Lasers, Fiber Optics, and Communications

Noise tolerance in optical waveguide circuits for recognition of optical 16 quadrature amplitude modulation codes

[+] Author Affiliations
Kensuke Inoshita, Yoshimitsu Hama, Hiroki Kishikawa, Nobuo Goto

Tokushima University, Graduate School of Science and Technology, Department of Optical Science, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan

Opt. Eng. 55(12), 126105 (Dec 15, 2016). doi:10.1117/1.OE.55.12.126105
History: Received June 24, 2016; Accepted November 21, 2016
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Abstract.  In photonic label routers, various optical signal processing functions are required; these include optical label extraction, recognition of the label, optical switching and buffering controlled by signals based on the label information and network routing tables, and label rewriting. Among these functions, we focus on photonic label recognition. We have proposed two kinds of optical waveguide circuits to recognize 16 quadrature amplitude modulation codes, i.e., recognition from the minimum output port and from the maximum output port. The recognition function was theoretically analyzed and numerically simulated by finite-difference beam-propagation method. We discuss noise tolerance in the circuit and show numerically simulated results to evaluate bit-error-rate (BER) characteristics against optical signal-to-noise ratio (OSNR). The OSNR required to obtain a BER less than 1.0×103 for the symbol rate of 2.5 GBaud was 14.5 and 27.0 dB for recognition from the minimum and maximum output, respectively.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Kensuke Inoshita ; Yoshimitsu Hama ; Hiroki Kishikawa and Nobuo Goto
"Noise tolerance in optical waveguide circuits for recognition of optical 16 quadrature amplitude modulation codes", Opt. Eng. 55(12), 126105 (Dec 15, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.126105


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