Method for manufacturing fiber Mach-Zehnder interferometer

• Main Authors: LI BENYE, YANG JINPENG, WANG SUMEI, JIANG LAN, WANG MENGMENG
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2011
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention relates to a method for manufacturing a fiber Mach-Zehnder interferometer and belongs to the field of optical sensor manufacturing. The method comprises the following steps of: making two fusion-connection points on a common single mode fiber at a distance of 5 mm to 60mm by using a fiber fusion splicer; allowing part of light transmitted in a fiber core to enter a fiber cladding when the light passes through the first fusion-connection point; allowing the light in the cladding to couple and return to the core of the fiber when the light passes through the second fusion-connection point; and allowing the two beams of light to generate a certain phase difference by means of the difference of the refractive indexes of the cladding and the fiber core so as to generate interference. When the interferometer manufactured by the method is used as the sensor, the change of the interference conditions with the change of surroundings such as the refractive index and the temperature cause offsets of interf