Generation of one-dimensional vortex-arrays with tunable singularity and high peak power in a passively Q-switched microchip laser

Wang, Xiaocan; Bai, Shengchuang; Pan, Yue; Lin, Bohan; Dong, Jun

doi:10.1016/j.optlastec.2021.107367

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…[ 31 ] 1D optical vortex arrays with tunable singularities and high peak power have been generated in a passively Q‐switched microchip laser pumped with a decentered annular beam. [ 32 ] The astigmatic mode converter (AMC) has been widely used to convert Laguerre–Gaussian in form of zero radial index and l azimuthal index (LG 0, l ) petal‐like laser into crisscross vortex‐arrays superpositioned with two orthogonal Hermite–Gaussian (HG) modes in the form of HG l ,0 +e − i π/2 HG 0, l . [ 33 ] Crisscross vortex arrays have well‐defined arrangements of vortices, are ideal light sources for efficiently manipulating multiple microparticles, assemble microprocessing, and optical communications.…”

Section: Introductionmentioning

confidence: 99%

“…[31] 1D optical vortex arrays with tunable singularities and high peak power have been generated in a passively Q-switched microchip laser pumped with a decentered annular beam. [32] The astigmatic mode converter (AMC) has been widely used to convert Laguerre-Gaussian in form of zero radial index and l azimuthal index (LG 0,l ) petal-like laser into crisscross vortex-arrays superpositioned with two orthogonal Hermite-Gaussian (HG) modes in the form of HG l,0 þe Àiπ/2 HG 0, DOI: 10.1002/adpr.202200293 Broadband vortex arrays distributed in 2D n Â n vortices are extremely needed for multiple microparticle manipulation, high-capacity optical communication, and quantum information. Vortex arrays are usually generated with spatial light modulators, metamaterials; it is a big challenge to improve beam quality and output power.…”

Section: Introductionmentioning

confidence: 99%

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Broadband 2D n × n Vortex Arrays Generated from an Efficient Petal‐Like Raman Laser with an Astigmatic Mode Convertor

Miao

Zhang

Chen

et al. 2023

Advanced Photonics Research

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Crisscross vortex arrays have well-defined arrangements of vortices, are ideal light sources for efficiently manipulating multiple microparticles, assemble microprocessing, and optical communications. However, the output power of crisscross vortex arrays is low and laser operating wavelength is limited by the narrow emission spectrum of Nd:YVO 4 crystal.The operating wavelength of optical vortex arrays expands their applications and various methods such as frequency doubling; stimulated Raman scattering (SRS) effect was applied for

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Broadband 2D n × n Vortex Arrays Generated from an Efficient Petal‐Like Raman Laser with an Astigmatic Mode Convertor

Miao

Zhang

Chen

et al. 2023

Advanced Photonics Research

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Tunable vortex beams generation in visible band via Pr3+:YLF laser with a spot defect

Zhang,

Qi,

Sheng

et al. 2023

Applied Physics Letters

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The generation of optical vortex beams with user-configurable topological charge and spatial profile is a topic of intense research due to the numerous potential applications for these types of laser beams. In this work, we demonstrate the direct generation of vortex laser beams with controllable topological charge and tunable spatial profile from a Pr3+:YLF laser cavity using a spot-defect technique. A theoretical model is established to examine the relationship between the topological charge of the generated vortex beam and how this relates to laser cavity parameters. Experimentally, the selective operation of first- and second-order vortex beams and tunable optical vortex lattices with one to four singularities at 607 nm can be achieved by adjusting the position of the defect spot. This work offers insight into methods for the generation of visible optical vortex beams with controllable topological charge and tunable singularities for a range of applications.

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Controlled generation of mode-switchable nanosecond pulsed vector vortex beams from a Q-switched fiber laser

Zhao

et al. 2022

Opt. Express

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We reported and demonstrated a ring Q-switched Ytterbium-doped fiber laser that can generate mode-switchable nanosecond pulsed vector vortex beams between two different orders. In the spatial optical path of the fiber laser, several cascaded Q-plates, divided into two Q-plate groups, are applied for intracavity mode conversion between LP01 mode and vector vortex beams. In one Q-plate group, two quarter-wave plates are inserted to achieve the addition and subtraction of the order of Q-plates. By tuning the polarization state in the cavity, mode-switchable vector vortex beams (VVBs), including cylindrical vector beams (CVBs), elliptically polarized cylindrical vector beams (EPCVBs), and vortex beams, of two different orders can be generated on demand. The experimental results show that by using the group of 1st and 3rd orders Q-plates, the 2nd and 4th orders mode-switchable VVBs (vortex beams with topological charges of ±2, ±4, CVBs and EPCVBs of 2nd- and 4th-order) can be obtained from the fiber laser. The slope efficiency, pulse width, and repetition rate are 33.4%, 360 ns, and 241kHz respectively. To the best of our knowledge, this is the first time to realize the direct generation of mode-switchable VVBs on the arbitrary position of the higher-order Poincaré sphere between two different orders from a fiber laser. This work lays the foundation for the flexible generation of arbitrary modes of VVBs with multiple different orders in the laser cavity.

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Generation of one-dimensional vortex-arrays with tunable singularity and high peak power in a passively Q-switched microchip laser

Cited by 8 publications

References 36 publications

Broadband 2D n × n Vortex Arrays Generated from an Efficient Petal‐Like Raman Laser with an Astigmatic Mode Convertor

Broadband 2D n × n Vortex Arrays Generated from an Efficient Petal‐Like Raman Laser with an Astigmatic Mode Convertor

Tunable vortex beams generation in visible band via Pr3+:YLF laser with a spot defect

Controlled generation of mode-switchable nanosecond pulsed vector vortex beams from a Q-switched fiber laser

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