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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 21 — Oct. 17, 2007
  • pp: 14275–14282

All-optical format conversions from NRZ to BPSK and QPSK based on nonlinear responses in silicon microring resonators

Yuanyuan Lu, Fangfei Liu, Min Qiu, and Yikai Su  »View Author Affiliations

Optics Express, Vol. 15, Issue 21, pp. 14275-14282 (2007)

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We propose and numerically verify a novel scheme of all-optical format conversion from non-return-to-zero (NRZ) to binary phase-shift-keying (BPSK) at 160 Gb/s using cascaded microring resonators (CMRR) on a single silicon chip. The conversion is based on large phase shift and flattened intensity-response characteristics in the CMRR. A continuous-wave light experiences different phase shifts controlled by the power of an input NRZ signal with an ~8.8-dB extinction ratio, while maintaining approximately the constant intensity. All-optical format conversion from NRZ to quadrature phase-shift-keying (QPSK) is also demonstrated based on parallel NRZ/BPSK converters in a Mach-Zehnder interferometer structure.

© 2007 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(060.5060) Fiber optics and optical communications : Phase modulation
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(230.1150) Optical devices : All-optical devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 9, 2007
Revised Manuscript: September 19, 2007
Manuscript Accepted: September 25, 2007
Published: October 12, 2007

Yuanyuan Lu, Fangfei Liu, Min Qiu, and Yikai Su, "All-optical format conversions from NRZ to BPSK and QPSK based on nonlinear responses in silicon microring resonators," Opt. Express 15, 14275-14282 (2007)

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