SINGLE FREQUENCY LASER DIODES
Distributed Feedback Laser
General Product Information
Product
852 nm DFB Laser
with hermetic 14-Pin Butterfly Housing (RoHS compliant)
including Monitor Diode, Thermoelectric Cooler and Thermistor
with PM Fiber, integrated μ-Isolator and Angled Physical Contact (APC)
Application
Spectroscopy (Cs D2 line)
Metrology
Atomic Clock
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
-15 70
Operational Temperature at Laser Chip
TLD
°C
10 50
Forward Current
IF
mA
200
Reverse Voltage
VR
V
2
Output Power
Popt
mW
20
TEC Current
ITEC
A
1.8
TEC Voltage
VTEC
V
3.2
Recommended Operational Conditions
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Operational Temperature at Case
Tcase
°C
5
60
Operational Temperature at Laser Chip
TLD
°C
15
45
measured by integrated Thermistor
Forward Current
IF
mA
190
Output Power
Popt
mW
3
10
Characteristics at TLD = 25° at BOL
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Center Wavelength
λC
nm
851
852
853
see images
Target Wavelength
λT
nm
852.347
reached within TLD =15 ° ... 45° C at 10 mW
Linewidth (FWHM)
△λ
MHz
0.6
1
Mode-hop free Tuning Range
△λtune
pm
25
> 10 GHz, at target wavelength
Sidemode Supression Ratio
SMSR
dB
30
45
Popt = 10 mW
Temperature Coefficient of Wavelength
dλ / dT
nm / K
0.06
Current Coefficient of Wavelength
dλ/ dI
nm / mA
0.003
Characteristics at TLD = 25° at BOL cont'd
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Laser Current @ Popt = 10 mW
ILD
mA
190
exfiber
Slope Efficiency
η
W / A
0.08
Threshold Current
Ith
mA
70
Polarization Extinction Ratio
PER
dB
20
Popt = 10 mW
Monitor Diode
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Monitor Detector Responsivity
Imon / Popt
μA/mW
3
100
UR = 5 V
Thermoelectric Cooler
Parameter
Symbol
Unit
min
typ
max
Measurement Conditions / Comments
Current
ITEC
A
0.4
Popt = 10 mW, ΔT =30 K
Voltage
UTEC
V
1.5
Popt = 10 mW, ΔT =30 K
Power Dissipation (total loss at case)
Ploss
W
0.5
Popt = 10 mW, ΔT =30 K
Temperature Difference
△T
K
45
Popt = 10 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
3892
R1 / R2 = e b (1/T1 - 1/T2) at TLD = 0° … 50° C
Steinhart & Hart Coefficient A
A
1.1293 x 10-3
1/T = A + B(ln R) + C(ln R)3
Steinhart & Hart Coefficient B
B
2.3410 x 10-4
T: temperature in Kelvin
Steinhart & Hart Coefficient C
C
8.7755 x 10-8
R: resistance at T in Ohm
Pin Assignment
1 Thermoelectric Cooler (+)
14 Thermoelectric Cooler (-)
2 Thermistor
13 Case
3 Photodiode (Anode)
12 not connected
4 Photodiode (Cathode)
11 Laser Diode (Cathode)
5 Thermistor
10 Laser Diode (Anode)
6 not connected
9 not connected
7 not connected
8 not connected
Package Drawings
Fiber and Connector Type
Typical Measurement Results
Performance figures, data and any illustrative material provided in this specification are typical and must be specifically confirmed in writing by eagleyard Photonics before they become applicable to any particular order or contract. In accordance with the eagleyard Photonics policy of continuous improvement specifications may change without notice.
商品属性 [波长] 852nm [功率] 10mW