Polarization-maintaining fiber system and method of manufacturin

Details Polarization-maintaining fiber system and method of manufacturin Polarization-maintaining fiber system and method of manufacturin

1983-09-26

1986-08-05

Sikes, William L.

350 9620, 350 9621, 350 9630, G02B 626

Patent

active

046039414

ABSTRACT:
In an optical fiber system comprising first and second polarization-maintaining fibers, a first orthogonal coordinate system of the first polarization-maintaining fiber is azimuthally rotated relative to a second orthogonal coordinate system of the second polarization-maintaining fiber by the use of an optical coupler by a preselected angle between 0.degree. and 90.degree., both exclusive. Preferably, the optical coupler is shorter than a beat length of each fiber and the preselected angle is equal to 45.degree.. The optical fiber system is applicable to an optical sensor for sensing a variable physical parameter. In the sensor, a light beam is incident onto one end of the first polarization-maintaining fiber so that a plane of polarization of the light beam is matched to one of those planes of the first polarization-maintaining fiber which are determined by the first orthogonal coordinate system. A third polarization-maintaining fiber is coupled through an additional optical coupler to the second polarization-maintaining fiber. The optical fiber system can be manufactured either by twisting and locally fusing a single polarization-maintaining fiber or by splicing together two polariation-maintaining fibers.

REFERENCES:
patent: 4405198 (1983-09-01), Taylor

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