| Novel ultra-wideband (UWB) photonic generation through photodetection and cross-absorption modulation in a single electroabsorption modulator. | |
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MedLine Citation:
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PMID: 20389347 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We propose and demonstrate, by proof of concept, a novel method of ultra-wide band (UWB) photonic generation using photodetection and cross-absorption modulation (XAM) of multiple quantum wells (MQW) in a single short-terminated electroabsorption modulator (SEAM). As an optical pump pulse excite the MQWs of SEAM waveguide, the probe light pulse with the same polarity can be generated through XAM, simultaneously creating photocurrent pulse propagating along the waveguide. Using the short termination of SEAM accompanied by the delayed microwave line, the photocurrent pulse can be reversed in polarity and re-modulated the waveguide, forming a monocycle UWB optical pulse. An 89 ps cycle of monocycle pulse with 114% fractional bandwidth is obtained, where the electrical power spectrum centered at 4 GHz of frequency ranges from 0.1 GHz to 8 GHz for -10 dB drops. Meanwhile, the generation processing is also confirmed by observing the same cycle of monocycle electrical pulse from the photodetection of SEAM. The whole optical processing is performed inside a compact semiconductor device, suggesting the optoelectronic integration template has a potential for the application of UWB photonic generation. |
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Authors:
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Tsu-Hsiu Wu; Jui-pin Wu; Yi-Jen Chiu |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Optics express Volume: 18 ISSN: 1094-4087 ISO Abbreviation: Opt Express Publication Date: 2010 Feb |
Date Detail:
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Created Date: 2010-04-14 Completed Date: 2010-07-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: United States |
Other Details:
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Languages: eng Pagination: 3379-84 Citation Subset: IM |
Affiliation:
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Institute of Electro-Optical Engineering and Department of Photonics, Semiconductor Technology Research Development Center, National Sun Yat-Sen University, 70 Lien-Hai Rd. Kaohsiung 80424, Taiwan, ROC. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Electronics
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instrumentation* Lighting / instrumentation* Neodymium Photometry / instrumentation* Photons Transducers* |
| Chemical | |
Reg. No./Substance:
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7440-00-8/Neodymium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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