10-18 Bits MEMS Variable Fiber Optical Time Delay Line

Customer-defined delay fiber loop with up to 18 bit resolution

The MEMS Series 18-bit Photonic Time Delay digitally varies the delay time inside a fiber with exceptionally large range (maximum delay) and precision (bit). It selectively routes optical signals through N fiber loops whose lengths increase successively by a power of 2. Since each switching element allows the signal to either pass or bypass a fiber loop, a delay T may be inserted, which can take any value (in increments of DT) up to the maximum value T.

This is achieved using a patent pending MEMS configuration and activated via an electrical control signal. Latching operation preserves the selected optical path after the drive signal has been removed. The unit is a completed module with built-in driver.

10-18 Bits MEMS Variable Fiber Optical Time Delay Line

The MEMS Series 18-bit Photonic Time Delay digitally varies the delay time inside a fiber with exceptionally large range (maximum delay) and precision (bit). It selectively routes optical signals through N fiber loops whose lengths increase successively by a power of 2. Since each switching element allows the signal to either pass or bypass a fiber loop, a delay T may be inserted, which can take any value (in increments of DT) up to the maximum value T. This is achieved using a patent pending MEMS configuration and activated via an electrical control signal. Latching operation preserves the selected optical path after the drive signal has been removed. The unit is a completed module with built-in driver.
18-bit MEMS Delay Line with VOA Min Typical Max Unit
Wavelength Band 780 1550 2000 nm
 Insertion Loss 3 4.5 dB
Polarization Dependent Loss (SM) 0.1 0.2 dB
Polarization Extinction Ratio (PM)       18 24 dB
Cross Talk       40 50 dB
Return Loss  50 55 dB
Switching Time (fall, rise) 10 ms
Fiber Segment Number 18 Loop
Delay Time Range 0 m s
Polarization Mode Dispersion 0.1  0.2 ps
VOA Range    30        40 50 dB
VOA Resolution Continuous  
VOA PDL       0.15 0.5 dB
Operating Temperature -5 70 oC
Storage Temperature -40 85 oC
Optical Power Handling 300 mW
Package Dimension [1] 72L x 15.5W x 6.5H mm