Apparatus and method utilizing a rotating waveplate for reducing

Details Apparatus and method utilizing a rotating waveplate for reducing Apparatus and method utilizing a rotating waveplate for reducing

1993-04-30

1994-05-03

Healy, Brian

Optical waveguides

With optical coupler

Input/output coupler

385 25, 385 31, 385 39, 385147, 359181, 359188, 359246, 359333, 359337, 359339, 372 27, 372 6, G02B 610, G02B 530, H01S 310

Patent

active

053095359

ABSTRACT:
A technique for reducing signal degradation and fading within a long optical transmission by utilizing a rotating waveplate arrangement to rotate the SOP of an optical signal launched into the transmission system, and thereby minimize polarization dependent hole-burning ("PDHB"). This effectively reduces the degree of polarization of the launched optical signal, without degrading the noise and dispersion characteristics of the signal. The rate of waveplate rotation is chosen to ensure that the SOP of the launched signal does not remain at a particular SOP long enough to anisotropically saturate any optical amplifier employed within the transmission system, and give rise to PDHB.

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