Wavelength insensitive phase-matched second-harmonic generation in partially deuterated KDP

Webb, M.S.W.; Eimerl, D.; Velsko, Stephan P.

doi:10.1364/josab.9.001118

Cited by 62 publications

(34 citation statements)

References 23 publications

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“…Such a turning point (at λ F ) in the dependence of the fundamental wavelength on the phasematching angle in SHG means nothing but broadband phase matching, which is equivalent to vanishing GVM between the fundamental and the second harmonic. Indeed, it can be easily shown that this GVM vanishes at the point where (∂θ/∂λ) λF = 0 for the SHG phase-matching curve [114], see Fig. 10a.…”

Section: Spectral Acceptance and Parametric Gain Bandwidthmentioning

confidence: 95%

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Femtosecond nonlinear frequency conversion based on BiB₃O₆

Petrov¹,

Ghotbi

Kokabee

et al. 2010

Laser & Photonics Reviews

112

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We review the physical properties, linear and nonlinear optical characteristics, and phase-matching configurations of BiB3O6 (BIBO), the first low-symmetry (monoclinic) inorganic nonlinear crystal that has found broad applications for frequency conversion of laser sources from the UV, across the visible, to the near-IR based on three-wave interactions. We describe in detail the most relevant optical properties that make this material an attractive candidate for nonlinear frequency conversion of laser light in general, and ultrafast femtosecond laser sources in particular. With special focus on ultrafast frequency conversion, characteristics such as group-velocity mismatch and spectral acceptance, parametric gain bandwidth, group-velocity dispersion, as well as angular acceptance and spatial walk-off are evaluated and optimum configurations for the attainment of maximum conversion efficiency, minimum pulse duration, and highest spatial beam quality are identified and compared with the most widely established alternative borate crystal, β-BaB2O4. Experimental results are presented on both parametric up-and down-conversion of femtosecond pulses, from the high-energy, low-repetition-rate (1 kHz) to the low-energy, high-repetitionrate (56-76 MHz) regime, demonstrating the unique versatility of BIBO for efficient frequency conversion of femtosecond pulses with broad tunability from 250 nm in the UV, throughout the visible, up to ∼ 3000 nm in the IR.Photograph of a femtosecond synchronously pumped optical parametric oscillator (SPOPO) based on BiB3O6 emitting in the yellow region of the spectrum. Pumped near 400 nm in the blue by the second harmonic of a Kerr-lens mode-locked Ti:sapphire laser, the SPOPO can generate femtosecond pulses across the full visible range of 480-710 nm, from the blue-green, through to yellow, orange and red.

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Section: Spectral Acceptance and Parametric Gain Bandwidthmentioning

confidence: 95%

“…The existence of a turning point in the SHG phase-matching curve, see Fig. 7, is attributed to anomalous dispersion [114]. It, in fact, determines the existence of the retracing phenomenon in the OPA/OPG curves, which can be characterized by three or more turning points [112].…”

Section: Spectral Acceptance and Parametric Gain Bandwidthmentioning

confidence: 98%

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Petrov¹,

Ghotbi

Kokabee

et al. 2010

Laser & Photonics Reviews

112

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“…Phase matching estimation for solid solution crystals GaSe 1-x S x can be carried out by using relationship proposed in 48 that is, in particular, adapted for solid solution GaSe:GaS in 49 as follows: In Fig.6 with the fact of wide using of Vodopyanov's dispersion equations and well matching of experimental and estimated PM angles. It can be explained by differences in the magnitudes of PM angles for considered down-conversion processes.…”

Section: Model Studymentioning

confidence: 99%

Model studies of THz-range generation by down-conversion in GaSe and GaSeS crystals

et al. 2015

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Model study of not phase matched and phase matched optical rectification or down-conversion of Ti:Sapphire laser pulses at 950 nm into THz and far-IRrange in pure and S-doped GaSe single crystals is carried out. First, the ordinary and extraordinary wave dispersions of the GaSe refractive indices were measured by terahertz time-domain spectroscopy (THz-TDS). Measured data were approximated in the form of Sellmeier dispersion equations for 0.62 -2000 µm range with using available shorter wave data.

