Variation of Output Energy Due to FWM and Design of Optical Sampler Using Walk-off Free NOLM

Yuji MIYOSHI  Shinya WATANABE  Yudai OKUNAKA  Masaharu OHASHI  Hirokazu KUBOTA  

B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)   Vol.J97-B   No.12   pp.1171-1178
Publication Date: 2014/12/01
Online ISSN: 1881-0209
Type of Manuscript: PAPER
optical sampling,  nonlinear optical loop mirror,  four-wave mixing,  optical signal processing,  

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Recently, optical sampling techniques with high-time resolution and high-amplitude resolution is needed to detect optical communications using digital signal processing, multi-level modulation and Nyquist optical time-division multiplexing schemes. In this paper, we discuss the output energy variation phenomena of the optical sampling scheme using the walk-off free nonlinear optical loop mirror due to the four-wave mixing. The variation reduces amplitude resolution for the signal detection. Then, we discuss relationships among the optical fiber length, the wavelength of sampling pulse and time resolution with suppressing the variation by using numerical simulation based on split-step-Fourier-method.