| 摘要 |
<p>PURPOSE:To reduce the loss of an optical power with high precision and to easily and exactly perform assembling by making a core diameter and the numbers of aperture of light receiving side optical fiber larger than those of light transmitting side. CONSTITUTION:The light from a light source 10 is allowed to pass by a sensor part 15 consisting of a polarizer 3, Faraday element 4 and analyser 5 through a light transmitting side optical fiber 16 and light transmitting side lens 12. The light is then converged at a light receiving side lens 13 and made incident on a light receiving side optical fiber 17, and thereafter, received at a detector 7. At this time, by making the core diameter and the number of aperture of the light receiving side optical fiber 17 larger than those of the light transmission side optical fiber 16, it is possible to reduce the loss of the optical power even if the optical fiber 17 slightly deviates in the direction of an optical axis or a fiber terminal surface tilts slightly.</p> |
