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All-optical format conversions from NRZ to BPSK and QPSK based on nonlinear responses in silicon microring resonators
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
2007 (English)In: Optics Express, ISSN 1094-4087, Vol. 15, no 21, 14275-14282 p.Article in journal (Refereed) Published
Abstract [en]

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 similar to 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.

Place, publisher, year, edition, pages
2007. Vol. 15, no 21, 14275-14282 p.
Keyword [en]
self-phase modulation, wavelength converter, 2-photon absorption, loop-mirror, wave-guides, rz, soa, shift, transmission, dpsk
URN: urn:nbn:se:kth:diva-17129ISI: 000251223100088ScopusID: 2-s2.0-35348939137OAI: diva2:335172
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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