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Designing of π-phase-shifted fibre Bragg grating with the limit linewidth of the transmission peak

WEN-QING MAN1,* , CHENG-YUN ZHANG1, JUN PENG1, QING-PING HE1

Affiliation

  1. School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, PR China

Abstract

The π-phase-shifted fibre Bragg gratings (π-PS-FBG) with the limit linewidth of the transmission peak is numerically investigated and designed. The investigation is divided into two scenarios. In the first scenario, the length of π-PS-FBG is 25 mm, when the index change of π-PS-FBG increases from 1.8×10-4 to 5.4×10-4, the linewidth of the transmission peak of π-PS-FBG decreases from 2 MHz to 0.17 Hz. In the second scenario, the index change of π-PS-FBG is 2×10-3, when the length of π-PS-FBG increases from 3 mm to 6.8 mm, the linewidth of the transmission peak of π-PS-FBG decreases from 1.2 MHz to 0.56 Hz. The numerical results indicate that the limit linewidth of the transmission peak of the designed π-PS-FBG is 0.17 Hz and 0.56 Hz, respectively..

Keywords

Phase-shifted fibre Bragg gratings, Limit linewidth, Transmission peak.

Submitted at: May 9, 2023
Accepted at: April 15, 2025

Citation

WEN-QING MAN, CHENG-YUN ZHANG, JUN PENG, QING-PING HE, Designing of π-phase-shifted fibre Bragg grating with the limit linewidth of the transmission peak, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 3-4, pp. 107-112 (2025)