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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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TL;DR: In this article, the first time to the best knowledge, all-fiber supercontinuum source based on standard telecommunication multimode fiber was realized and the observed spectrum covers the spectral range from 1550 to 2400 nm with the power variation less than two decades.
Abstract: For the first time to our best knowledge we have realized all-fiber supercontinuum source based on standard telecommunication multimode fiber. To pump the source Q-switched Er-doped fiber laser was used. The observed spectrum covers the spectral range from 1550 to 2400 nm with the power variation less than two decades. Average power of 0.85 W and pulse energy of 0.19 mJ was measured.
47 citations
TL;DR: In this article, the role of dispersion in spectral broadening and supercontinuum generation was discussed, and it was shown that decreasing the size of the fiber core allowed the efficiency of supercontinuity generation to be improved without increasing the laser intensity.
Abstract: Supercontinuum emission is generated by the propagation of frequency-tunable femtosecond pulses of 1.1–1.5-µm radiation of an optical parametric amplifier through a photonic-crystal fiber. Nearly an octave’s spectral broadening was observed when laser pulses with a duration of 80–100 fs and an energy of several nanojoules per pulse were coupled into a photonic-crystal fiber with a core radius of 1.5–3 µm. The spectral broadening of femtosecond pulses at 1.1–1.5 µm is shown to be much more efficient than the spectral broadening of femtosecond pulses of 800-nm Ti:sapphire laser radiation. The role of dispersion in spectral broadening and supercontinuum generation is discussed. In experiments on supercontinuum generation with an optical parametric amplifier, the influence of dispersion effects was reduced by decreasing the size of the fiber core, which allowed the efficiency of supercontinuum generation to be improved without increasing the laser intensity.
47 citations
TL;DR: In this paper, a tellurite optical fiber with a suspended core design, formed on a 220-nm wide filament of glass, was used to produce mid-infrared supercontinuum (SC) spectra.
Abstract: We report the fabrication of a tellurite optical fiber with a suspended core design, formed on a 220-nm-wide filament of glass. The fiber was pumped at two different wavelengths (1500 and 2400 nm) using femtosecond pulses generated from an optical parametric oscillator (OPO) in order to produce mid-infrared supercontinuum (SC). We observed that SC spectra extending to 3 µm were readily generated. To further optimize the design, detailed numerical study was performed, which revealed how the fiber structural characteristics dramatically influence the spectral broadening because of the changes in the dispersion profile and in turn, the interplay of nonlinear effects that give rise to SC generation. We found that an accurate control of the core shape can be employed to contain the generated SC spectra within well-defined spectral regions or to provide a broad extension of the continuum to beyond 4 µm.
47 citations
TL;DR: In this article, high nonlinear dispersion-flattened fibres with dispersion slope of 0.0002 µm2/km and Aeff of 16.5 µm 2 have successfully been fabricated.
Abstract: Highly nonlinear dispersion-flattened fibres with dispersion slope of 0.0002 ps/nm2/km and Aeff of 16.5 µm2 have successfully been fabricated. Quasi-tunable wavelength conversion and wideband supercontinuum generation with low input pulse power are demonstrated.
47 citations
TL;DR: In this article, the authors presented an all-fiber system for amplification of high peak power femtosecond pulses in the Er-doped fiber (EDF) laser and amplified using the EDF amplifier system.
Abstract: We present the all-fiber system for amplification of high peak power femtosecond pulses. The 260-fs pulses are generated in the passively mode-locked Er-doped fiber (EDF) laser and amplified using the EDF amplifier system. The average and peak powers of the generated pulses are 215 mW and 43.2 kW, respectively, and the pulsewidth is 42.3 fs. Then the amplified pulses are coupled into polarization-maintaining highly nonlinear dispersion-shifted fiber and octave-spanning supercontinuum is generated. The spectral range is widely expanded from 980 to 2570 nm. To the best of our knowledge, this bandwidth is the maximum one in this wavelength region.
47 citations