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 (
5.6mm)
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 = 25C)
Optical power output
P
O
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
1
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
LD
PD
3
2
1
Pin Configuration
2
1
3
Bottom View
1. LD anode
2. PD anode
3. COMMON
For the availability of this product, please contact the sales office.
2
SLD231VL
Optical and Electrical Characteristics (Tc = 25C)
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
//
X,
Y,
Z
//
D
As
Im
P
O
= 35mW
P
O
= 35mW
P
O
= 35mW
P
O
= 35mW
P
O
= 35mW
P
O
= 35mW
P
O
= 35mW
P
O
= 35mW, Vr = 5V
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
m
degree
degree
mW/mA
m
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
reaches 1MW/cm
2
. 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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