Linear and nonlinear optical properties of MgO:LiTaO3

Dolev, Ido; Ganany-Padowicz, Ayelet; Gayer, O.; Arie, Ady; Mangin, J.; Gadret, Grégory

doi:10.1007/s00340-009-3502-3

Cited by 80 publications

(43 citation statements)

References 22 publications

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“…These values are in excellent agreement with the Čerenkov angles (10:92°) predicted by Eq. (3) when m ¼ 0 and using the refractive indices reported in [17]. These results also indicate that the Čerenkov SH generated in the chessboard-like structure is the most efficient, while that produced by the circular reversed domains is the weakest.…”

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confidence: 62%

Tailoring Čerenkov second-harmonic generation in bulk nonlinear photonic crystal

et al. 2011

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We investigate theoretically the Čerenkov-type second-harmonic generation in two-dimensional bulk nonlinear photonic crystal with longitudinal modulation of the χ ð2Þ nonlinearity. We show that in this scheme the Čerenkov radiation can be achieved simultaneously at multiple directions with comparable intensities. The angles of emission are controllable by the spatial modulation of the nonlinearity. We propose a design of the periodically poled domain pattern, which maximizes the efficiency of the second-harmonic emission.

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confidence: 62%

Tailoring Čerenkov second-harmonic generation in bulk nonlinear photonic crystal

et al. 2011

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“…In Table 1 we list measured and predicted propagation angles of the SH and TH waves, using the refractive index data reported in [19]. Good agreement between theory and experiment is evident.…”

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confidence: 90%

Third-harmonic generation via nonlinear Raman–Nath diffraction in nonlinear photonic crystal

et al. 2011

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We report on the observation of multiple third-harmonic conical waves generated in an annular periodically poled nonlinear photonic crystal. We show that the conical beams are formed as a result of the cascading effect involving two parametric processes that satisfy either the transverse and/or longitudinal phase-patching conditions. This is the first experimental observation of third-harmonic generation based on nonlinear Raman-Nath diffraction. © 2011 Optical Society of America OCIS codes: 190.2620, 190.4410, 220.4000, 050.1940 Third-harmonic generation (THG, also called frequency tripling) is important in many applications as an effective way to achieve coherent light source at shorter wavelengths. To get efficient THG one often employs a two-step cascaded process that involves successive second-harmonic generation (SHG, ω þ ω ¼ 2ω) and sum-. In a nonlinear photonic crystal (NPC) [2][3][4], this process can be realized by using the quasi-phase-matching (QPM) technique [5][6][7][8] that involves a periodic variation to the sign of the second-order nonlinearity χ ð2Þ [9]. The resulting modulation enables one to phase-match the constituent processes via a set of reciprocal lattice vectors (RLV), i.e. k 2 − 2k 1 ¼ G 1 for SHG and k 3 − k 1 − k 2 ¼ G 2 for SFM, with k l ðl ¼ 1; 2; 3Þ being the wave vector of the interacting waves and G 1;2 being RLV [10][11][12]. While these two vectorial relations have been widely used in realization of efficient cascaded THG, it is interesting to see the emission of a third-harmonic (TH) via the socalled Čerenkov-type interaction [13]. The Čerenkov THG represents the type of noncollinear frequency tripling that satisfies only the longitudinal phase-matching conditions: k 2 cos θ 1 ¼ 2k 1 for SHG and k 3 cos θ 2 ¼ k 2 cos θ 1 þ k 1 for SFM, with θ 1;2 being the Čerenkov angles for the secondharmonic (SH) and TH waves, respectively.One question is raised whether it is possible to realize cascaded frequency tripling via transverse phasematching only. It was shown recently that the propagation of a light beam in periodic NPC leads to multiorder diffraction of the SH when the transverse phase-matching condition k 2 sin α ¼ mG (m is integer) is satisfied [14][15][16], in an analogy to linear Raman-Nath diffraction [17]. Thus, one may expect the nonlinear Raman-Nath diffraction of the TH wave via transverse phase-matched SHG and SFM. However, up until now, only the purely longitudinal (Čerenkov) phase-matched THG was observed [13]. In this Letter we report for the first time on experimental observation of THG which relies on cascaded transverse (Raman-Nath) phase-matching. Moreover, we observe for the first time the THG nonlinear diffraction based on cascading of transverse and longitudinal phase-matched processes. The different phase-matching possibilities provide a set of TH rings at different angles.The annular NPC was fabricated using electric poling of a Z-cut MgO:doped stoichiometric lithium tantalate (SLT) crystal (thickness 490 μm). The period is 7:5 μm and the duty factor var...

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“…The theoretical values of the optical wavelengths are calculated using a wavelength-and temperature-independent Sellmeier equation for 0.5% MgO-doped stoichiometric LiTaO3 (MgO: LiTaO3)in the IR [18]. The Sellmeier equation for MgO:LiTaO3 of Dolev et al [18] in the IR range in a temperature range from room temperature to 200℃ can be written as and f = (T-24.5)×(T+570.82), T is the crystal temperature in ℃.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…The Sellmeier equation for MgO:LiTaO3 of Dolev et al [18] in the IR range in a temperature range from room temperature to 200℃ can be written as and f = (T-24.5)×(T+570.82), T is the crystal temperature in ℃. All the figures in this work were numerically simulated according to the Eqs (1-8) using MATLAB software.…”

Section: Theoretical Modelmentioning

confidence: 99%

Investigation of Terahertz Generation from Bulk and Periodically Poled LiTaO₃Crystal with a Cherenkov Phase Matching Scheme

Li¹,

Bing²,

Yuan³

et al. 2015

Journal of the Optical Society of Korea

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Terahertz (THz) wave generation from bulk and periodically poled LiTaO3 (PPLT) with a Cherenkov phase matching scheme is numerically investigated. It is shown that by using the crystal birefringence of bulk LiTaO3 and a grating vector of PPLT, THz waves can be efficiently generated by difference frequency generation (DFG) with a Cherenkov phase matching scheme. The frequency tuning characteristics of the THz wave via varying wavelength of difference frequency waves, phase matching angle, poling period of PPLT and working temperature are theoretically analyzed. The parametric gain coefficient in the low-loss limit and the absorption coefficient of the THz wave during the DFG process in the vicinity of polariton resonances are numerically analyzed. A THz wave can be efficiently generated by utilizing the giant second order nonlinearities of LiTaO3 in the vicinity of polariton resonances.

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Linear and nonlinear optical properties of MgO:LiTaO3

Cited by 80 publications

References 22 publications

Tailoring Čerenkov second-harmonic generation in bulk nonlinear photonic crystal

Tailoring Čerenkov second-harmonic generation in bulk nonlinear photonic crystal

Third-harmonic generation via nonlinear Raman–Nath diffraction in nonlinear photonic crystal

Investigation of Terahertz Generation from Bulk and Periodically Poled LiTaO₃Crystal with a Cherenkov Phase Matching Scheme

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Linear and nonlinear optical properties of MgO:LiTaO3

Cited by 80 publications

References 22 publications

Tailoring Čerenkov second-harmonic generation in bulk nonlinear photonic crystal

Tailoring Čerenkov second-harmonic generation in bulk nonlinear photonic crystal

Third-harmonic generation via nonlinear Raman–Nath diffraction in nonlinear photonic crystal

Investigation of Terahertz Generation from Bulk and Periodically Poled LiTaO3Crystal with a Cherenkov Phase Matching Scheme

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Investigation of Terahertz Generation from Bulk and Periodically Poled LiTaO₃Crystal with a Cherenkov Phase Matching Scheme