Variable Optical Delay Line - Motor Driven

(0 to 2100ps, SM, MM, PM)
  • Single piece with USB interface
  • Wide delay range up to 2100ps
  • All wavelength
  • Low Cost
  • User-Friendly GUI (no manual needed)

Click 'Spec Sheet' for available configurations/part#


The MDTD Series Motor-driven Variable Optical Fiber Delay Lines provide precision optical delays of up to 2100 ps. It is a turn-key unit, coming with a wall plug power supply, a computer interface USB cable, and a user-friendly GUI software. The simple design consists of two fiber collimators and a movable reflector controlled by a precision step motor. Light from an input fiber collimator projects into free space and is collected by an output fiber collimator. The distance the light travels in free space is varied by a precision stage.

The device is conveniently controlled by a computer via a USB cable interface. A graphic control software is provided.


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 Parameter Min Typical Max Unit
 Operation Wavelength 400 1550 2000 nm
 Insertion Loss [1] 330ps 1.0 1.5 dB
600ps 1.0 1.8
1200ps 1.5 2.8
 Return Loss 45 dB
 PDL 0.2 dB
 Max Switching speed 30 mm/s
 Time Delay Range 330 600 1200 ps
 Resolution 8 fs
 Polarization Extinction Ratio [2] 18 22 25 dB
 Optical Power Handling 500 mW
 Durability (Life cycle) 107
 Operating Temperature 0 70 ºC
 Storage Temperature -40 85 ºC
 Fiber Type SM or PM
 Control Interface USB

[1]. Exclude connectors, Measured at 1550 nm

[2]. For PM version only