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

φ5.6 – 0.025

φ4.4 MAX φ3.7 MAX

φ1.0 MIN

231

0.4

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

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

0.15

Optical material

Optical board

55 95

2.4

685

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

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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