Fiber Optics and Optical Communication

Optical single sideband modulation radio over fiber system by using a fiber-Bragg-grating-based acousto-optic filter

[+] Author Affiliations
Song Gao, Li Pei, Zhuoxuan Li, Chao Liu, Yiqun Wang, Sijun Weng

Beijing Jiaotong University, Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing 100044, China

Opt. Eng. 52(3), 035001 (Mar 04, 2013). doi:10.1117/1.OE.52.3.035001
History: Received November 13, 2012; Revised January 28, 2013; Accepted February 19, 2013
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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 31.18dBm at BER of 109 with 30 km long SMF.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Song Gao ; Li Pei ; Zhuoxuan Li ; Chao Liu ; Yiqun Wang, et al.
"Optical single sideband modulation radio over fiber system by using a fiber-Bragg-grating-based acousto-optic filter", Opt. Eng. 52(3), 035001 (Mar 04, 2013). ; http://dx.doi.org/10.1117/1.OE.52.3.035001


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