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Time delay coil (ns/m range) / Optical delays

Create a fixed time delay with our fiber optic coil

Time delay coil (ns/m range) summary

According to your delay requirement, we advise and provide the most appropriate time delay coil. The optical delay depends on the fiber type and length. For example, a 20 km fiber coil will create a fixed delay up to 100 µs.

How to calculate a delay according to a fiber 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).

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    Features
    • Fixed delay
    • Totally passive
    • All types of optical fibers : SM, MM, PM, from UV to IR
    • Coating materials (polymer, polyimide)
    • Length: up to 50 km
    • With or without stand (copper, aluminium, plastic)
    • Adjustable fiber tension : from 20 g to 2 kg
    • Customizable (fiber end connection, etc.)
    Applications
    • Telecommunications: coherent receivers, TDM
    • Long delays: interferometers, OCT, wavemeters
    • Optical phase adjustment (distance change ~wavelength / 2pi phase)
    • Autocorrelator: relative timing between 2 ultra-short pulses
    • Pump-probe measurement: measure a response to pulse after a given delay
    Specifications
    Totally configurable
    Type of fiberSM, MM, PM
    Operating wavelengthfrom UV to IR
    Coating materialsPlease specify (polymer, polyimide, others)
    Total lengthUp to 50km (SM), up to 8km (MM), up to 2km (PM), +/-5%
    DimensionsID min.= 60mm
    TerminationsTube, connector
    PackagingNone, plate, case, rack, thermalized
    ConnectorsPlease specify
    Passive delay - Examples @1550nm
    100µs20km
    10µs2000m
    5µs1000m
    2.5µs500m
    5.24ns1m

    ps-accuracy delay measurement in option

    All products