– 2 –

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//

As

Im

10

35

—

780

20

7

—

—

—

0.7

—

—

20

55

2.0

790

24

9

—

—

—

1.0

—

0.10

40

70

2.5

800

28

12

±80

±3

±3

1.3

6

—

mA

mA

V

nm

degree

degree

µm

degree

degree

mW/mA

µm

mA

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

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.