SINGLE FREQUENCY LASER DIODES
Stabilized Ridge Waveguide Laser
General Product Information
Product
780 nm Wavelength Stabilized Laser
with hermetic 8-Pin TO Package (RoHS compliant)
including Monitor Diode, Thermoelectric Cooler and Thermistor
Application
Metrology
Interferometry
Absolute Maximum Ratings
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Storage Temperature
TS
°C
-40
85
Stress in excess of one of the Absolute Maximum
Ratings may damage the laser. Please note that a
damaging optical power level may occur although
the maximum current is not reached. These are
stress ratings only, and functional operation at
these or any other conditions beyond those
indicated under Recommended Operational
Conditions is not implied.
Operational Temperature at Case
TC
°C
-20
75
Operational Temperature at Laser Chip
TLD
°C
0
50
Forward Current
IF
mA
200
Reverse Voltage
VR
V
2
Output Power
Popt
mW
100
TEC Current
ITEC
A
1.0
TEC Voltage
VTEC
V
1.0
Recommended Operational Conditions
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Operational Temperature at Case
Tcase
°C
-20
65
Operational Temperature at Laser Chip
TLD
°C
15
45
measured by integrated Thermistor
Forward Current
IF
mA
180
Output Power
Popt
mW
20
80
Characteristics at TLD = 25° C at BOL
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Center Wavelength
λC
nm
778
780
783
Selectable Linewidth
△λ
pm
0.1
single mode operation
Overall Linewidth
△λ
nm
0.2
multi mode operation
Temperature Coefficient of Wavelength
dλ/ dT
nm / K
0.06
Current Coefficient of Wavelength
dλ/ dI
nm / mA
0.003
Sidemode Supression Ratio
SMSR
dB
30
45
under single mode condition
Characteristics at TLD = 25° C at BOL cont'd
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Laser Current @ Popt = 80 mW
ILD
mA
180
Slope Efficiency
η
W / A
0.6
1.0
1.4
Threshold Current
Ith
mA
70
Divergence parallel (FWHM)
Θ∥
°
8
parallel to Pin 1 - Pin 6 plane
Divergence perpendicular (FWHM)
Θ⊥
°
21
perpendicular to Pin 1 - Pin 6 plane
Monitor Diode
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Monitor Detector Responsivity
Imon / Popt
μA/mW
2
UR = 5 V
Thermoelectric Cooler
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Current
ITEC
A
0.4
Popt = 80 mW, ΔT = 20 K
Voltage
UTEC
V
0.4
Popt = 80 mW, ΔT = 20 K
Power Dissipation (total loss at case)
Ploss
W
0.4
Popt = 80 mW, ΔT = 20 K
Temperature Difference
△T
K
40
Popt = 80 mW, ΔT = |Tcase - TLD|
Thermistor (Standard NTC Type)
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Resistance
R
kΩ
10
TLD = 25° C
Beta Coefficient
β
3930
R1 / R2 = e b (1/T1 - 1/T2) at TLD = 0° … 50° C
Steinhart & Hart Coefficient A
A
1.029 x 10 -3
1/T = A + B(ln R) + C(ln R)3
Steinhart & Hart Coefficient B
B
2.510 x 10 -4
T: temperature in Kelvin
Steinhart & Hart Coefficient C
C
1.051 x 10 -7
R: resistance at T in Ohm
Pin Assignment
1 Laser Diode Anode
5 Thermistor
2 Laser Diode Cathode
6 Thermistor
3 Thermoelectric Cooler (-)
7 Photo Diode Anode
4 Thermoelectric Cooler (+)
8 Photo Diode Cathode
All 8 pins are isolated from case.
Package Drawings
Typical Measurement Results
Spectral maps at 25° C and 35° C
The spectral maps show the power spectral density atdifferent operating modes. The graphs illustrate that the laser exhibits single and multi mode behavior under different operational conditions. The spectral maps may differ from part to part. Single mode operation can be achieved by selecting the appropriate laser current and temperature.
商品属性 [波长] 780nm [功率] 80mW