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Title: Second harmonic generation of spectrally broadened femtosecond ytterbium laser radiation in a gas-filled capillary

Abstract

A 300-fs radiation pulse of an ytterbium laser with a wavelength of 1030 nm and energy of 150 {mu}J were converted to a 15-fs pulse with a wavelength of 515 nm by broadening the emission spectrum in a capillary filled with xenon and by generating the second harmonic in a KDP crystal. The energy efficiency of the conversion was 30 %.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
22043674
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 41; Journal Issue: 9; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CAPILLARIES; CONVERSION; EMISSION SPECTRA; ENERGY EFFICIENCY; HARMONIC GENERATION; LASER RADIATION; NONLINEAR PROBLEMS; PULSES; WAVELENGTHS; XENON; YTTERBIUM

Citation Formats

Didenko, N V, Konyashchenko, Aleksandr V, Kostryukov, P V, Losev, Leonid L, and Tenyakov, S Yu. Second harmonic generation of spectrally broadened femtosecond ytterbium laser radiation in a gas-filled capillary. United States: N. p., 2011. Web. doi:10.1070/QE2011V041N09ABEH014632.
Didenko, N V, Konyashchenko, Aleksandr V, Kostryukov, P V, Losev, Leonid L, & Tenyakov, S Yu. Second harmonic generation of spectrally broadened femtosecond ytterbium laser radiation in a gas-filled capillary. United States. doi:10.1070/QE2011V041N09ABEH014632.
Didenko, N V, Konyashchenko, Aleksandr V, Kostryukov, P V, Losev, Leonid L, and Tenyakov, S Yu. 2011. "Second harmonic generation of spectrally broadened femtosecond ytterbium laser radiation in a gas-filled capillary". United States. doi:10.1070/QE2011V041N09ABEH014632.
@article{osti_22043674,
title = {Second harmonic generation of spectrally broadened femtosecond ytterbium laser radiation in a gas-filled capillary},
author = {Didenko, N V and Konyashchenko, Aleksandr V and Kostryukov, P V and Losev, Leonid L and Tenyakov, S Yu},
abstractNote = {A 300-fs radiation pulse of an ytterbium laser with a wavelength of 1030 nm and energy of 150 {mu}J were converted to a 15-fs pulse with a wavelength of 515 nm by broadening the emission spectrum in a capillary filled with xenon and by generating the second harmonic in a KDP crystal. The energy efficiency of the conversion was 30 %.},
doi = {10.1070/QE2011V041N09ABEH014632},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 9,
volume = 41,
place = {United States},
year = 2011,
month = 9
}
  • A 290-fs radiation pulse of an ytterbium laser system with a central wavelength of 1028 nm and an energy of 145 {mu}J was compressed to a 27-fs pulse with an energy of 75 {mu}J. The compression was realised on the basis of the effect of pulse spectrum broadening in a xenon-filled glass capillary for a pulse repetition rate of 3kHz. (control of laser radiation parameters)
  • We have carried out experimental and theoretical investigations of a tunable coherent soft X-ray radiation source in the 30 – 52 nm wavelength range based on the generation of high-order harmonics of femtosecond laser radiation propagating in a dielectric xenon-filled capillary. The long path of laser pulse propagation through the capillary permits tuning the generated harmonic wavelengths to almost completely span the range under consideration. (interaction of radiation with matter)
  • Second harmonic generation of radiation from a high-power fibre Yb{sup 3+} laser is studied upon sf-f phase matching near the X axis of the KTP crystal (KTiOPO{sub 4}). The temperature dependence of the phase-matching wavelength as well as its spectral, angular and temperature tuning characteristics of the second harmonic generator are experimentally measured. It is found that the increase in the average output power of the second harmonic in a single crystal is limited, first of all, by the thermal self-focusing of radiation caused by the absorption of radiation from the second harmonic, whose threshold decreases with increasing the crystalmore » temperature. When the two-channel scheme is used, the maximum stable {approx}4-W output power of the second harmonic is obtained in two tandem KTP crystals. (nonlinear optical phenomena)« less
  • The second-harmonic generation (SHG) efficiency for cw Yb-doped fibre laser radiation, which is characterised by many longitudinal modes with random phases, is compared with the SHG efficiency for amplified single-frequency Nd : YAG laser radiation in ppLN and KTP crystals, characterised by the type-I and type-IIphase matching, respectively. It is shown that the conversion efficiency into the second harmonic in the multifrequency regime for both crystals is higher by a factor of about 1.6, a value close to the calculated enhancement (2 for the Gaussian mode statistics). This difference is explained by possible deviation of the statistics of the Yb-dopedmore » fibre laser radiation from Gaussian, which is confirmed by measurements of the laser temporal dynamics. (laser optics 2012)« less
  • Highly efficient ({approx}70%) second harmonic generation of tightly focused femtosecond radiation from a Cr:forsterite laser is obtained in a LiNbO{sub 3} crystal. The pulse energy amounts to 10 nJ, the spatial and spectral quality of second harmonic radiation being preserved. (nonlinear optical phenomena)