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compact fiber-optic time delay coil - dispersion compensation trimmer
Compact Time Delay Coil, Connector Configurable
5 Weeks
5 Weeks


  • Type
    Fixed Delay Line
  • Fiber Type
  • Operating Wavelength
    1260-1650 nm
  • Maximum Insertion Loss
    <0.5 dB/km
  • Typical Insertion Loss
    <0.3 dB/km
  • Operating Temperature
    -40 to 85 °C
  • Dimensions
    152.4 x 152.4 x 40.39 mm
  • Length
    10 to 4000 m
  • Optical Delay Range
    Dependent on fiber length


Compact, Rugged Design

No more large fiber spools to occupy your work area and no more high losses associated with small diameter spools! Newport's Compact Time Delay Coils fill a void in the Photonics market where large time delays yet small sizes are essential. Each coil is ruggedly packaged to withstand serious handling in field applications.

Order a Custom Delay Length

Construct the part number for a time delay coil of any fiber length from 10 m to 4000 m using this template. For example, to order a time delay coil 1350 meters long with FC/APC connectors, use part number F-TDC-OPT-N1N3N5N0FA. Time Delay Coils cannot be ordered online. Please call Newport to obtain pricing or to place an order.

Calculate Required Delay Length

To calculate the required fiber length to obtain a specific time delay, use the following formula: L = c Δt / n where c is the speed of light in vacuum, Δt is the desired time delay, and n is the index of refraction of fused silica at the wavelength of interest (use n = 1.4677 at 1310 nm and n = 1.4682 at 1550 nm).


  • Optical buffer for optical networks
  • Gyroscope, sensor and signal processing
  • Radar and instrument calibration
  • Laser spectroscopic measurement
  • Time delay for opto-electronic oscillators
  • Nonlinear fiber loop
  • Optical network testing and analysis
  • Optical packet switching, buffering, routing and input/output synchronization