Bunimovich Stadium-Like Resonator for Randomized Fiber Laser Operation

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Silveira, B (Author) Other; Gomes, A (Author) Other; Becker, M (Author) Other; Schneidewind, H (Author) Other; Frazao, O (Author) FCUP

Journal

Title: Photonics

Vol. 5

Final page: 17

Publisher: MDPI

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00N-ZWB

DOI: 10.3390/photonics5030017

Abstract (EN): A silica resonator was demonstrated for random laser generation. The resonator consisted of a conventional microsphere fabricated in an optical fiber tip through electric arc discharge, and modifications to its geometry were carried out to create asymmetry inside the silica structure. The resulting Bunimovich stadium-like microsphere promotes multiple reflections with the boundaries, following the stochastic properties of dynamic billiards. The interference of the multiple scattered beams generates a random signal whose intensity was increased by sputter-coating the microstadium with a gold thin film. The random signal is amplified using an erbium-doped fiber amplifier (EDFA) in a ring cavity configuration with feedback, and lasing is identified as temporal and spectral random variations of the signal between consecutive measurements.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7