MACH-ZEHNDER INTERFEROMETER OPTICAL FIBER CAPABLE OF EFFECTIVELY REPRESENTING A MACH-ZEHNDER INTERFERENCE PROPERTY BY USING A SINGLE PAIR OPTICAL FIBER, AND A SENSOR THEREOF

摘要

PURPOSE: A Mach-Zehnder interferometer optical fiber and a sensor thereof are provided to efficiently detect the variation of various physical values by forming an optical fiber which represents a Mach-Zehnder interference property.;CONSTITUTION: An optical fiber comprises a cladding part surrounding a core part. A cavity part is included inside the optical fiber. The cavity part generates at least two optical paths which has phase difference by dividing light ray which is emitted to the optical fiber. The optical fiber is composed of a silica-based single mode optical fiber. The diameter of the cross section of the optical fiber is 110um-140um. The diameter of the cross section of the core part is 7um-150um. The rate of the refractive index of the core part and a cladding part to the light of the wave length of 1550nm is 1.2-1.6.;COPYRIGHT KIPO 2011