Efficient Dispersive Waves Generation From Argon-Filled Anti-Resonant Nodeless Fiber
Fanchao MengShoufei GaoYingying WangPu WangJunku LiuSijia WangBowen LiuYanfeng LiChingyue WangMinglie Hu
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Abstract:
We report dispersive waves generation in an argon-filled anti-resonant nodeless fiber pumped by ultrashort pulses centered at different wavelengths. The conversion efficiency can be as high as 16% with a bandwidth below 10 nm.Keywords:
Frequency Conversion
Hybridized OPA and idler SHG suppresses back-conversion in OPA, dramatically improving efficiency. Spatiotemporal analysis of CSP and LNB-based devices demonstrates up to 55% energy conversion to signal and efficient fractional harmonic pump upconversion.
Photon Upconversion
Frequency Conversion
Harmonic
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Energy transformation
Harmonic Analysis
Optical Pumping
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The continuously tunable sum-frequency generation of 367.3-379.4 nm of the Rh·6G dye laser and the Q-YAG laser was obtained in β-BaB2O4 crystal. The sum-frequency output energy is about 2 mJ, and the conversion efficiency is about 12%. The influence of the non-collinear propagation on the output energy and conversion efficiency of turn-frequency generation are also discussed.
Crystal (programming language)
Frequency Conversion
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Novel cascaded /spl chi//sup (2)/ wavelength conversions based on sum frequency generation and difference frequency generation (SFG+DFG) is proposed and demonstrated. Conversion efficiency is enhanced by 6 dB as compared with the conventional cascaded SHG+DFG wavelength conversion configuration.
Frequency Conversion
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Thegeneration ofnarrow-band THzradiation isdemonstrated inorientation patterned GaAs structures viafrequency down-conversion of shortoptical pulses. Frequency ofTHzradiation istunable inthe range0.8-3THz.Optical toTHz power conversion efficiency reaches0.1%, corresponding tointernal photon conversion efficiency of10%. THzgeneration viaoptical down-conversion in non-linear crystals hasbeenfirst demonstrated in theearly 1970s(1)andithasbeenthoroughly investigated inavariety ofmaterials. While this method ofTHzgeneration iswidely usedby researchers, itislimited bylowconversion efficiency ofoptical powertoTHzradiation, which typically is0.001%. Theefficiency oftheoptical down-conversion process islimited bythree factors:
Frequency Conversion
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The phenomenon of phase-matching curve transformation under strong energy exchange conditions and its influence on frequency conversion of ultrashort light pulses in nonlinear crystals are discussed. The routes to increase energy conversion efficiency in three-wave interactions are suggested.
Frequency Conversion
Energy exchange
Energy transformation
Ultrafast optics
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Back conversion is an intrinsic phenomenon in nonlinear frequency down-conversion processes. However, the physical reason for its occurrence is not well understood. Here, we theoretically reveal that back conversion is the result of a π-phase jump associated with the depletion of one interacting wave. By suppressing the idler phase jump through a deliberate crystal absorption, the back conversion can be inhabited, thus enhancing the conversion efficiency from the pump to the signal. The results presented in this Letter will further the understanding of nonlinear parametric processes and pave the way toward the design of highly efficient down-conversion systems.
Frequency Conversion
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Spontaneous parametric down-conversion
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A frequency conversion technique applied to iodine laser beams is described in detail for the ISKRA-4 and PERUN as representatives of wide and narrow aperture systems. The conversion efficiency was measured and predicted theoretically for both the 2nd and 3rd harmonics. The performance of conventionally grown conversion DKDP crystals is compared with that grown by the accelerated and the directional method. Examples are given of physical target experiments using the converted beams.
Frequency Conversion
Aperture (computer memory)
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A theoretical model of wavelength conversion based on Sum-Frequency Generation Quasiphase-Matched in nonlinear medium with periodically structure is established. For example, AlGaAs, using this model, the simulation of the numerical value relationship of device length and conversion efficiency for different transmission loss is given, as well as the relationship of pump power and conversion wavelength power. Results show that pump power, transmission loss and device length are main factors in the process of conversion.
Frequency Conversion
Transmission loss
Nonlinear medium
Power loss
Power transmission
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A theoretical analysis is made of the interaction between fields whose frequencies satisfy the relationship ωp–ωs=ωg±ωa≈ω21 , where ωp, ωs, ωg and ωa are the frequencies of the pump, Stokes, generated, and auxiliary fields; ω21 tne frequency of a transition between two levels in the investigated susbstance. The conditions are established for the maximum efficiency of the conversion of the fields ωp and ωa into the field ωg. It is shown that the optimal conversion conditions are obtained for a certain ratio of the pump and auxiliary field powers when the phases of the interacting waves are locked. Numerical estimates are obtained of the conversion efficiency and interaction length when the active substance is potassium vapor or compressed hydrogen.
Frequency Conversion
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