Observing mode-dependent wavelength-to-time mapping in few-mode fibers using a single-photon detector array

dc.bibliographicCitation.firstPage61303eng
dc.bibliographicCitation.issue6eng
dc.bibliographicCitation.journalTitleAPL Photonicseng
dc.bibliographicCitation.volume5eng
dc.contributor.authorChandrasekharan, Harikumar K.
dc.contributor.authorEhrlich, Katjana
dc.contributor.authorTanner, Michael G.
dc.contributor.authorHaynes, Dionne M.
dc.contributor.authorMukherjee, Sebabrata
dc.contributor.authorBirks, Tim A.
dc.contributor.authorThomson, Robert R.
dc.date.accessioned2021-07-20T06:07:01Z
dc.date.available2021-07-20T06:07:01Z
dc.date.issued2020
dc.description.abstractWavelength-to-time mapping (WTM)—stretching ultrashort optical pulses in a dispersive medium such that the instantaneous frequency becomes time-dependent—is usually performed using a single-mode fiber. In a number of applications, such as time-stretch imaging (TSI), the use of this single-mode fiber during WTM limits the achievable sampling rate and the imaging quality. Multimode fiber based WTM is a potential route to overcome this challenge and project a more diverse range of light patterns. Here, we demonstrate the use of a twodimensional single-photon avalanche diode (SPAD) array to image, in a time-correlated single-photon counting (TCSPC) manner, the time- and wavelength-dependent arrival of different spatial modes in a few-mode fiber. We then use a TCSPC spectrometer with a onedimensional SPAD array to record and calibrate the wavelength-dependent and mode-dependent WTM processes. The direct measurement of the WTM of the spatial modes opens a convenient route to estimate group velocity dispersion, differential mode delay, and the effective refractive index of different spatial modes. This is applicable to TSI and ultrafast optical imaging, as well as broader areas such as telecommunications.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/6274
dc.identifier.urihttps://doi.org/10.34657/5321
dc.language.isoengeng
dc.publisherMelville, NY : AIP Publishingeng
dc.relation.doihttps://doi.org/10.1063/5.0006983
dc.relation.essn2378-0967
dc.rights.licenseCC BY 4.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/eng
dc.subject.ddc530eng
dc.subject.otherWavelength-to-time mapping (WTM)eng
dc.subject.othertime-stretch imaging (TSI)eng
dc.subject.othersingle-photon avalanche diode (SPAD)eng
dc.subject.othertime-correlated single-photon counting (TCSPC)eng
dc.titleObserving mode-dependent wavelength-to-time mapping in few-mode fibers using a single-photon detector arrayeng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccesseng
wgl.contributorAIPeng
wgl.subjectPhysikeng
wgl.typeZeitschriftenartikeleng
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