Combined Microfiber Knot Resonator and Focused Ion Beam-Milled Mach-Zehnder Interferometer for Refractive Index Measurement

• Type: Article in International Conference Proceedings Book
• Date: 2017

Authors

Gomes, AD (Author) Other; Andre, RM (Author) Other; Warren Smith, SC (Author) Other; Dellith, J (Author) Other; Becker, M (Author) Other; Rothhardt, M (Author) Other; Frazao, O (Author) FCUP

Conference proceedings International

Title: 2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS)

25th International Conference on Optical Fibre Sensors (OFS)

SOUTH KOREA, APR 24-28, 2017

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Other information

Authenticus ID: P-00M-T1B

DOI: 10.1117/12.2265387

Abstract (EN): A Mach-Zehnder interferometer was created from a cavity milled in the taper region next to a microfiber knot resonator. A focused ion beam was used to mill the cavity with 47.8 mu m in length. The microfiber knot resonator was created from an 11 mu m diameter taper, produced using a filament fusion splicer. After milling the cavity, the microfiber knot resonator spectrum is still visible. The final response of the presented sensor is a microfiber knot resonator spectrum modulated by the Mach-Zehnder interference spectrum. A preliminary result of -8935 +/- 108 nm/RIU was obtained for the refractive index sensitivity of the cavity component in a refractive index range of n = 1.333 to 1.341. Simultaneous measurement of refractive index and temperature using this combined structure is a future goal.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4