Variable Optical Delay Line Module - Switching Based

Turn-key solution with N-bit high resolution and lossless option
  • High Resolution
  • High Speed
  • Large Time Delay Range
  • High Reliability
  • Low Insertion Loss
  • Low Power Consumption



This N-bit (N ≥ 10) Photonic Time Delay Module selectively routes optical signals through N fiber segments with the different lengths. Each fiber segment is defined to have the delay asWhere dT is the increment of time delay.

Therefore, the module provides N-bit of digitally variable time delay, having the total time delay asN and dT can be defined by customer.

The EDFAs is used in the module to compensate the optical loss through optic fiber segments and switches. The optical loss between the optic fiber segment and the bypassing path is balanced internally to get the excellent uniformity of optical power between different time delays in long time delay ranges.


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N-bit Photonic Delay Module Min Typical Max Unit
Wavelength band 1535 1550 1565 nm
Insertion Loss [1] 0 0.5 dB
Cross Talk 25 30 40 dB
Switching Time CL type 50 100 µs
NS type 150 300 ns
Repetition Rate [2] CL type 2 kHz
NS type 100 kHz
Delay Time Range [3] 0.05 TBD[4] ns
Polarization Dependent Loss 0.25 0.5 dB
IL Uniformity [5] 1.0 1.5 dB
Return Loss 50 dB
Operating Temperature 0 60 oC
Optical Power Handling 0 dBm
Storage Temperature -40 85 oC
Fiber Type SMF-28
Package Dimension [6] 19” mount rack
[1]: Defined at the input power from -10dBm to 0dBm [2]: Defined in each switch. [3]: The minimum delay can be as short as 0.01ns if needed, please contact us. [4]: The maximum delay is defined by the bit number and delay increment. [5]: Between the different time delays [6]: The height of 19” mount rack will be determined by the total time delay.