Experimental Measurement of Supercontinuum Second Order Coherence

Närhi, Mikko; Korhonen, Minna; Turunen, Jari; Friberg, Ari T.; Genty, Goëry

doi:10.1364/cleo_si.2014.sw1i.3

Cited by 3 publications

(3 citation statements)

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“…CSD-another feature generally missing in the current techniques. Comparing with the existing CSD measurement techniques, we highlight that our technique is able to recover the CSD without separating the measurements of the coherent and quasi-stationary parts 39 51 .…”

Section: Discussionmentioning

confidence: 97%

Ultrafast measurements of optical spectral coherence by single-shot time-stretch interferometry

Wei

Ren

et al. 2016

Sci Rep

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The palette of laser technology has significantly been enriched by the innovations in ultrafast optical pulse generation. Our knowledge of the complex pulse dynamics, which is often highly nonlinear and stochastic in nature, is however limited by the scarcity of technologies that can measure fast variation/fluctuation of the spectral phase (or coherence) and amplitude in real-time, continuously. To achieve this goal, we demonstrate ultrafast interferometry enabled by optical time-stretch for real- time spectral coherence characterization with microsecond-resolution. Accessing the single-shot interferograms continuously, it further reveals the degree of second-order coherence, defined by the cross-spectral density function, at high speed-a capability absent in any existing spectroscopic measurement tools. As the technique can simultaneously measure both the high-speed variations of spectrally resolved coherence and intensity, time-stretch interferometry could create a new arena for ultrafast pulse characterization, especially favorable for probing and understanding the non-repetitive or stochastic dynamics in real-time.

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Section: Discussionmentioning

confidence: 97%

Ultrafast measurements of optical spectral coherence by single-shot time-stretch interferometry

Wei

Ren

et al. 2016

Sci Rep

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“…In these studies, the quantification of the coherence is typically realized utilizing the second-order (in fields) normalized degree of spectral coherence [10]. This description, however, only characterizes the shot-to-shot phase stability and a more complete characterization of SC coherence may be obtained using correlation functions of the second-order coherence theory of non-stationary light [14,15,24].…”

Section: Introductionmentioning

confidence: 99%

Interferometric autocorrelation measurements of supercontinuum based on two-photon absorption

et al. 2019

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We report on interferometric autocorrelation measurements of broadband supercontinuum light in the anomalous dispersion regime using two-photon absorption in a GaP photodetector. The method is simple, low-cost, and provides a direct measure of the second-order coherence properties, including quantitative information on the coherence time and average duration of the supercontinuum pulses as well as on the presence of temporally coherent sub-structures. We report measurements in regimes where the supercontinuum is coherent and incoherent. In the former case, the interferometric measurements are similar to what is observed for mode-locked laser pulses while in the latter case the interferometric measurements and coherence properties are shown to have characteristics similar to that of a stationary chaotic light source.

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“…The stability of SC has been studied quite extensively. Previous results have characterized it in terms of the radio-frequency noise [7], in terms of the pulse-to-pulse coherence |g 12 (1) | [8][9][10][11][12][13][14][15], in terms of the pulse-to-pulse fluctuation of spectral intensity [16,17], and in terms of second order coherence [18]. The connection between the noise properties of SC and the formation of rogue waves has also been studied [19].…”

Section: Introductionmentioning

confidence: 99%

Experimental measurement of supercontinuum coherence in highly nonlinear soft-glass photonic crystal fibers

et al. 2017

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We present experimental measurements illustrating the power-dependent coherence evolution for supercontinuum generated in highly nonlinear SF6 photonic crystal fibers. The measurements were performed for fiber lengths close to and much longer than the soliton fission length. Simulations of the spectral evolution were also carried out to accompany the experimental observation. Many parameters were estimated by matching the simulated and the measured evolution. Both the measured and the simulated coherence evolution confirm the association between coherence degradation and soliton fission.

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Experimental Measurement of Supercontinuum Second Order Coherence

Cited by 3 publications

References 0 publications

Ultrafast measurements of optical spectral coherence by single-shot time-stretch interferometry

Ultrafast measurements of optical spectral coherence by single-shot time-stretch interferometry

Interferometric autocorrelation measurements of supercontinuum based on two-photon absorption

Experimental measurement of supercontinuum coherence in highly nonlinear soft-glass photonic crystal fibers

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