Sony SLD1231VL Datasheet

SLD1231VL

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High Power Red Laser Diode

Description

The SLD1231VL is a short wavelength high power
laser diode, created as a light source for the next­generation high density magneto-optical discs.

Features

• Red visible light (685nm)

• Longitudinal single mode

• High power

(Recommended optical power output: 30mW)

Applications

Magneto-optical discs

Structure

• AlGaInP quantum well structure laser diode

Package Outline

Window Glass

Reference
Plane

∗Optical
Distance = 1.35 ± 0.08

Reference
Slot

LD Chip
& Photo
Diode

90°

0.25

Preliminary

M-274

1.0

0.5

3

2

φ5.6 – 0.025

φ4.4 MAX
φ3.7 MAX

φ1.0 MIN

231

0.4

1

0

0.5 MIN

∗1.26

3 – φ0.45

PCD φ2.0

Unit : mm

2.6 MAX

1.2 ± 0.1

6.5

Recommended Optical Power Output

30mW

Absolute Maximum Ratings

• Optical power output Po 35 mW

• Reverse voltage VR LD 2 V

PD 15 V

• Operating temperature Topr –10 to +50 °C

• Storage temperature Tstg –40 to +85 °C

Connection Diagram Pin Configuration

COMMON

3

PD

LD

2

1

21

3

Bottom View

1. LD anode

2. PD anode

3. COMMON

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.

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PE95313-PP

SLD1231VL

Electrical and Optical Characteristics (Tc = 25°C) Tc: Case temperature

Item

Threshold current
Operating current
Operating voltage
Wavelength

Radiation
angle

Perpendicular
Parallel

Position
Positional
accuracy

Angle

Symbol Conditions Min. Typ. Max. Unit

Ith
Iop
Vop

λp
θ⊥
θ//

∆X, ∆Y, ∆Z
∆φ⊥
∆φ//

Differential efficiency
Astigmatism

SE
As

Handling Precautions

(1) Eye protection against laser beams
The optical output of laser diodes ranges from
several mW to 3W. 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.

Po = 30mW
Po = 30mW
Po = 30mW
Po = 30mW
Po = 30mW

Po = 30mW
Po = 30mW
Po = 30mW
Po = 30mW

Laser diode

Lens

670

19

6

0.15

Optical
material

Optical board

55
95

2.4

685

23

9

70

120

3.0

699

27
12

degree
degree

±80

±3
±3

0.60
5

Safety goggles for
protection from laser beam

1.0
10

IR fluorescent plate

degree
degree

mW/mA

mA
mA

V

nm

µm

µm

Optical power output control device
Temperature control device

(2) Prevention of surge current and electrostatic discharge
Laser diode is most sensitive to electrostatic discharge among semiconductors. When a large current is
passed through the laser diode even for an extremely short time (in the order of nanosecond), the strong light
emitted from the laser diode promotes deterioration and then laser diodes are destroyed. Therefore, note that
the surge current should not flow the laser diode driving circuit from switches and others. Also, if the laser
diode is handled carelessly, it may be destructed instantly because electrostatic discharge is easily applied by
a human body. Be great careful about excess current and electrostatic discharge.

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