scholarly journals Каскадная генерация второй гармоники с половинным порядком периодической ориентации

2020 ◽  
Vol 128 (11) ◽  
pp. 1717
Author(s):  
В.Ю. Мыльников ◽  
Н.С. Аверкиев ◽  
Г.С. Соколовский
Keyword(s):  
Light Propagation ◽  
Second Harmonic ◽  
Nonlinear Crystal ◽  
Phase Matching ◽  
Crystal Length ◽  
Periodically Poled ◽  
Second Stage ◽  
Fourth Harmonic ◽  
Harmonic Average ◽  
Heisenberg Equations

We theoretically demonstrate cascaded fourth and second harmonic generation in a periodically-poled nonlinear crystal with a half-order of phase-matching period. We consider a cascaded process in which four photons of the fundamental harmonic firstly convert into an intermediate photon of the fourth harmonic, which parametrically decays into two photons of the second harmonic at the second stage. Phase-matching for this cascaded nonlinear conversion is provided by using an asymmetric periodical poling. We use the quantum spatial Heisenberg equations to describe light propagation and conversion inside the nonlinear crystal. With this approach, we calculate second and fourth harmonic average number of photons as a function of the nonlinear crystal length.

scholarly journals A Systematic Study of PPLN Length Dependence in Intracavity SHG

2021 ◽  
Author(s):  
Tyler Kashak ◽  
Liam Flannigan ◽  
Chang-qing Xu
Keyword(s):  
Systematic Study ◽  
Continuous Wave ◽  
Second Harmonic ◽  
Tuning Curve ◽  
Nonlinear Crystal ◽  
Crystal Length ◽  
Periodically Poled ◽  
Single Pass ◽  
Diode Pumped ◽  
Temperature Tuning

Abstract In this paper, a systematic study of the relationship between nonlinear crystal length and intracavity second-harmonic generation (SHG) using MgO-doped periodically-poled lithium niobate (MgO:PPLN) is presented. The experimental results demonstrate a relationship between the maximum SHG power generated and the full-width at half maximum (FWHM) of the crystal’s temperature tuning curve to the length of the nonlinear optical crystal. It was shown that maximum SHG power increases rapidly with the increase of MgO:PPLN length, reaching a saturation length (~2 mm), which is much shorter than that predicted by the single-pass SHG theory. This saturation length of the MgO:PPLN crystal is almost independent on 808 nm pump power for typical powers used in continuous wave intracavity SHG lasers. In addition to this saturation effect, a broadening effect was also observed, the FWHM of the temperature tuning curve was shown to have a larger FWHM than that predicted by the single-pass SHG theory for MgO:PPLN shorter than the saturation length. This work has the benefit of allowing engineers to optimize nonlinear crystal length when developing intracavity SHG based diode-pumped solid state (DPSS) lasers.

scholarly journals A systematic study of PPLN length dependence in intracavity SHG

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tyler Kashak ◽  
Liam Flannigan ◽  
Chang-qing Xu
Keyword(s):  
Systematic Study ◽  
Continuous Wave ◽  
Second Harmonic ◽  
Tuning Curve ◽  
Nonlinear Crystal ◽  
Crystal Length ◽  
Periodically Poled ◽  
Single Pass ◽  
Diode Pumped ◽  
Temperature Tuning

AbstractIn this paper, a systematic study of the relationship between nonlinear crystal length and intracavity second-harmonic generation (SHG) using MgO-doped periodically-poled lithium niobate (MgO:PPLN) is presented. The experimental results demonstrate a relationship between the maximum SHG power generated and the full-width at half maximum (FWHM) of the crystal’s temperature tuning curve to the length of the nonlinear optical crystal. It was shown that maximum SHG power increases rapidly with the increase of MgO:PPLN length, reaching a saturation length (~ 2 mm), which is much shorter than that predicted by the single-pass SHG theory. This saturation length of the MgO:PPLN crystal is almost independent on 808 nm pump power for typical powers used in continuous wave intracavity SHG lasers. In addition to this saturation effect, a broadening effect was also observed, the FWHM of the temperature tuning curve was shown to have a larger FWHM than that predicted by the single-pass SHG theory for MgO:PPLN shorter than the saturation length. This work has the benefit of allowing engineers to optimize nonlinear crystal length when developing intracavity SHG based diode-pumped solid state (DPSS) lasers.

