Topic
Supercontinuum
About: Supercontinuum is a research topic. Over the lifetime, 7071 publications have been published within this topic receiving 127671 citations.
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TL;DR: The generation of an octave spanning supercontinuum covering 488-978 nm (at -30 dB) is demonstrated for the first time on-chip for biophotonic applications and frequency metrology.
Abstract: The generation of an octave spanning supercontinuum covering 488–978 nm (at −30 dB) is demonstrated for the first time on-chip. This result is achieved by dispersion engineering a 1-cm-long Si3N4 waveguide and pumping it with an 100-fs Ti:Sapphire laser emitting at 795 nm. This work offers a bright broadband source for biophotonic applications and frequency metrology.
122 citations
TL;DR: In this article, femtosecond Raman spectroscopy has been used to investigate ultrafast photoinduced structural changes of materials, where the vibrational modes in the photogenerated transient species are measured by stimulated Raman scattering using a Raman pump pulse with narrow bandwidth and a femtosescond supercontinuum probe pulse.
Abstract: Femtosecond Raman spectroscopy has been developed to investigate ultrafast photoinduced structural changes of materials. Vibrational modes in the photogenerated transient species are measured by stimulated Raman scattering using a Raman pump pulse with narrow bandwidth and a femtosecond supercontinuum probe pulse. The Raman signal can be measured without slowing the temporal response and broadening the spectrum, because the temporal and spectral resolutions of the present method can be improved independently without the restriction of the transform limit. The transient Raman spectra of the trans- cis photoisomerization process in the DCM (4-dicyanomethylene-2-methyl-6-$p$-dimethylaminostyryl-4H-Pyran) dye solution were observed with the resolutions of 250 fs and $25{\mathrm{cm}}^{\ensuremath{-}1}.$
121 citations
TL;DR: Tissue imaging was demonstrated in transmission at selected wavelengths between 5.7 and 7.3 μm by point scanning over a sub-millimeter region of colon tissue, and the results were compared to images obtained from a commercial instrument.
Abstract: We present, to the best of our knowledge, the first demonstration of mid-infrared supercontinuum (SC) tissue imaging at wavelengths beyond 5 μm using a fiber-coupled SC source spanning 2–7.5 μm. The SC was generated in a tapered large-mode-area chalcogenide photonic crystal fiber in order to obtain broad bandwidth, high average power, and single-mode output for diffraction-limited imaging performance. Tissue imaging was demonstrated in transmission at selected wavelengths between 5.7 (1754 cm−1) and 7.3 μm (1370 cm−1) by point scanning over a sub-millimeter region of colon tissue, and the results were compared to images obtained from a commercial instrument.
121 citations
TL;DR: The ultra-broadband supercontinuum generation in high-confinement Si3N4 integrated optical waveguides is reported, comprising a spectral bandwidth wider than 495 THz, which is the widestsupercontinuum spectrum generated on a chip.
Abstract: We report ultra-broadband supercontinuum generation in high-confinement Si3N4 integrated optical waveguides. The spectrum extends through the visible (from 470 nm) to the infrared spectral range (2130 nm) comprising a spectral bandwidth wider than 495 THz, which is the widest supercontinuum spectrum generated on a chip.
120 citations
Patent•
30 Apr 2002TL;DR: In this paper, a method and system for stable, multi-wavelength continuous wave (CW) generation using fiber-based supercontinuum and spectrum slicing of its longitudinal modes is described.
Abstract: Method and system are disclosed for stable, multi-wavelength continuous wave (CW) generation using fiber-based supercontinuum and spectrum-slicing of its longitudinal modes The continuum generated is coherent and stable, making it an attractive alternative as a spectrally-sliced source for continuous, multiple wavelength channels A 140 nm wide supercontinuum with a 10 GHz repetition rate is generated in <30 meters of fiber To obtain CW channels with 40 GHz spacing, time-domain multiplexing and longitudinal mode slicing are utilized To obtain stable, continuous wave operation, short-fiber supercontinuum generation and a pulse interleaving method are utilized The invention may be utilized as a broadband wavelength-division multiplexed source
120 citations