FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1974773386> ?p ?o ?g. }

• W1974773386 abstract "Summary form only given. Efficiency of second-harmonic generation (SHG) of broadband light pulses is limited by chromatic dispersion of a nonlinear crystal. The group velocity mismatch between first and second harmonic pulses results diminishing overlap between pulses as they propagate in a nonlinear crystal. Particularly, when fundamental pulses are chirped (phase-modulated), the group velocity mismatch causes loss of phase-matching even before complete walk-off of pulse envelopes occurs. This limits the optimal crystal length and, as a result, overall conversion efficiency. In order to maintain the high conversion efficiency in a shorter crystal, pulse irradiance has to be increased. However, the pulse irradiance is limited by the crystal damage threshold. Thus, achieving the high conversion efficiency of broadband pulses is not a trivial task, especially when the pulses are not bandwidth-limited. Concept of improving the frequency conversion bandwidth by inducing a constant temperature gradient along a nonlinear crystal was proposed by R.A. Hass. The phase-matching wavelength of the non-critical phase-matched SHG in a nonlinear crystal depends on the crystal temperature. When a constant temperature gradient is imposed along the crystal, the phase-matching conditions for different wavelengths are satisfied at different positions along the crystal. This explains the broad conversion bandwidth achievable by this method. However, in order to fully analyze possible improvements in the conversion efficiency achievable by this method, numerical calculations are required. In this contribution, we present results of numerical and experimental investigation of the non-critical phasematched SHG in LiB3O5 (LBO) crystal with a constant axial temperature gradient. Numerical calculations were accomplished by integrating (in the plane-wave limit) coupled-wave equations using a split-step technique in which pulse propagation is handled by the fast Fourier transform methods, whereas nonlinear interaction is handled by Runge-Kutta integration. According to the numerical results, by using the SHG method with a constant axial temperature gradient for broadband (phase-modulated) picosecond pulses, higher conversion efficiency could be achieved than using conventional SHG method, when the crystal temperature is uniform. For the experiment, a special crystal oven with two independent heaters at opposite ends of the crystal was developed. Second harmonic of the 12 nm bandwidth (1064 nm center wavelength) 11 ps pulses was generated in the 30 mm long LBO crystal with axial temperature gradient. At pulse energy of 2.5 μJ, the conversion efficiency was higher than 65 % and the whole fundamental spectrum was converted to second harmonic. The obtained experimental results were in agreement with results of our numerical calculations. According to our results, this SHG method can be attractive for implementation in practical applications, because of the high-efficiency broadband operation, robust design and simple wavelength tuning. Particularly, when using the LBO nonlinear crystal, a single frequency conversion module can be designed suitable for operation in the whole ytterbium-doped fiber laser gain wavelength range." @default.
• W1974773386 created "2016-06-24" @default.
• W1974773386 creator A5020552622 @default.
• W1974773386 creator A5040313766 @default.
• W1974773386 creator A5067367083 @default.
• W1974773386 creator A5088883654 @default.
• W1974773386 date "2013-05-01" @default.
• W1974773386 modified "2023-10-14" @default.
• W1974773386 title "Efficient second-harmonic generation of broadband radiation in the nonlinear crystal with constant axial temperature gradient" @default.
• W1974773386 cites W2046676753 @default.
• W1974773386 cites W2066530779 @default.
• W1974773386 cites W2137302618 @default.
• W1974773386 doi "https://doi.org/10.1109/cleoe-iqec.2013.6800929" @default.
• W1974773386 hasPublicationYear "2013" @default.
• W1974773386 type Work @default.
• W1974773386 sameAs 1974773386 @default.
• W1974773386 citedByCount "0" @default.
• W1974773386 crossrefType "proceedings-article" @default.
• W1974773386 hasAuthorship W1974773386A5020552622 @default.
• W1974773386 hasAuthorship W1974773386A5040313766 @default.
• W1974773386 hasAuthorship W1974773386A5067367083 @default.
• W1974773386 hasAuthorship W1974773386A5088883654 @default.
• W1974773386 hasConcept C120665830 @default.
• W1974773386 hasConcept C121332964 @default.
• W1974773386 hasConcept C192562407 @default.
• W1974773386 hasConcept C199360897 @default.
• W1974773386 hasConcept C206991015 @default.
• W1974773386 hasConcept C2776257435 @default.
• W1974773386 hasConcept C2781285689 @default.
• W1974773386 hasConcept C30713254 @default.
• W1974773386 hasConcept C41008148 @default.
• W1974773386 hasConcept C49040817 @default.
• W1974773386 hasConcept C520434653 @default.
• W1974773386 hasConcept C6260449 @default.
• W1974773386 hasConcept C76155785 @default.
• W1974773386 hasConcept C78854221 @default.
• W1974773386 hasConceptScore W1974773386C120665830 @default.
• W1974773386 hasConceptScore W1974773386C121332964 @default.
• W1974773386 hasConceptScore W1974773386C192562407 @default.
• W1974773386 hasConceptScore W1974773386C199360897 @default.
• W1974773386 hasConceptScore W1974773386C206991015 @default.
• W1974773386 hasConceptScore W1974773386C2776257435 @default.
• W1974773386 hasConceptScore W1974773386C2781285689 @default.
• W1974773386 hasConceptScore W1974773386C30713254 @default.
• W1974773386 hasConceptScore W1974773386C41008148 @default.
• W1974773386 hasConceptScore W1974773386C49040817 @default.
• W1974773386 hasConceptScore W1974773386C520434653 @default.
• W1974773386 hasConceptScore W1974773386C6260449 @default.
• W1974773386 hasConceptScore W1974773386C76155785 @default.
• W1974773386 hasConceptScore W1974773386C78854221 @default.
• W1974773386 hasLocation W19747733861 @default.
• W1974773386 hasOpenAccess W1974773386 @default.
• W1974773386 hasPrimaryLocation W19747733861 @default.
• W1974773386 hasRelatedWork W1975491326 @default.
• W1974773386 hasRelatedWork W1984482721 @default.
• W1974773386 hasRelatedWork W2003321092 @default.
• W1974773386 hasRelatedWork W2036769878 @default.
• W1974773386 hasRelatedWork W2057174926 @default.
• W1974773386 hasRelatedWork W2097195082 @default.
• W1974773386 hasRelatedWork W2357380975 @default.
• W1974773386 hasRelatedWork W2479654199 @default.
• W1974773386 hasRelatedWork W2795760971 @default.
• W1974773386 hasRelatedWork W2182078154 @default.
• W1974773386 isParatext "false" @default.
• W1974773386 isRetracted "false" @default.
• W1974773386 magId "1974773386" @default.
• W1974773386 workType "article" @default.