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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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Journal ArticleDOI
TL;DR: In this article, the shape and spectral distribution associated with the propagation of an ultrashort intense pulse in a cubic (X^(3) ) nonlinear medium are obtained by solving the electromagnetic field wave equation using the method of multiple scales.
Abstract: The pulse shape and the generated supercontinuum spectral distribution associated with the propagation of an ultrashort intense pulse in a cubic ( X^(3) ) nonlinear medium are obtained by solving the electromagnetic field wave equation using the method of multiple scales. New forms for the set of quasi-linear partial differential equations describing the system, pulse distortion, and the spectral extent of the supercontinuum are the focus of this paper.

67 citations

Journal ArticleDOI
TL;DR: A nearly two-octave wide coherent mid-infrared supercontinuum is demonstrated in a dispersion-engineered step-index indium fluoride fiber pumped near 2 µm and shows a high degree of coherence across the generated bandwidth allowing it to be used for frequency comb applications.
Abstract: A nearly two-octave wide coherent mid-infrared supercontinuum is demonstrated in a dispersion-engineered step-index indium fluoride fiber pumped near 2 µm. The pump source is an all-fiber femtosecond laser with 100 fs pulse width, 570 mW average power and 50 MHz repetition rate. The supercontinuum spectrum spans from 1.25 µm to 4.6 µm. Numerical modelling of the supercontinuum spectra show good agreement with the measurements. The coherence of the supercontinuum is calculated using a numerical model and shows a high degree of coherence across the generated bandwidth allowing it to be used for frequency comb applications.

67 citations

Journal ArticleDOI
TL;DR: It is shown that it is possible to control the spectral shape of the SC by tuning the pump wavelength of the input pulse and the consequence for CARS microscopy is discussed.
Abstract: We demonstrate coherent anti-Stokes Raman scattering (CARS) microscopy of lipid-rich structures using a single unamplified femtosecond Ti:sapphire laser and a photonic crystal fiber (PCF) with two closely lying zero dispersion wavelengths (ZDW) for the Stokes source. The primary enabling factor for the fast data acquisition (84 μs per pixel) in the proof-of-principle CARS images, is the low noise supercontinuum (SC) generated in this type of PCF, in contrast to SC generated in a PCF with one ZDW. The dependence of the Stokes pulse on average input power, pump wavelength, pulse duration and polarization is experimentally characterized. We show that it is possible to control the spectral shape of the SC by tuning the pump wavelength of the input pulse and the consequence for CARS microscopy is discussed.

67 citations

Journal ArticleDOI
TL;DR: In this article, the authors numerically study supercontinuum generation in photonic crystal fibers pumped with low-power 30-ps pulses close to the zero dispersion wavelength, and show how the efficiency can be significantly improved by designing the dispersion to allow widely separated spectral lines generated by degenerate four-wave mixing directly from the pump to broaden and merge, resulting in a 800nm wide super-continuum.
Abstract: We numerically study supercontinuum generation in photonic crystal fibers pumped with low-power 30-ps pulses close to the zero dispersion wavelength We show how the efficiency is significantly improved by designing the dispersion to allow widely separated spectral lines generated by degenerate four-wave mixing directly from the pump to broaden and merge, resulting in a 800-nm-wide supercontinuum Full-vectorial plane-wave calculations show that a cobweb photonic-crystal-fiber structure can realize the dispersion profiles under consideration The predicted efficient supercontinuum generation is more robust and survives fiber imperfections modeled as random fluctuations of the dispersion coefficients along the fiber

67 citations

Journal ArticleDOI
TL;DR: Strictly single mode operation of the all-fiber supercontinuum source across the whole spectral range was verified through the quantitative measurement of the beam quality.
Abstract: A 1.05 μm picosecond pulsed fiber master oscillator power amplifier system delivering an average power of over 100 W was used to pump a 5 m long commercially available photonic crystal fiber and a 49.8 W supercontinuum spanning from around 500 nm to above 1700 nm was generated. Strictly single mode operation of the all-fiber supercontinuum source across the whole spectral range was verified through the quantitative measurement of the beam quality.

67 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023184
2022440
2021341
2020411
2019528
2018442