SLD231VL Datasheet, PDF (2/3 Pages) Sony Corporation – Index-Guided High Power AlGaAs Laser Diode

SLD231VL
Optical and Electrical Characteristics (Tc = 25°C)
Tc: Case temperature
Item
Symbol
Conditions
Min. Typ. Max. Unit
Threshold current
Ith
10
20
40
mA
Operating current
Iop
PO = 35mW
35
55
70
mA
Operating voltage
Vop
PO = 35mW
—
2.0
2.5
V
Wavelength
λ
PO = 35mW
780 790 800
nm
Radiation
angle
Perpendicular θ⊥
Parallel
θ//
PO = 35mW
20
24
28 degree
7
9
12 degree
Positional
accuracy
Position
Angle
∆X, ∆Y, ∆Z
∆φ⊥
∆φ//
PO = 35mW
—
—
±80
µm
—
—
±3 degree
—
—
±3 degree
Differential efficiency
ηD
PO = 35mW
0.7
1.0
1.3 mW/mA
Astigmatism
As
PO = 35mW
—
—
6
µm
Monitor current
Im
PO = 35mW, Vr = 5V — 0.10 —
mA
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
Laser diode
Lens
Optical
material
IR fluorescent plate
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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