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Conference Paper: Enhanced supercontinuum generation by minute continuous wave seed

TitleEnhanced supercontinuum generation by minute continuous wave seed
Authors
KeywordsNonlinear optics
Supercontinuum generation
Issue Date2011
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml
Citation
SPIE Photonics West 2011, San Francisco, California, USA, 22-27 February 2011. In Proceedings of SPIE, 2011, v. 7917, p. 79170X:1-79170X: 7 How to Cite?
AbstractIt is well-known that the properties of the supercontinuum (SC) radiation depend critically on the initial pumping conditions. For instance, if the SC is initiated by noise, namely modulation instability (MI), statistically rare "rogue waves" can be observed with sizable spectral broadening and intensity enhancement in SC. Interestingly, such rouge events can be actively controlled by adding an external weak pulse or by modulating the pump-pulse envelopes. In contrast, we here present that a simple triggering mechanism using an extremely weak continuous wave (CW) can also achieve such "rogue" enhancement. We experimentally demonstrated that a weak CW trigger (∼200,000×weaker than pump) can considerably broaden the SC bandwidth compared to the untriggered SC case (∼100 nm wider). Such enhancement was found to occur when the CW trigger's wavelength falls roughly within the modulation instability gain bandwidth. CW triggering also significantly alters the SC amplitude statistics, i.e. from extreme-value statistics in the untriggered SC to almost normal distribution in the triggered SC. Interferometric measurements also revealed the improvement in the SC coherence when the SC is CW-triggered. The enhanced SC by minute CW triggering only requires the CW-wavelength tuning for optimization and eliminates the necessity of high-precision (down to picoseconds) timing between the pump and the seed as in the pulse-seeding case. It thus offers a more convenient and practical approach to realize an enhanced and stable SC for many applications, especially in which real-time, ultrafast and single-shot spectroscopic measurements are essential. © 2011 SPIE.
DescriptionNonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X
Persistent Identifierhttp://hdl.handle.net/10722/140225
ISSN
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCheung, KKYen_HK
dc.contributor.authorZhang, Cen_HK
dc.contributor.authorZhou, Yen_HK
dc.contributor.authorWong, KKYen_HK
dc.contributor.authorTsia, KKen_HK
dc.date.accessioned2011-09-23T06:09:04Z-
dc.date.available2011-09-23T06:09:04Z-
dc.date.issued2011en_HK
dc.identifier.citationSPIE Photonics West 2011, San Francisco, California, USA, 22-27 February 2011. In Proceedings of SPIE, 2011, v. 7917, p. 79170X:1-79170X: 7en_HK
dc.identifier.issn0277-786Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/140225-
dc.descriptionNonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X-
dc.description.abstractIt is well-known that the properties of the supercontinuum (SC) radiation depend critically on the initial pumping conditions. For instance, if the SC is initiated by noise, namely modulation instability (MI), statistically rare "rogue waves" can be observed with sizable spectral broadening and intensity enhancement in SC. Interestingly, such rouge events can be actively controlled by adding an external weak pulse or by modulating the pump-pulse envelopes. In contrast, we here present that a simple triggering mechanism using an extremely weak continuous wave (CW) can also achieve such "rogue" enhancement. We experimentally demonstrated that a weak CW trigger (∼200,000×weaker than pump) can considerably broaden the SC bandwidth compared to the untriggered SC case (∼100 nm wider). Such enhancement was found to occur when the CW trigger's wavelength falls roughly within the modulation instability gain bandwidth. CW triggering also significantly alters the SC amplitude statistics, i.e. from extreme-value statistics in the untriggered SC to almost normal distribution in the triggered SC. Interferometric measurements also revealed the improvement in the SC coherence when the SC is CW-triggered. The enhanced SC by minute CW triggering only requires the CW-wavelength tuning for optimization and eliminates the necessity of high-precision (down to picoseconds) timing between the pump and the seed as in the pulse-seeding case. It thus offers a more convenient and practical approach to realize an enhanced and stable SC for many applications, especially in which real-time, ultrafast and single-shot spectroscopic measurements are essential. © 2011 SPIE.en_HK
dc.languageengen_US
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xmlen_HK
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_HK
dc.rightsProceedings of SPIE - International Society for Optical Engineering. Copyright © S P I E - International Society for Optical Engineering.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectNonlinear opticsen_HK
dc.subjectSupercontinuum generationen_HK
dc.titleEnhanced supercontinuum generation by minute continuous wave seeden_HK
dc.typeConference_Paperen_HK
dc.identifier.emailWong, KKY:kywong@eee.hku.hken_HK
dc.identifier.emailTsia, KK:tsia@hku.hken_HK
dc.identifier.authorityWong, KKY=rp00189en_HK
dc.identifier.authorityTsia, KK=rp01389en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1117/12.873137en_HK
dc.identifier.scopuseid_2-s2.0-79954602560en_HK
dc.identifier.hkuros192935en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79954602560&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume7917en_HK
dc.identifier.spage79170X:1en_US
dc.identifier.epage79170X:7en_US
dc.identifier.isiWOS:000297785600030-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridCheung, KKY=36893099100en_HK
dc.identifier.scopusauthoridZhang, C=36967711200en_HK
dc.identifier.scopusauthoridZhou, Y=36967644300en_HK
dc.identifier.scopusauthoridWong, KKY=36456599700en_HK
dc.identifier.scopusauthoridTsia, KK=6506659574en_HK

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