Miniature Variable Optical Delay Line
The VDL-004 manual variable optical delay line is a small, short range delay line that allows a user to adjust the delay to a desired position and then lock it in place.
The VDL-004 is a fiber coupled delay line with the delay adjustment path in free space. The delay is adjusted by manually turning a dial on one end of the device, and the position is read from a scale on the front. The device includes a locking screw to lock the position setting. This device offers continuous control with high precision, zero backlash, and good thermal stability. Convenient mounting brackets allow mounting in any orientation, as well as easy integration of multiple units on a base plate to form an array.
The delay line is available with either single mode or PM fiber pigtails.
- Zero backlash
- Thermally stable
- Position locking mechanism
- Can be mounted in any orientation
Center wavelengths (λc)
SM, single pass: 1310/1550 dual window, 1060, or 840nm
SM, double pass: 1310 or 1550nm
PM, single pass: 1310, 1550, 1060, or 840nm
Wavelength range λc±50nm Optical delay range Single-pass: 130 ps (40 mm)
Double-pass: 260 ps
Optical delay resolution Continuous adjustment
3.34 ps (1mm) per full turn
Delay temperature stability (0.52+0.008*delay) µm/°C
where “delay” = optical delay in mm
Delay repeatability <20 µm Zero point delay offset 230 ps, (excluding caps, boots, and fiber pigtails) IL <0.8 dB, excluding connectors IL variation over delay range <0.4 dB
For full specifications, please download the data sheet.