Optical Delay Line Modules

Optical Delay Lines

In fiber sensor technology, optical coherence tomography, and fiber-optic interferometers, the transmission time of the optical signal often has to be adjusted or delayed among the different optical paths. Different optical components and modules are available for such adjustments.

Fine adjustment of the delay time is carried out via phase shifters and fiber stretcher modules.

The manual and optical delay lines produce a transmission delay of up to 600 ps and greater. Special fiber coils are available for very large transmission delays. 

Manual and Motorized Delay Line Modules

Optical delays of up to 100 ps, 250 ps, or 600 ps can be produced with manually adjustable VariDelay I series delay lines.

Phase Shifters and Fiber Stretchers

Fiber-optic phase shifters or fiber stretchers are used to finely adjust the optical phase and delay time.

Different modules produce a phase shift of up to 15 pi and 75 pi. The fiber stretcher produces an optical delay line of up to a maximum of 3 mm.

TDC Fiber Coils

Compact time delay coils (TDCs) are precision-wound fiber coils that are available at different lengths from 10 m to 4 km. They provide a defined delay.

These fiber coils are available both as OEM versions and in a compact housing.