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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 24, Iss. 10 — Oct. 1, 2006
  • pp: 3751–3758

NRZ-OOK-to-RZ-BPSK Modulation-Format Conversion Using SOA-MZI Wavelength Converter

Ken Mishina, Akihiro Maruta, Shunsuke Mitani, Toshiharu Miyahara, Kazuyuki Ishida, Katsuhiro Shimizu, Tatsuo Hatta, Kuniaki Motoshima, and Ken-ichi Kitayama

Journal of Lightwave Technology, Vol. 24, Issue 10, pp. 3751-3758 (2006)


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Abstract

A novel all-optical modulation-format conversion from nonreturn-to-zero on–off keying (NRZ-OOK) to return-to-zero binary phase-shift keying (RZ-BPSK) is proposed. A Mach–Zehnder interferometric (MZI) wavelength converter consisting of integrated semiconductor optical amplifiers (SOAs) is utilized to implement the proposed format conversion. Error-free operation at a bit rate of 10.7 Gb/s is experimentally demonstrated in order to show the feasibility of the proposed scheme. The received sensitivity of the converted signal is improved by 2.9 dB compared with a back-to-back NRZ-OOK signal at BER = 10<sup>-9</sup>. In addition, a reasonable dispersion tolerance of the converted signal up to ±500 ps/nm is observed. The numerical simulation based upon the carrier-rate equation verifies the experimental results.

© 2006 IEEE

Citation
Ken Mishina, Akihiro Maruta, Shunsuke Mitani, Toshiharu Miyahara, Kazuyuki Ishida, Katsuhiro Shimizu, Tatsuo Hatta, Kuniaki Motoshima, and Ken-ichi Kitayama, "NRZ-OOK-to-RZ-BPSK Modulation-Format Conversion Using SOA-MZI Wavelength Converter," J. Lightwave Technol. 24, 3751-3758 (2006)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-24-10-3751

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