Nonlinear generation of a neat semi-Gaussian laser beam with a transversely varying periodically-poled LiTaO_3 crystal

Yin, Yin; Lv, Xing; Zhao, Lina; Cao, Jingxiao; Yuan, Ye; Zhang, Chao; Leng, H. Y.; Xie, Zhenda; Xu, Ping; Zhao, Gang; Zhu, Shining

doi:10.1364/oe.19.005297

Cited by 8 publications

(7 citation statements)

References 24 publications

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“…The SGB has a waist radius of 𝑤 SGB = 20 µm and a sharp border width of 𝑤 𝐵 = 1.2 µm. [13,14] The intensity profile of the SGB in the 𝑧 direction is a semi-Gaussian one. The deceleration principle will be introduced in detail in the following.…”

Section: (B) a Well-collimatedmentioning

confidence: 99%

A Multistage Optical Stark Decelerator for use with a Pulsed Molecular Beam with an Electrostatic Storage Ring

Xia¹,

Yin²,

Xiang³

et al. 2012

Chinese Phys. Lett.

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We propose a promising scheme to repeatedly decelerate a pulsed molecular beam using a red-detuned quasi-cw semi-Gaussian laser beam (SGB) and an electrostatic storage ring. Using the Monte-Carlo simulation method, we demonstrate that this promising optical Stark decelerator can be used to efficiently slow a pulsed ND3 molecular beam extracted from a Stark decelerator or a cryogenic reservoir by using a single SGB. The deceleration effect of this scheme on the intensity of the SGB is discussed in detail.

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Section: (B) a Well-collimatedmentioning

confidence: 99%

A Multistage Optical Stark Decelerator for use with a Pulsed Molecular Beam with an Electrostatic Storage Ring

Xia¹,

Yin²,

Xiang³

et al. 2012

Chinese Phys. Lett.

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“…Nonlinear photonic crystals, also known as quasi-phase matching (QPM) media, feature a spatial modulation of the second-order nonlinearity of the host materials. [1][2][3][4][5][6][7][8][9] This modulation provides synchronization of phase velocities of optical waves at different DOI: 10.1002/lpor.202000224 frequencies, such that they can efficiently exchange energy. Meanwhile, the spacedependent nonlinearity allows controlling over the wavefront of the nonlinear interacting waves, which has inspired wide applications in novel light sources, nonlinear data processing, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Taking the second harmonic generation (SHG) as an example, the nonlinearity modulation maps the interference between the nonlinear polarization wave (with a doubling of the wave vector of the fundamental beam) and the second harmonic (SH) of required shape, e.g., Bessel, vortex, Airy beam etc. [ 17,19,21 ] The holographic χ (2) nonlinearity patterning has been commonly achieved by either ferroelectric domain inversion (electrical poling), [ 8–10 ] or laser‐induced partial amorphization of the crystal. [ 24,25 ] However, while the original pattern is a continuous in space, the corresponding nonlinearity distribution is of binary character, as in binary computer generated holograms.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Volume Holography in 3D Nonlinear Photonic Crystals

Liu

Mazur

Królikowski

et al. 2020

Laser & Photonics Reviews

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Nonlinear photonic crystals (NPCs) are transparent materials with a space-dependent (often periodic) second-order nonlinearity, which have been used extensively for the generation and control of coherent light at new frequencies. Thanks to recently introduced fabrication techniques capable of 3D nonlinearity engineering, explorations of nonlinear wave interaction with improved or unique functionalities of 3D configurations become possible. Here, the experimental example of nonlinear volume holography based on 3D NPCs is presented. The 3D modulation of nonlinearity enables reconstruction of optical beams at new frequency with predesigned phase and amplitude structures. Furthermore, a simultaneous synchronization of phase velocities of the fundamental reading beam and the generated new frequency beam ensures increased conversion efficiency. A proof-of-concept nonlinear holographic reconstruction of second harmonic vortex beam is obtained with an optically induced 3D nonlinear volume hologram in ferroelectric calcium barium niobate crystal. The results show the nonlinear volume holography based on 3D NPC provides a novel promising approach for efficient realization of optical complex beams at new frequencies, paving the way for applications in all-optical signal processing, super-resolution imaging, and 3D laser displays.

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“…Depending on the geometry of interaction, the QPM can be implemented through the schemes of nonlinear Bragg diffraction 15 , Čerenkov-type 16 emission and nonlinear Raman-Nath diffractions 17 . In these NPCs the wavefront shaping often relies on transversely patterned nonlinearity, i.e., χ (2) varies spatially (typically between +| χ (2) | and −| χ (2) |) in a plane perpendicular to the propagation direction of the incident beam 18–20 . In this respect, the transverse χ (2) modulation plays a role analogous to that of spatial variation of refractive index in linear optical media.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear wavefront shaping with optically induced three-dimensional nonlinear photonic crystals

Liu¹,

Switkowski²,

Xu³

et al. 2019

Nat Commun

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Generation of coherent light with desirable amplitude and phase profiles throughout the optical spectrum is a key issue in optical technologies. Nonlinear wavefront shaping offers an exceptional way to achieve this goal by converting an incident light beam into the beam (or beams) of different frequency with spatially modulated amplitude and phase. The realization of such frequency conversion and shaping processes critically depends on the matching of phase velocities of interacting waves, for which nonlinear photonic crystals (NPCs) with spatially modulated quadratic nonlinearity have shown great potential. Here, we present the first experimental demonstration of nonlinear wavefront shaping with three-dimensional (3D) NPCs formed by ultrafast-light-induced ferroelectric domain inversion approach. Compared with those previously used low-dimensional structures, 3D NPCs provide all spatial degrees of freedom for the compensation of phase mismatch in nonlinear interactions and thereby constitute an unprecedented system for the generation and control of coherent light at new frequencies.

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Nonlinear generation of a neat semi-Gaussian laser beam with a transversely varying periodically-poled LiTaO_3 crystal

Cited by 8 publications

References 24 publications

A Multistage Optical Stark Decelerator for use with a Pulsed Molecular Beam with an Electrostatic Storage Ring

A Multistage Optical Stark Decelerator for use with a Pulsed Molecular Beam with an Electrostatic Storage Ring

Nonlinear Volume Holography in 3D Nonlinear Photonic Crystals

Nonlinear wavefront shaping with optically induced three-dimensional nonlinear photonic crystals

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