POLARIZED PLANE MODULATION LIGHT RECEIVING METHOD AND POLARIZED PLANE MODULATION LIGHT RECEIVER USED THEREFOR

摘要

PURPOSE:To obtain the polarized plane modulation light receiver detecting a modulation output without fail even when an analyzer is fixed. CONSTITUTION:A polarized plane modulation light is demultiplexed into three by demultiplexers 5a, 5b, the one polarized plane modulation light is given to a 1st analyzer 3a through a polarized wave reservation fiber 2 with the length at which a phase difference of two components of the one polarized plane modulation light reserved in the fiber is deviated by (2m-1)Xpi/2 (m is a positive integer) and the other two polarized plane modulation lights are given to 2nd and 3rd analyzers 3b, 3c not through the polarized wave reservation fiber. which receive the intensity modulation light passing through each analyzer Further, the major axis direction of the polarized wave reservation fiber and the 1st analyzer are arranged at an angle difference of 45 deg. and the 2nd and 3rd analyzers are arranged at an angle difference of 45 deg..