Sony SLD302XT Datasheet
200mW High Power Laser Diode
Description
The SLD302XT allows independent thermal and electric design.
This laser diode has a built-in TE (Thermo Electric) cooler.
Features
• High power
Recommended optical power output Po = 180mW
• Low operating current
• Flat Package with built-in photodiode, TE cooler and thermistor
Applications
• Solid state laser excitation
• Medical use
Structure
AlGaAs double-hetero-type laser diode
Operating Lifetime
MTTF 10,000H (effective value) at Po = 180mW, Tth = 25°C
Absolute Maximum Ratings (Tth = 25°C)
• Optical power output Po 200 mW
• Reverse voltage VR LD 2 V
PD 15 V
• Operating temperature Topr –10 to +50 °C
• Storage temperature Tstg –40 to +85 °C
– 1 –
E88062C02-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.
SLD302XT
12
T
H LD
TE Cooler
PD
PN
34 56 78
18
Equivalent Circuit
No.
1
2
3
4
5
6
7
8
Function
TE cooler (negative)
Thermistor lead 1
Thermistor lead 2
Laser diode (anode)
Laser diode (cathode)
Photodiode (cathode)
Photodiode (anode)
TE cooler (positive)
Pin Configuration (Top View)
Warranty
This warranty period shall be 90 days after receipt of the product or
1,000 hours operation time whichever is shorter.
Sony Quality Assurance Department shall analyze any product that
fails during said warranty period, and if the analysis results show
that the product failed due to material or manufacturing defects on
the part of Sony, the product shall be replaced free of charge.
Laser diodes naturally have differing lifetimes which follow a Weibull
distribution.
Special warranties are also available.
– 2 –
SLD302XT
Electrical and Optical Characteristics (Tth: Thermistor temperature, Tth = 25°C)
Handling Precautions
Eye protection against laser beams
The optical output of laser diodes ranges from
several mW to 1W. 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.
Item
Symbol
Conditions
Min.
Typ. Max. Unit
Ith
Iop
Vop
λp
Imon
θ⊥
θ//
∆X, ∆Y
∆φ⊥
ηD
Rth
Threshold current
Operating current
Operating voltage
Wavelength
∗
Monitor current
Radiation angle
Positional accuracy
Differential efficiency
Thermistor resistance
PO = 180mW
PO = 180mW
PO = 180mW
PO = 180mW
VR = 10V
PO = 180mW
PO = 180mW
PO = 180mW
Tth = 25°C
770
0.65
150
350
1.9
0.3
28
12
0.9
10
200
500
3.0
840
40
17
±100
±3
mA
mA
V
nm
mA
degree
degree
µm
degree
mW/mA
kΩ
Perpendicular
Parallel
Position
Angle
∗
Wavelength Selection Classification
Type
SLD302XT-1
SLD302XT-2
SLD302XT-3
Wavelength (nm)
785 ± 15
810 ± 10
830 ± 10
Type
SLD302XT-21
SLD302XT-24
SLD302XT-25
Wavelength (nm)
798 ± 3
807 ± 3
810 ± 3
APC
ATC
Safety goggles for
protection from
laser beam
IR fluorescent plate
Optical
material
Optical power output control device
temperature control device
Lens
Laser diode
Optical boad
– 3 –
SLD302XT
Example of Representative Characteristics
Optical power output vs.
Forward current characteristics
IF – Forward current [mA]
Po – Optical power output [mW]
Optical power output vs. Monitor current characteristics
Imon – Monitor current [mA]
Po – Optical power output [mW]
Threshold current vs. Temperature characteristics
Tth – Thermistor temperature [°C]
Ith – Threshold current [mA]
Power dependence of far field pattern
(parallel to junction)
Angle [degree]
Radiation intensity (optional scale)
Power depecdence of near field pattern
Radiation intensity (optional scale)
Oscillation wavelength vs. Temperature characteristics
Tth – Thermistor temperature [°C]
λp – Oscillation wavelength [nm]
0 250 500
0
100
200
Tth = 0°C
Tth = 25°C
Tth = 50°C
0 0.1 0.2
0
100
200
Tth = –10°C
Tth = 0°C
Tth = 25°C
Tth = 50°C
–10 0 10 20 30 40 50
100
500
1000
–30 –20 –10 0 10 20 30
Tth = 25°C
PO = 180mW
PO = 90mW
PO = 30mW
50µm
Tth = 25°C
PO = 180mW
P
O = 150mW
PO = 100mW
P
O = 75mW
PO = 50mW
PO = 25mW
–10 0 10 20 30 40 50
780
790
830
820
810
800
PO = 180mW
Tth = –10°C
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