Technique utilizing stress-induced birefringence for...

Details Technique utilizing stress-induced birefringence for... Technique utilizing stress-induced birefringence for...

H - Electricity

04

B

H04B 10/12 (2006.01) H04B 10/135 (2006.01) H04B 10/17 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2119046

A technique for reducing signal degradation and fading within a long optical transmission system by minimizing polarization dependent hole-burning ("PDHB") through the cyclic stressing of a birefringent optical fiber to modulate the SOP of an optical signal launched into the transmission system. This effectively reduces the degree of polarization of the launched optical signal, without degrading the noise and dispersion characteristics of the signal. The modulation frequency of the SOP is chosen to ensure that 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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