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“…The expression for determining the dispersion properties of crystals of solid solutions with respect to the known dispersion properties of the original crystals [20], written as applied to the case under consideration in the form…”

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confidence: 99%

Dispersion properties of GaSe1-x S x in the terahertz range

Zhang

Guo

et al. 2011

J Appl Spectrosc

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We grew nonlinear crystals of the solid solutions GaSe 1-x S x (x ≤ 0.4) by the vertical Bridgman method. The increase in hardness from 8 kg/mm 2 for x = 0 to ~20 kg/mm 2 for x = 0.4 as a result of the presence of sulfur in the GaSe crystals allowed us to use a special technology to make working samples with position of the optic axis in the plane of the entrance surfaces, and for the first time to make direct measurements of the dispersion properties n e (λ) for the extraordinary wave and n o (λ) for the ordinary wave in the terahertz range of the spectrum by pulsed terahertz spectroscopy. We show that it is possible to realize an unconventional ee-e type of interaction in generation of terahertz radiation.Introduction. The unique set of physical properties in nonlinear GaSe crystals, responsible for the efficiency of parametric frequency conversion processes for converting radiation in the near IR and mid-IR ranges to the terahertz range of the spectrum [1, 2], has attracted steady attention from many researchers and developers. Unfortunately, the extremely poor mechanical properties (almost zero hardness on the Mohs scale and easy cleavage) limit use of these layered crystals of symmetry point group 6 _ 2m to intralaboratory applications. Recently, with the aim of expanding nonlinear optics applications, the mechanical properties of GaSe crystals have been significantly improved as a result of doping with Group III and Group IV elements of Mendeleev's Periodic Table (Al [3], S [4], In [5-7], Te [8,9], Er [10]) and growing the corresponding crystals of the solid solutions, and also by growing crystals from GaSe:AgGaSe 2 [6] and GaSe:AgGaS 2 [11] melts. In contrast to GaSe crystals, AgGaSe 2 and AgGaS 2 crystals have symmetry point group 4 _ 2m. It has been established that besides the mechanical properties, other key physical properties of GaSe crystals can be controllably modified by selection of the sulfur content. Introducing large concentrations of sulfur, indium, and tellurium (leading to a change in the lattice parameters) have the best possibilities in this regard; in other words, growing nonlinear crystals of solid solutions according to the chemical formulas GaSe:GaS → GaSe 1-x S x [4], [12][13][14][15][16][17][18][19], GaSe:InSe → Ga 1-x In x Se [5,7], and GaSe:GaTe → GaSe 1-x Te x [8,9]. Introducing small sulfur ions eliminates cleavage defects in the GaSe crystals and reduces linear optical losses in the region of maximum transparency (optimal doping level, 2-3 wt.%), and also increases the thermal conductivity severalfold orthogonal to the growth layers, as a result of substitution of selenium ions, filling vacancies, and intercalation in the interlayer space. As a result of these changes, the radiation resistance relative to nanosecond pump pulses increases by 20%-30%. The increase in the mixing ratio to x ≤ 0.4 shifts the short-wavelength edge of the transmission spec-

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Wavelength insensitive phase-matched second-harmonic generation in partially deuterated KDP

Cited by 62 publications

References 23 publications

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Model studies of THz-range generation by down-conversion in GaSe and GaSeS crystals

Dispersion properties of GaSe1-x S x in the terahertz range

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Wavelength insensitive phase-matched second-harmonic generation in partially deuterated KDP

Cited by 62 publications

References 23 publications

Femtosecond nonlinear frequency conversion based on BiB3O6

Femtosecond nonlinear frequency conversion based on BiB3O6

Model studies of THz-range generation by down-conversion in GaSe and GaSeS crystals

Dispersion properties of GaSe1-x S x in the terahertz range

Contact Info

Product

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About

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Femtosecond nonlinear frequency conversion based on BiB₃O₆