Method and apparatus for producing depolarized light

Details Method and apparatus for producing depolarized light Method and apparatus for producing depolarized light

2006-08-08

2006-08-08

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

Polarization without modulation

C359S494010, C359S490020

Reexamination Certificate

active

07088878

ABSTRACT:
A method and apparatus for producing depolarized light that is useful in forming interrogation signals for an optical sensor array and demodulator having reduced polarization-induced fading and phase noise. The depolarized light is produced by splitting a light beam, delaying a first orthogonal component of the light beam with respect to a second orthogonal component of the light beam using a predefined delay, while maintaining the polarization of the first orthogonal component and the polarization of the second orthogonal component. The delayed light beams are combined to produce a depolarized light beam by selecting a predefined delay that causes an interference signal having a delay equal to the predefined delay to be suppressed during a demodulation process.

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