The DEP series of passive depolarizers depolarize light sources to an output DOP <5%. A standard configuration can be used for light sources with coherence lengths less than 10 meters, but custom versions can be made for specific light sources.

Product Description

Depolarizers function by introducing a differential delay between the orthogonal polarization components that is longer than the coherence length of the light, to remove the phase relationship between the two polarization components. Different structures can be used depending on the requirements of the application.

  • Key Features
    • Low output DOP <5%
    • Customizable for different wavelengths and coherence lengths
    • Passive device- no power source required
    • Low IL
    • Compact
  • Specifications
    Center wavelength 1310 or 1550 nm standard, others available
    Operating wavelength range ±50 nm
    Output DOP <5%
    Coherence length of light source DEP-002: 0 to 30 mm (for broadband sources)
    DEP-003: 0 to 300 m (for narrowband sources)
    IL1 <1.4 dB (1.0 dB typical), excluding connectors
    Fiber type2

    Input: PM Panda fiber

    Output: SM


    1. For DEP-003 with 10 m coherence length.
    2. For DEP-003. DEP-002 is typically all PM fiber, but is designed to connect to SM fiber on both input and output sides.


    For full specifications, please download the data sheet.

  • Documentation

Solutions and Applications

A depolarizer is useful to neutralize polarization dependence in a system. Applications include fiber sensor and communication systems.

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