TEMPERATURE COMPENSATION ELEMENT AND OPTICAL SENSOR SYSTEM

• Main Authors: HIRATA YUKIHISA, SASAKI KINICHI, UMEZAKI HIROYUKI, TAKAHASHI MASAO
• Format: Patent
• Language: English; Japanese
• Published: 08.08.2016
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TESTING

PROBLEM TO BE SOLVED: To provide a temperature compensation element and an optical sensor system capable of effectively compensating the temperature.SOLUTION: A temperature compensation element 1 includes: a polarization plane maintaining fiber 2; a protective layer 3 covering the polarization plane maintaining fiber 2; and a stress imparting part 4 that applies a stress to the polarization plane maintaining fiber 2. The stress imparting part 4 is constituted of a metal thin film layer 5 and covers a part of the polarization plane maintaining fiber 2. A predetermined part of the polarization plane maintaining fiber 2 in a light propagation direction is not covered by the protective layer 3. The metal thin film layer 5 covers a part of the polarization plane maintaining fiber 2 not covered by the protective layer 3. The stress imparting part 4 applies an anisotropic stress to the optical fiber according to a temperature change on an external unit which is optically connected to the optical fiber.SELECTED DRAWING: Figure 1 【課題】効果的に温度補償を行うことができる温度補償素子及び光センサシステムを提供する。【解決手段】温度補償素子１は、偏波面保持ファイバ２、偏波面保持ファイバ２を被覆する保護層３、及び、偏波面保持ファイバ２に応力を印加する応力付与部４を有する。応力付与部４は、金属薄膜層５によって構成され、偏波面保持ファイバ２の一部を被覆している。偏波面保持ファイバ２は、光伝播方向の所定の区間において保護層３によって被覆されていない。金属薄膜層５は、保護層３によって被覆されていない区間の偏波面保持ファイバ２を被覆している。応力付与部４は、光ファイバに光学的に接続されている外部装置の温度変化に応じて、前記光ファイバに非等方的な応力を印加する。【選択図】図１