Sony SLD231VL Datasheet

Index-Guided High Power AlGaAs Laser Diode

Description

The SLD231VL is a high-power, index-guided AlGaAs

laser diode.

Features

• Low current consumption

• Small astigmatism

• Small package (φ5.6mm)

Applications

Pickup for optical discs

Structure

• AlGaAs quantum well structured laser diode

• PIN photodiode for optical power output monitor

Recommended Operating Optical Power Output 35mW

Absolute Maximum Ratings (Tc = 25°C)

• Optical power output PO 40 mW

• Reverse voltage VR LD 2 V

PD 15 V

• Operating temperature Topr –10 to +60 °C

• Storage temperature Tstg –40 to +85 °C

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E94Y22B97-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.

SLD231VL

M-274

Connection Diagram

COMMON

LDPD

Pin Configuration

Bottom View

1. LD anode

2. PD anode

3. COMMON

For the availability of this product, please contact the sales office.

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SLD231VL

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

Item Symbol Conditions Min. Typ. Max. Unit Threshold current Operating current Operating voltage Wavelength

Radiation angle

Positional accuracy

Differential efficiency Astigmatism Monitor current

Ith Iop Vop

λ θ⊥ θ//

∆X, ∆Y, ∆Z ∆φ⊥ ∆φ//

ηD

As Im

PO = 35mW PO = 35mW PO = 35mW

PO = 35mW

PO = 35mW PO = 35mW PO = 35mW, Vr = 5V

10 35 —

780

7 — — —

0.7 — —

20 55

2.0

790

9 — — —

1.0 —

0.10

40 70

2.5

800

28 12

±80

±3 ±3

1.3 6

—

mA mA

nm degree degree

µm degree degree

mW/mA

µm

Perpendicular Parallel Position

Angle

Handling Precautions

(1) Eye protection against laser beams The optical output of laser diodes ranges from several mW to 4W. 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.

Safety goggles for protection from laser beam

IR fluorescent plate

Optical material

Lens

Laser diode

Optical board

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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