.
Sony Quality Assurance Department shall analyze any product that
fails during said warranty period, and if the analysis results show
that the product failed due to material or manufacturing defects on
the part of Sony, the product shall be replaced free of charge.
Laser diodes naturally have differing lifetimes which follow a Weibull
distribution.
Special warranties are also available.

– 2 –

SLD304XT

Electrical and Optical Characteristics (Tth: Thermistor temperature, Tth = 25°C)

Handling Precautions

Eye protection against laser beams
The optical output of laser diodes ranges from
several mW to 1W. However the optical power
density of the laser beam at the diode chip
reaches 1MW/cm2. Unlike gas lasers, since
laser diode beams are divergent, uncollimated
laser diode beams are fairly safe at a laser
diode. For observing laser beams, ALWAYS use
safety goggles that block infrared rays. Usage of
IR scopes, IR cameras and fluorescent plates is
also recommended for monitoring laser beams
safely.

Item

Symbol

Conditions

Min.

Typ. Max. Unit
Ith
Iop
Vop

λp
Imon

θ⊥
θ//

∆X, ∆Y
∆φ⊥

ηD

Rth

Threshold current
Operating current
Operating voltage
Wavelength

∗

Monitor current

Radiation angle

Positional accuracy

Differential efficiency
Thermistor resistance

PO = 900mW
PO = 900mW
PO = 900mW
PO = 900mW

VR = 10V

PO = 900mW

PO = 900mW

PO = 900mW
Tth = 25°C

770

0.65

550

1600

2.2

1.5
28

13

0.85
10

750

2000

3.0

840

40
17

±100

±3

mA
mA

V

nm
mA

degree
degree

µm

degree

mW/mA

kΩ

Perpendicular
Parallel
Position
Angle

∗

Wavelength Selection Classification

Type
SLD304XT-1
SLD304XT-2
SLD304XT-3

Wavelength (nm)

785 ± 15
810 ± 10
830 ± 10

Type

SLD304XT-21
SLD304XT-24
SLD304XT-25

Wavelength (nm)

798 ± 3
807 ± 3
810 ± 3

APC

ATC

Safety goggles for
protection from
laser beam

IR fluorescent plate

Optical
material

Optical power output control device
temperature control device

Lens

Laser diode

Optical boad

– 3 –

SLD304XT

Example of Representative Characteristics

Optical power output vs. Forward current characteristics

IF – Forward current [mA]

0 500 1000 1500 2000

0

500

1000

Po – Optical power output [mW]

Optical power output vs. Monitor current characteristics

Imon – Monitor current [mA]

0 10.5

0

1000

500

Po – Optical power output [mW]

Threshold current vs. Temperature characteristics

Tth – Thermistor temperature [°C]

–10 0 10 20 30

100

1000

500

Ith – Threshold current [mA]

Power dependence of far field pattern

(parallel to junction)

Angle [degree]

–30 –20 0–10 10 20 30

Radiation intensity (optional scale)

780

790

800

810

820

830

λp – Oscillation wavelength [nm]

Oscillation wavelength vs. Temperature characteristics

Tth – Thermistor temperature [°C]

–10 0 10 20 30 40

Power dependence of near field pattern

200µm

Radiation intensity (optional scale)

Tth = –10°C

Tth = 0°C

Tth = 25°C

Tth = 30°C

Tth = 15°C

Tth = 15°C

Tth = 0°C

Tth = 25°C

Tth = 30°C

Tth = 25°C

Tth = 25°C

PO = 900mW

P

O =

900mW

PO = 900mW

PO = 800mW

PO = 600mW

PO = 400mW

PO = 200mW

PO =
800mW

PO =
600mW

P

O =

400mW
P

O =

200mW

Tth = –10°C