NDLI: Simultaneous Wavelength and Format Conversions Based on the Polarization-Insensitive FWM in Free-Space Optical Communication Network

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Simultaneous Wavelength and Format Conversions Based on the Polarization-Insensitive FWM in Free-Space Optical Communication Network

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Tao Duan Xin Xu Xiaoping Xie Xinning Huang Yulong Suh Hui Hu
Abstract	Free-space optical (FSO) network is an effective way to enhance the interoperability and improve the resource utilization of the FSO communication systems. Since the structure is relatively simple and the nodes are not so many, wavelength conversion-based optical circuit switching (WC-OCS) is an appropriate candidate for the FSO network to solve the blocking problem. Meanwhile, format conversion to lower the data rate is also necessary in case the atmospheric channel deteriorates. In this paper, we construct a 3-node FSO network and experimentally investigate the feasibility of simultaneous WC-OCS and format conversion based on straight-lined single-pump four-wave mixing (FWM) process. The biterror-ratio (BER) results of the on-off key, binary phase-shift keying (BPSK), and quadrature phase-shift keying (QPSK) signals show that comparing to the corresponding back-to-back (B2B) transmission at the reference BER level of $10^{-7}$, power penalties caused by WC-OCS are less than 1-dB for all the three formats. In the format conversion experiment from QPSK to BPSK, the power penalties, comparing to the original BPSK signal after B2B and WCOCS transmission, are also less than 1 dB at the $10^{-7}$ reference BER level. Consequently the feasibility and practicability of the FWM-based optical signal processing at FSO network nodes are experimentally validated.
Related Links	https://ieeexplore.ieee.org/document/8581456/
e-ISSN	19430655
DOI	10.1109/JPHOT.2018.2888621
Journal	IEEE Photonics Journal
Issue Number	1
Volume Number	11
Language	English
Publisher	IEEE
Publisher Date	2019-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Applied Optics. Photonics Optics. Light Format Conversion Four-wave Mixing (fwm) Free-space Optical Network Wavelength Conversion-based Optical Circuit Switching (wc-ocs)
Content Type	Text
Resource Type	Article

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