All-optical format conversions from NRZ to BPSK and QPSK based on nonlinear responses in silicon microring resonators
2007 (English)In: Optics Express, ISSN 1094-4087, Vol. 15, no 21, 14275-14282 p.Article in journal (Refereed) Published
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.
self-phase modulation, wavelength converter, 2-photon absorption, loop-mirror, wave-guides, rz, soa, shift, transmission, dpsk
IdentifiersURN: urn:nbn:se:kth:diva-17129ISI: 000251223100088ScopusID: 2-s2.0-35348939137OAI: oai:DiVA.org:kth-17129DiVA: diva2:335172
QC 201005252010-08-052010-08-05Bibliographically approved