D2-135 Offset Phase Lock Servo

D2-135 Offset Phase Lock Servo for locking the phase and offset frequency of a slave laser to that of a master.



  • Offset Phase Locks from 250 MHz to ±9.3 GHz
  • Precisely control follower laser frequency while remaining referenced to the primary standard
  • User-adjustable servo parameters
  • Internal ramp generator
  • Fast frequency jumps with feed-forward
  • Offset frequency stability determined by reference stability

The D2-135 Offset Phase Lock Servo (OPLS) is designed to precisely control and quickly adjust the frequency detuning between a master and a follower laser.  The D2-135 forms a complete offset lock system when combined with the D2-250 Heterodyne Module and D2-260 Beat Note Detector.  The D2-250 overlaps the free-space master & follower lasers to generate the optical beat note.  It then launches the beat note into a fiber for delivery to the D2-260 where it is down-converted to the RF and then delivered to the D2-135 for processing.




Input Connection SMA
Input Impedance 50 Ω
Input Signal Range -10 to +10 dBm
Offset Range 250 MHz to >9.3 GHz
Reference Signal Range for Offset Range 30 to 240 MHz
Bandwidth 10 MHz
Gain Range 0 to -76 dB
Reference Signal Source Internal VCO or External input
VCO drift 500 ppm/°C
Power Input +5, ±15 VDC