Photonic crystal fiber π-phase-shifted long-period gratings with wide bandpass and temperature insensitivity

Shijie Zheng; Yinian Zhu

doi:10.1117/1.OE.54.11.116101

2 November 2015 Photonic crystal fiber π-phase-shifted long-period gratings with wide bandpass and temperature insensitivity

Shijie Zheng, Yinian Zhu

Author Affiliations +

Optical Engineering, Vol. 54, Issue 11, 116101 (November 2015). https://doi.org/10.1117/1.OE.54.11.116101

Abstract

In order to solve for the mode intensity distributions in a photonic crystal fiber (PCF) cross section and the propagation constant for the design of fiber bandpass filters, we numerically analyze the modal distributions of the fundamental core mode and different cladding modes. Based on the simulation results, we also experimentally demonstrate a simple fabrication of bandpass filters inscribed on the PCF by inserting a π-phase shift in a 12-period long-period grating (LPG). Two rejection bands with greater than 18 dB isolation and an ultra-wide band of 85.3 nm are achieved. The phase-shifted PCF-LPGs are fabricated using a CO₂ laser with point-by-point focused pulses. The proposed fiber bandpass filter is compact and is not influenced by temperature effects.

Citation Download Citation

Shijie Zheng and Yinian Zhu "Photonic crystal fiber π-phase-shifted long-period gratings with wide bandpass and temperature insensitivity," Optical Engineering 54(11), 116101 (2 November 2015). https://doi.org/10.1117/1.OE.54.11.116101

Published: 2 November 2015

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