Experimental characterization of the spectra of etched long-period grating pairs

Jin-Fei Ding; A. Ping Zhang; Hong-Yan Fu

doi:10.1117/12.635985

3 December 2005 Experimental characterization of the spectra of etched long-period grating pairs

Jin-Fei Ding, A. Ping Zhang, Hong-Yan Fu

Proceedings Volume 6019, Passive Components and Fiber-based Devices II; 60193H (2005) https://doi.org/10.1117/12.635985
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China

Abstract

After an analysis of the spectral characteristics of the long-period grating (LPG) with decreasing the fiber cladding diameter, we experimentally investigated the spectra of etched LPG pairs (LPGPs) with ~3 dB transmissivity (as in-fiber M-Z interferometers). The evolutions of the transmission spectra were characterized as the cladding diameters were decreased by HF etching process. A shift of the stop-band of LPG and interference pattern of LPGP to longer wavelength was observed with the reduction of cladding diameter, in which that of higher order cladding mode induced a larger shift. The responses of the LPGs and LPGPs with different etching degrees to the change of the surrounding refractive-index were measured, and an increased sensitivity is observed in the experiment.

Citation Download Citation

Jin-Fei Ding, A. Ping Zhang, and Hong-Yan Fu "Experimental characterization of the spectra of etched long-period grating pairs", Proc. SPIE 6019, Passive Components and Fiber-based Devices II, 60193H (3 December 2005); https://doi.org/10.1117/12.635985

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