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 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 fiber | SM, MM, PM |
| Operating wavelength | from UV to IR |
| Coating materials | Please specify (polymer, polyimide, others) |
| Total length | Up to 50km (SM), up to 8km (MM), up to 2km (PM), +/-5% |
| Dimensions | ID min.= 60mm |
| Terminations | Tube, connector |
| Packaging | None, plate, case, rack, thermalized |
| Connectors | Please specify |
| Passive delay - Examples @1550nm | |
| 100µs | 20km |
| 10µs | 2000m |
| 5µs | 1000m |
| 2.5µs | 500m |
| 5.24ns | 1m |
ps-accuracy delay measurement in option
