An All-Optical Transformer From Differential NRZ Data to Ultra-Wideband Pulse Stream
2011 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 23, no 9, 579-581 p.Article in journal (Refereed) Published
We propose and experimentally demonstrate a compact and cost-effective scheme based on a fiber Sagnac structure to realize real time conversion from differential nonreturn-to-zero (NRZ) data to ultra-wideband (UWB) pulse stream. The proposed conversion system for the UWB signal generation consists of a single-wavelength laser, a phase modulator, several polarization controllers, and optical couplers. Due to the optical interference between the two phase-modulated light waves with slight phase difference in the Sagnac loop, two sharp optical pulses with opposite polarities are obtained. With proper time delay, a UWB monocycle pulse stream is generated from the original differential NRZ data. Our proposed method gives a reliable, easy, and low-cost transformer from differential NRZ signal to UWB pulse stream, and no high-speed arbitrary waveform generator (AWG) is required in this all-optical transformer.
Place, publisher, year, edition, pages
2011. Vol. 23, no 9, 579-581 p.
Data conversion, microwave photonics, monocycle, Sagnac structure, ultra-wideband (UWB) pulse stream
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-33234DOI: 10.1109/LPT.2011.2117415ISI: 000289478900006ScopusID: 2-s2.0-79954433871OAI: oai:DiVA.org:kth-33234DiVA: diva2:415738
QC 201105092011-05-092011-05-022013-11-19Bibliographically approved