Method and apparatus for accurately fabricating a depolarizer

Details Method and apparatus for accurately fabricating a depolarizer Method and apparatus for accurately fabricating a depolarizer

G - Physics

02

B

G02B 5/30 (2006.01) G01C 19/72 (2006.01) G02B 6/26 (2006.01) G02B 6/34 (2006.01) G02B 6/42 (2006.01)

Patent

CA 2263001

Aligned birefringent fiber segments are reliably and efficiently rotated approximately 45~ relative to each other until the extinction ratio measurement at the output is approximately 0 dB, then birefringent fibers are fused. To determine the extinction ratio, a Wollaston analyzer is placed at the output of the birefringent fiber. Photodetectors placed on each output of the Wollaston analyzer, substantially simultaneously measure the output intensity of each propagation axis.

Dans le procédé selon la présente invention, on imprime un mouvement de rotation d'environ 45·, l'un par rapport à l'autre, à des segments alignés à fibre biréfringente jusqu'à ce que le rapport d'extinction à la sortie soit environ de 0 dB, puis les fibres biréfringentes sont réunies par fusion. Afin de déterminer le rapport d'extinction, on place un analyseur de Wollaston à la sortie de la fibre biréfringente. Des photodétecteurs placés sur chaque sortie de l'analyseur de Wollaston, mesurent sensiblement et simultanément l'intensité de sortie de chaque axe de la propagation.

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