Section 2. Overview
The FPS-002 is a high speed, long range phase shifter with a range of up to 65
π
and an
operating frequency range of 0 to 20 kHz. It was designed to have a low V
π
both at
resonance and off-resonance, so that it can be driven with a standard function generator
to achieve phase shifts of a few
π
, or with a high voltage driver for larger phase shifts.
The device is piezo driven, and the phase shift is achieved by stretching the fiber. Since
the complete optical path is in fiber, the insertion loss and back reflections are low, and
different types of fiber are available for different applications.
Figure 1 FPS-002 phase shifter
2.1
Electrical Interface
Electrical Interface: Ribbon cable with 4-pin connector
Electrical Connector: Molex WM9131-ND or equivalent
Electrical connector pinout:
Pin1
Pin 2
Pin 3
Pin 4
Pin Function
1 Positive
2
Not in use
3 Negative
4 Case
Pin 1 is marked with a triangle on the connector.
2.2
Optical Interface
The FPS-002 has 2 fiber pigtails for the input and output signals. Input and output are
interchangeable.
Document #: GP-IN-FPS-002-11
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