Patent ID: 7454093
Filing Date: 2008-11-18
Classification: G02B

Abstract:
1. An optical module comprising: an enclosure; a light source enclosed in the enclosure; and a polarization-maintaining optical fiber coupled to the enclosure in an attitude of a predetermined rotation angle position around an optical axis with respect to the light source, wherein the predetermined rotation angle position is defined based on an intersection point between a first characteristic curve and a second characteristic curve, the first characteristic curve presenting values of extinction ratio for relative rotation angles, respectively, between the light source and the polarization-maintaining optical fiber in a condition where the polarization-maintaining optical fiber exhibits a maximum extinction ratio in response to application of a load when the polarization-maintaining optical fiber takes a specific attitude of a specific rotation angle position around the optical axis, the specific rotation angle position presenting the polarization-maintaining optical fiber exhibiting a maximum extinction ratio with no load applied, and the second characteristic curve presenting values of extinction ratio for relative rotation angles, respectively, between the light source and the polarization-maintaining optical fiber in a condition where the polarization-maintaining optical fiber exhibits a minimum extinction ratio in response to application of a load when the polarization-maintaining optical fiber takes the specific attitude of the specific rotation angle position around the optical axis.