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4. Conclusion To obtain high-power tunable short-wavelength mid-infrared ultrashort pulses, this paper utilizes an erbium-doped fiber laser (EDF-LAD) and employs nonlinear amplification and compression methods. Part of the energy is broadened to 1.03 μm via a highly nonlinear fiber, serving as seed…
2025/12/12 10:49
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.3 Differential frequency generation of 2-5 μm high-power tunable mid-infrared ultrashort pulses To obtain a 2-5 μm high-power tunable mid-infrared ultrashort pulse, a 1.55 μm high-energy ultrashort pulse is used…
2025/11/07 14:14
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.2 Difference frequency generation for producing high-power mid-infrared ultrashort pulses at 3μm The time delay line was adjusted to synchronize the pump pulse and signal pulse in time, and the variation of mid-…
2025/10/15 15:43
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.2 Difference frequency generation for producing high-power mid-infrared ultrashort pulses at 3μm We built a DFG (Difference Frequency Generation) system based on a high-power dual-wavelength ultrafast fiber laser…
2025/10/02 11:51
3 Difference frequency generation of high-power mid-infrared ultrafast light sources 3.1 High-power tunable dual-wavelength ultrafast fiber laser The other pulse train serves as the seed for the erbium-doped CPA system. After fiber broadening, two-stage single-mode fiber amplification, one-stage…
2025/09/25 13:29
3 Difference frequency generation of high-power mid-infrared ultrafast light sources3.1 High-power tunable dual-wavelength ultrafast fiber laser Fig.4. High power tunable dual-wavelength (1.55μm/1μm) ultrafine fiber laser experimental device diagram Based on the difference frequency generation…
2025/09/07 16:09
2 Mid-infrared theory and simulation based on PPLN crystal (www.wisoptic.com) difference frequency generation The above analysis demonstrates that pump and signal beam energies significantly influence idler energy generation during DFG. The magnitude and relationship between these two energies…
2025/08/12 09:29
2 Mid-infrared theory and simulation based on PPLN crystal difference frequency generationThe process of ultrashort pulses generating mid-infrared in the PPLN crystal (www.wisoptic.com) is described by the three-wave coupling equation:Ai (z,τ) represents the complex amplitude of the i-th pulse, i…
2025/07/29 18:10
1 IntroductionDFG technology uses a near-infrared light source as a pump pulse, and realizes wavelength conversion through nonlinear effects to generate signal pulses. In the nonlinear crystal, the pump pulse and the signal pulse convert energy to the mid-infrared band through the three-wave mixing…
2025/07/20 18:35
1 IntroductionMid-infrared ultrashort pulse lasers with a wavelength of 2-5 μm have irreplaceable application value in basic research and industrial applications due to their unique band position. In the field of molecular detection, 2-5 μm lasers can resonate with molecules such as CO and N2O,…
2025/05/30 14:14
2 Results and DiscussionThe absorption cross section is an important parameter for optical pumping of laser crystals. The calculation formula is: σabs = α(λ)/N, where N is the concentration of Nd3+ in the crystal (the number of ions per unit volume), which is 1.78×1020 cm-3, and α(λ) is the…
2025/05/22 17:29
2 Results and DiscussionIn order to obtain more crystal structure information, the Rietveld method was used to refine the structure of Nd:YLF (www.wisoptic.com) crystal powder sample. The structural data of YLF crystal was used as the initial data for refinement. Nd3+ and Y3+ are in the same…
2025/04/28 11:08