Blue 473-nm solid state diode pumped Nd:YAG/BiBO microchip laser

2010 ◽  
Vol 18 (1) ◽  
Author(s):  
A. Antończak ◽  
J. Sotor ◽  
M. Matysiak ◽  
K. Abramski
Keyword(s):  
Blue Light ◽  
Second Harmonic ◽  
Nonlinear Crystal ◽  
Phase Matching ◽  
Type I ◽  
Pumping Power ◽  
Diode Pumped ◽  
Light Generation ◽  
Power Diode ◽  
Matching Type

AbstractIn this paper we present a design of a compact, low power diode-pumped CW Nd:YAG laser operating at 946 nm with intracavity blue light generation at 473 nm for battery operated applications. The nonlinear crystal used in the experiment is a BiBO crystal cut for phase-matching type I. Using 0.8 W of pumping power, 20-mW stabile output power of blue light was achieved. The second harmonic generation conversion efficiency was 2.5%.

Electro-optic modification of second-harmonic phase-matching spectra in segmented periodically poled LiNbO_3

2002 ◽  
Vol 19 (2) ◽  
pp. 280 ◽  
Author(s):  
Heiko Ridderbusch ◽  
Marvin E. Klein ◽  
Petra Gross ◽  
Dong-Hoon Lee ◽  
Jan-Peter Meyn ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Phase Matching ◽  
Periodically Poled ◽  
Harmonic Phase ◽  
Electro Optic

scholarly journals Generation of Second-Harmonic Bessel Beams by Transverse Phase-Matching in Annular Periodically Poled Structures

2008 ◽  
Vol 47 (8) ◽  
pp. 6777-6783 ◽  
Author(s):  
Solomon M. Saltiel ◽  
Dragomir N. Neshev ◽  
Robert Fischer ◽  
Wieslaw Krolikowski ◽  
Ady Arie ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Phase Matching ◽  
Bessel Beams ◽  
Periodically Poled

Generation of 116-mW output power at 461 nm in a periodically poled lithium niobate waveguide

2022 ◽  
Author(s):  
Yusuke Hisai ◽  
Yoshiki Nishida ◽  
Hiroshi Miyazawa ◽  
Takumi Kobayashi ◽  
Feng-Lei HONG ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Optical Lattice ◽  
Second Harmonic ◽  
Beam Quality ◽  
Cold Atom ◽  
Phase Matching ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate ◽  
Good Beam Quality ◽  
Output Facet

Abstract We demonstrate a second harmonic generation (SHG) of 116 mW at 461 nm in a periodically poled lithium niobate waveguide when the power of the 922-nm fundamental light is coupled into the waveguide was 350 mW. The waveguide is 12.5 μm wide, 12.0 μm thick, 22 mm long, and has a 1-mm-long slab window at the output facet of the waveguide. The temperature acceptance bandwidth of the phase-matching curve of the SHG is approximately 0.5 °C. The SHG system demonstrates good beam quality and is reliable for cold atom experiments, including research on optical lattice clocks.

scholarly journals Broadening of the second-harmonic phase-matching bandwidth in a temperature-gradient-controlled periodically poled Ti:LiNbO3 channel waveguide

2003 ◽  
Vol 11 (22) ◽  
pp. 2813 ◽  
Author(s):  
Yeung Lak Lee ◽  
Young-Chul Noh ◽  
Changsoo Jung ◽  
Tae Yu ◽  
Do-Kyeong Ko ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Second Harmonic ◽  
Channel Waveguide ◽  
Phase Matching ◽  
Periodically Poled ◽  
Harmonic Phase

Phase-matching with a twist: Second-harmonic generation in birefringent periodically poled fibers

2010 ◽  
Vol 27 (11) ◽  
pp. 2410 ◽  
Author(s):  
E. Y. Zhu ◽  
L. Qian ◽  
L. G. Helt ◽  
M. Liscidini ◽  
J. E. Sipe ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Phase Matching ◽  
Periodically Poled
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