Overwritten fiber Bragg grating and its application in an optical single sideband with carrier modulation radio over a fiber system

Tigang Ning; Jing Li; Pei Li; Fan Zhang; Qian Zhou; Xiaodong Wen; Chunhui Qi; Jingjing Zheng

doi:10.1117/1.3549224

1 March 2011 Overwritten fiber Bragg grating and its application in an optical single sideband with carrier modulation radio over a fiber system

Tigang Ning, Jing Li, Pei Li, Fan Zhang, Qian Zhou, Xiaodong Wen, Chunhui Qi, Jingjing Zheng

Author Affiliations +

Funded by: National Natural Science Foundation of China, Beijing Natural Science Foundation, Ph.D. Programs Foundation of Ministry of Education of China, Foundation of Ministry of Education of China, Foundation for the Returning Scholars, Fundamental Research Funds for the Central Universities

Optical Engineering, Vol. 50, Issue 3, 035001 (March 2011). https://doi.org/10.1117/1.3549224

Abstract

We present a prototype for optical single sideband (SSB) modulation with carrier (OSSB+C) by employing an overwritten fiber Bragg grating (FBG) is proposed and demonstrated. The grating is written using two different uniform phase masks of slight variation in the period. Then it is used in millimeter-wave SSB modulation scheme. Its operation principle can be concluded as the following two steps: (i) first, an intensity modulator double sideband (DSB) modulates the lightwave with millimeter-wave driving signals; (ii) then, the generated DSB modulation signals are reflected by the overwritten FBG. The overwritten FBG can reflect the carrier and the sideband simultaneously, resulting in two coherent subcarriers. Thus the conversion from DSB to OSSB+C can be easily achieved by using only one grating. Also, carrier-to-sideband ratio (CSR) can be optimized by using grating with different reflection depth. We demonstrate this scheme via simulation and successfully reduce signals' CSR from 14.44 to 1.25 dB.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Tigang Ning, Jing Li, Pei Li, Fan Zhang, Qian Zhou, Xiaodong Wen, Chunhui Qi, and Jingjing Zheng "Overwritten fiber Bragg grating and its application in an optical single sideband with carrier modulation radio over a fiber system," Optical Engineering 50(3), 035001 (1 March 2011). https://doi.org/10.1117/1.3549224

Published: 1 March 2011

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