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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 paper, numerical simulations are used to study how fiber supercontinuum generation seeded by picosecond pulses can be actively controlled through the use of input pulse modulation, and the results are discussed in terms of the nonlinear propagation dynamics and pump depletion.
Abstract: Numerical simulations are used to study how fiber supercontinuum generation seeded by picosecond pulses can be actively controlled through the use of input pulse modulation. By carrying out multiple simulations in the presence of noise, we show how tailored supercontinuum spectra with increased bandwidth and improved stability can be generated using an input envelope modulation of appropriate frequency and depth. The results are discussed in terms of the nonlinear propagation dynamics and pump depletion.
101 citations
TL;DR: Supercontinuum generation in a solid-state medium was investigated experimentally and a continuum covering 460 to 950 nm was obtained when 0.8 mJ/30 fs Ti:sapphire laser pulses were applied to seven thin fused silica plates at a 1 kHz repetition rate.
Abstract: Supercontinuum generation in a solid-state medium was investigated experimentally. A continuum covering 460 to 950 nm was obtained when 0.8 mJ/30 fs Ti:sapphire laser pulses were applied to seven thin fused silica plates at a 1 kHz repetition rate. The primary processes responsible for spectral broadening were self-phase modulation (SPM) and self-steepening, while SPM and self-focusing were balanced to optimize the spectral broadening and suppress the multiphoton process. The output was compressed to a 5.4 fs and a 0.68 mJ pulse, corresponding to two optical cycles and 0.13 TW of peak power.
101 citations
TL;DR: In this article, the authors measured the threshold energy for supercontinuum generation and bulk damage in fused silica using numerical apertures (NAs) ranging from 0.01 to 0.65.
Abstract: Competing nonlinear optical effects are involved in the interaction of femtosecond laser pulses with transparent dielectrics: supercontinuum generation and multiphoton-induced bulk damage. We measured the threshold energy for supercontinuum generation and bulk damage in fused silica using numerical apertures (NAs) ranging from 0.01 to 0.65. The threshold for supercontinuum generation exhibits a minimum near 0.05NA and increases quickly above 0.1 NA. For NAs greater than 0.25, we observe no supercontinuum generation. The extent of the blue broadening of the supercontinuum spectrum decreases significantly as the NA is increased from 0.01 to 0.08, showing that weak focusing is important for generating the broadest supercontinuum spectrum. Using a light-scattering technique to detect the onset of bulk damage, we confirmed bulk damage at all NAs studied. At a high NA, the damage threshold is well below the critical power for self-focusing.
100 citations
TL;DR: Infrared supercontinua spanning the range 3-14 microm were observed when an intense pulse generated from a CO(2) laser was passed into GaAs, AgBr, ZnSe, and CdS crystals, qualitatively compared with theoretical predictions.
Abstract: Infrared supercontinua spanning the range 3-14 microm were observed when an intense pulse generated from a CO(2) laser was passed into GaAs, AgBr, ZnSe, and CdS crystals. These supercontinua have been qualitatively compared with theoretical predictions.
100 citations
TL;DR: In this paper, a supercontinuum (SC) pulse generation in a single-mode optical fiber with a convex dispersion profile is described. And the authors present general criteria for SC generation by introducing normalized parameters that allow the shape of the SC spectrum to be invariant for several SC-generating fibers and optical pump pulses.
Abstract: We present an analysis and describe the design of supercontinuum (SC) pulse generation in a single-mode optical fiber. SC generation with a dispersion-decreasing fiber with a convex dispersion profile is contrasted with other approaches to obtaining conditions for generating a flat, broadened spectrum. We present general criteria for SC generation by introducing normalized parameters that allow the shape of the SC spectrum to be invariant for several SC-generating fibers and optical pump pulses. Based on these results, we designed a SC fiber and experimentally generated SC pulses that were in good agreement with theory.
100 citations