Wavelength Locker
Description
Optoplex’s Athermal Fabre-Perot Wavelength Locker is a thermally stable, etalon-based device that can be widely used in wavelength monitoring or ITU-grid channel locking in DWDM systems, laser stabilization for tunable laser, optical power and network monitoring. The wavelength locker has a wide capture range and excellent wavelength accuracy. A built-in thermistor can be used to calibrate out residue thermal effects when even higher wavelength accuracy is required or for a very narrow-FSR locker. The key optical component of the wavelength locker is an Etalon which is made in-house with Optoplex’s proven technology in thin-film optical coating and optical contact.
Features and Benefits of Wavelength Locker
Athermal design
C+L-band coverage by a single device
Extremely low temperature dependence
High wavelength accuracy
Periodical locking covers all channels
Built-in thermistor for better locking accuracy
Telcordia GR-468 & 1221 compliant
Applications of Wavelength Locker
Precision laser locking for DWDM and ultra DWDM transmitter
Wavelength monitoring
Laser stabilization for tunable laser module
DWDM channel frequency and optical power monitoring
Key Specifications of 25G & 50G Etalon-based Wavelength Lockers
Parameter
Unit
25GHz
50GHz
Wavelength Range
nm
1525 - 1565: C
1560-1620: L
1520-1620: C+LCenter Wavelength
ITU
Wavelength Accuracy over T, Pol and EOL
GHz
±1
±2
Polarization Dependent Accuracy
GHz
0.4
0.6
Wavelength Capture Range (from ITU)
GHz
9
18
Locking Slope at ITU Point
dB/GHz
~ 0.5 – 0.8
~ 0.5 – 0.8
Input Power Range
dBm
<10
<10
ORL Min
dB
45
45
PD Calibration Offset
dB
0.4
0.6
PD1 Responsivity (Reference)
A/W
0.1 to 0.4
0.16 to 0.32
PD2 Responsivity (Etalon)
A/W
0.1 to 0.4
0.16 to 0.32
PD Dark Current @5V (reverse bias)
nA
1
1
Temperature Sensor Supply Voltage
V
4 to 10
4 to 10
Temperature Sensor Monitor
mV/C
7 to 13
7 to 13