Lasers & Optical Fibers Technologies
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 variable 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
| CUSTOM | |
|---|---|
| Fiber core diameter | From 50 mm to 500 mm |
| Fiber external diameter | From 80 µm to 600 µm |
| Fiber length | Up to 50 km |
| Fiber width | From 5 mm to 500 mm |
| Fiber tension | From 20 g to 2 kg |
| Coating material | Polymer, polyimide, others |
| Spool stand | Copper, aluminium, plastic, others |
| Connectors | Please specify |