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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 12 — Jun. 11, 2007
  • pp: 7774–7785

All-optical modulation format conversion from NRZ-OOK to RZ-QPSK using parallel SOA-MZI OOK/BPSK converters

Ken Mishina, Suresh M. Nissanka, Akihiro Maruta, Shunsuke Mitani, Kazuyuki Ishida, Katsuhiro Shimizu, Tatsuo Hatta, and Ken-ichi Kitayama  »View Author Affiliations


Optics Express, Vol. 15, Issue 12, pp. 7774-7785 (2007)
http://dx.doi.org/10.1364/OE.15.007774


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Abstract

A novel all-optical modulation format conversion from non-return-to-zero on-off-keying (NRZ-OOK) to return-to-zero quadrature-phase-shift-keying (RZ-QPSK) is proposed and experimentally demonstrated. The proposed format conversion scheme is based on parallel Mach-Zehnder interferometric (MZI) OOK/binary-PSK (BPSK) converters, consisting of integrated semiconductor optical amplifiers (SOAs). We experimentally demonstrate that in both decoded channels of the converted RZ-QPSK signal bit error rate (BER) curves show almost the same receiver sensitivity at a symbol-rate of 10.7 Gsymbol/s. In addition, a reasonable dispersion tolerance of the converted signal up to +295 ps/nm is observed. The numerical simulation based upon carrier rate equation verifies the experimental results.

© 2007 Optical Society of America

OCIS Codes
(060.5060) Fiber optics and optical communications : Phase modulation
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 12, 2007
Revised Manuscript: May 24, 2007
Manuscript Accepted: June 4, 2007
Published: June 8, 2007

Citation
Ken Mishina, Suresh M. Nissanka, Akihiro Maruta, Shunsuke Mitani, Kazuyuki Ishida, Katsuhiro Shimizu, Tatsuo Hatta, and Ken-ichi Kitayama, "All-optical modulation format conversion from NRZ-OOK to RZ-QPSK using parallel SOA-MZI OOK/BPSK converters," Opt. Express 15, 7774-7785 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-12-7774


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