Femtosecond Laser Micromachining of Fabry-Perot Interferometers in Fused Silica for Refractive Index Sensing

• Type: Article in International Conference Proceedings Book
• Date: 2019

Authors

Maia, JM (Author) Other; Amorim, VA (Author) Other; Viveiros, D (Author) FCUP; Marques, PVS (Author) FCUP

Conference proceedings International

Title: FOURTH INTERNATIONAL CONFERENCE ON APPLICATIONS OF OPTICS AND PHOTONICS

4th International Conference on Applications of Optics and Photonics (AOP)

Univ Lisbon, Lisbon, PORTUGAL, MAY 31-JUN 04, 2019

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Other information

Authenticus ID: P-00R-8A7

DOI: 10.1117/12.2527302

Abstract (EN): A Fabry-Perot interferometer was fabricated inside a fused silica substrate through femtosecond laser micromachining. The influence of the waveguide's writing parameters on the measured signal's quality was studied for an interferometer with a 27-mu m wide cavity. Optimal signal-to-noise ratio and fringe visibility were obtained for waveguides written at 75 nJ and 50 mu m/s. The same device was characterized with different refractive index liquids, and a maximum sensitivity of 1181.4 +/- 23.6 nm/RIU was obtained in the index range of 1.2962 to 1.3828 (at 1550 nm) for the spectral order m = 46.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6