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Optical Engineering

Optical single sideband modulation radio over fiber system by using a fiber-Bragg-grating-based acousto-optic filter
Author(s): Song Gao; Li Pei; Zhuoxuan Li; Chao Liu; Yiqun Wang; Sijun Weng
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Paper Abstract

An optical single sideband (OSSB) modulation radio over a fiber system, by using an acousto-optic filter (AOF), is proposed and demonstrated. In the AOF, a uniform fiber Bragg grating is etched and modulated by an axially propagating acoustic wave. Due to the acousto-optic superlattice modulation, two secondary reflection peaks, centered on the primary reflection peak, are generated. In the scheme, an optical double-sideband signal passes though the AOF to realize OSSB modulation. Because the reflect depth of the primary peak is much deeper than those of the secondary peaks, the carrier experiences higher attenuation than the upper sideband, which means the carrier-to-sideband ratio (CSR) can be optimized at the same time. We demonstrate this scheme via simulations, and successfully reduce the CSR from 9.73 to 2.9 dB. As a result, the receiving sensitivity improved from −23.43 to −31.18  dBm at BER of 10 −9 with 30 km long SMF.

Paper Details

Date Published: 4 March 2013
PDF: 5 pages
Opt. Eng. 52(3) 035001 doi: 10.1117/1.OE.52.3.035001
Published in: Optical Engineering Volume 52, Issue 3
Show Author Affiliations
Song Gao, Beijing Jiaotong Univ. (China)
Li Pei, Beijing Jiaotong Univ. (China)
Zhuoxuan Li, Beijing Jiaotong Univ. (China)
Chao Liu, Beijing Jiaotong Univ. (China)
Yiqun Wang, Beijing Jiaotong Univ. (China)
Sijun Weng, Beijing Jiaotong Univ. (China)

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