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Optical Engineering

Noise tolerance in optical waveguide circuits for recognition of optical 16 quadrature amplitude modulation codes
Author(s): Kensuke Inoshita; Yoshimitsu Hama; Hiroki Kishikawa; Nobuo Goto
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Paper 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 1.0×10−3 for the symbol rate of 2.5 GBaud was 14.5 and 27.0 dB for recognition from the minimum and maximum output, respectively.

Paper Details

Date Published: 15 December 2016
PDF: 8 pages
Opt. Eng. 55(12) 126105 doi: 10.1117/1.OE.55.12.126105
Published in: Optical Engineering Volume 55, Issue 12
Show Author Affiliations
Kensuke Inoshita, Tokushima Univ. (Japan)
Yoshimitsu Hama, Tokushima Univ. (Japan)
Hiroki Kishikawa, Tokushima Univ. (Japan)
Nobuo Goto, Tokushima Univ. (Japan)

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