phase modulator

Fiber Phase Modulator/Shifter

The FPS-003 all fiber phase shifter/modulator combines a wide modulation bandwidth (up to 60 kHz) with low half-wave voltages to create a long-range device that can be driven by standard function generators.

Product Description

The FPS-003 is a small, piezo-driven phase shifter that works by stretching a length of fiber. Like other FPS phase shifters, it employs all fiber construction and has low insertion loss and back reflection. It has a low half- wave voltage and a higher frequency range and resonance frequency than the FPS-002.

  • Key Features
    • Wide frequency range (0-60 kHz)
    • Small half-wave voltage
    • Low IL, PDL, and residual amplitude modulation
    • Compact
  • Specifications
    Frequency range 0-60 kHz
    Total phase shift range (500 Hz) >55π (1550nm)
    Half-wave voltage (500 Hz) 1-3V typical
    Resonance frequency 36-39 kHz typical
    Half-wave voltage (resonance) <150 mV typical
    Fiber type 1310/1550nm: Corning ClearCurve ZBL or equiv.
    1060nm: 980-1550nm fiber with MFD 5μm at 980nm
    780nm: Nufern 780HP or equiv.
    IL <0.5 dB (at 1550nm, excluding connectors)
    PDL <0.05 dB (at 1550nm, excluding connectors)
    Residual amplitude modulation ±0.01 dB (1550nm)
    Total fiber length 500±10 cm

    For full specifications, please download the data sheet.

  • Documentation

Solutions and Applications

The FPS-003 is useful for phase shifts of up to several tens of π at frequencies up to 60 kHz. Especially when used at resonance, the Vπ is very small, so it can be driven by a function generator. It can be used for fine adjustment or to add a dither in interferometric applications.

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