Method and apparatus for receiving light with a modulated polari

Details Method and apparatus for receiving light with a modulated polari Method and apparatus for receiving light with a modulated polari

1994-12-06

1996-03-05

Lee, John D.

Optical waveguides

Polarization without modulation

385 4, 385 15, 359303, G02B 6126

Patent

active

054974372

ABSTRACT:
There is provided a method for modulating the polarization of light that allows detection of any modulated output regardless if the optical analyzers are rigidly held in place. According to a first aspect of the invention, a method for receiving light with a modulated polarization comprises steps of dividing the light being propagated through an optical fiber 1 with a polarization modulated in accordance with a modulation signal into three branched beams, causing one of the branched beams of light with a modulated polarization to pass through a .pi./2 phase corrector 2 and a first optical analyzer 3a and causing the remaining branched beams of light to respectively pass through second and third optical analyzers 3b and 3c without passing through any .pi./2 phase correctors before in order to receive light with a modualted intensity from the optical analyzers 3a, 3b and 3c. According to a second aspect of the invention, an apparatus for receiving light with a modulated plane is provided, said second optical analyzer 3b and said third optical analyzer 3c forming an angle of 49.degree. therebetween.

REFERENCES:
patent: 5136599 (1992-08-01), Wilcox
patent: 5361270 (1994-11-01), Heismann

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