Optical Delay Line by Luna Innovations

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The MDL-003 from Luna Innovations is a Motorized Variable Optical Delay Line that has a delay range of up to 100 ps (single-pass). It operates at a wavelength of 840 ± 50 nm, 1060 ± 50 nm & 1260 nm to 1650 nm in Single Mode operation, and 840 nm, 1060 nm, 1310 or 1550 ± 50 nm in Polarization Mode operation. This delay line has an optical delay resolution of 30 µm with an optical delay accuracy of ±40 µm for a single pass. It has an insertion loss of 1dB and a return loss of 55 dB. 

The MDL-003 has a polarization-dependent loss of 0.15 dB for single-mode fiber and an actuation speed of up to 50 ps/s. It has an optical damage power threshold of 100 mW and a minimum extinction ratio of 18 dB. This delay line has a 2-phase stepper motor and two position sensors for precise delay control. It is available in a compact and highly stable design that measures 50.8 x 35.56 x 13.97 mm and is ideal for integration in optical coherence tomography (OCT) systems, network equipment and test instruments for precision optical path length control or timing alignment.

Product Specifications

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Product Details

  • Part Number
  • Manufacturer
    Luna Innovations
  • Description
    840 nm to 1650 nm, Variable Optical Delay Line for Optical Fourier Spectrum Analysis


  • Applications
    Optical Coherence Tomography (OCT), Optical Fourier spectrum analysis, Optical interferometry, Delay generation and measurement, Optical time division multiplexing (OTDM), Fiber sensors

General Parameters

  • Operating Wavelength
    SM: 1260 to 1650 nm, 840 nm, 1060 nm, PM: 1310 nm, 1550 nm, 840 nm, 1060 nm
  • Configuration
    Fiber Coupled
  • Delay Range
    0 to 100 ps
  • Package Type
    Module with Connector
  • Delay Accuracy
    ±40 µm
  • Type
    Motorized Variable
  • Dimensions
    2 x 1.4 x 0.55 Inches
  • Extinction Ratio
    18 dB
  • Optical Power Handling
    100 mW(Damage Power)
  • Optical Return Loss
    55 dB
  • Polarization Dependent Loss
    0.15 dB
  • Insertion Loss
    1 dB


  • Operating Temperature display
    0 to 50 Degree C
  • Storage Temperature
    -20 to 60 Degree C

Fiber Parameters

  • Fiber Connectors
  • Fiber Type
    Single Mode / Polarization Maintaining

Technical Documents

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