In-line Mach-Zehnder interferometer composed of microtaper and long-period grating in all-solid photonic bandgap fiber

Journal Article · Mon Oct 01 00:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4756894· OSTI ID:22080469

Zhifang, Wu ^[1]; Yange, Liu; Zhi, Wang; Tingting, Han; Shuo, Li ^[1]; Meng, Jiang; Ping Shum, Perry ^[2]; Quyen Dinh, Xuan ^[3]

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1. Key Laboratory of Optical Information and Technology, Ministry of Education and Institute of Modern Optics, Nankai University, Tianjin 300071 (China)
2. OPTIMUS, School of Electrical and Electronics Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 637553 (Singapore)
3. CINTRA CNRS/NTU/THALES, UMI 3288, Research Techno Plaza, 50 Nanyang Drive, Border X Block, Level 6, Singapore 637553 (Singapore)

We report a compact in-line Mach-Zehnder interferometer combining a microtaper with a long-period grating (LPG) in a section of all-solid photonic bandgap fiber. Theoretical and experimental investigations reveal that the interferometer works from the interference between the fundamental core mode and the LP{sub 01} cladding supermodes. The mechanism underlying the mode coupling caused by the microtaper can be attributed to a bandgap-shifting as the fiber diameter is abruptly scaled down. In addition, the interferometer designed to strengthen the coupling ratio of the long-period grating has a promising practical application in the simultaneous measurement of curvature and temperature.

• OSTI ID: 22080469
• Journal Information: Applied Physics Letters, Vol. 101, Issue 14; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CLADDING
COUPLING
DIFFRACTION GRATINGS
INTERFERENCE
MACH-ZEHNDER INTERFEROMETER
SOLIDS
TEMPERATURE MEASUREMENT