Numerical investigation on the generation of high-order Laguerre–Gaussian beams in end-pumped solid-state lasers by introducing loss control

Hu, Ang; Lei, Jian; Chen, Peifeng; Wang, Ying; Li, Shumo

doi:10.1364/ao.53.007845

Cited by 19 publications

(11 citation statements)

References 27 publications

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“…In this way, the OAM value and helicity could be controlled. Loss control, while offering flexibility in design, is not optimal for laser mode control. Rather than introduce additional losses one can follow the approach of introducing preferential gain .…”

Section: Structured Light Lasersmentioning

confidence: 99%

Structured Light from Lasers

Forbes

2019

Laser & Photonics Reviews

232

126

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Structured light is derived from the ability to tailor light, usually referring to the spatial control of its amplitude, phase, and polarization. Although a venerable topic that dates back to the very first laser designs, structuring light at the source has seen an explosion in activity over the past decade, fuelled by a modern toolkit that exploits the versatility of diffractive structures, liquid crystals, metasurfaces/metamaterials, and exotic laser geometries, as well as a myriad of applications that range from imaging, microscopy, and laser material processing to optical communication. Here, the recent progress in creating and controlling structured light is reviewed, with particular emphasis on structuring light at the source: structured light lasers. The various design approaches, including pump shaping, cavity geometries, and the use of custom intracavity optical elements, implemented in a variety of lasers from microchip solutions to high‐power fibers are covered in a tutorial style. The history and latest developments in the field are reviewed, elucidating the various structured light patterns that have been created from lasers, including orbital angular momentum and vector states of light. Finally, the present challenges and limitations are highlighted, along with comments on likely future trends.

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Section: Structured Light Lasersmentioning

confidence: 99%

Structured Light from Lasers

Forbes

2019

Laser & Photonics Reviews

232

126

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“…We simulate the laser oscillation from noise with the different radiuses of ring-shaped pump or different expansion ratios of BE using the method proposed in Ref. [51]. Firstly, we set the expansion ratio of BE as 4.…”

Section: Mode Competition In a Regenerative Amplifiermentioning

confidence: 99%

High-gain amplification for femtosecond optical vortex with mode-control regenerative cavity

et al. 2020

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Ultra-intense femtosecond vortex pulses can provide an opportunity to investigate the new phenomena with orbital angular momentum (OAM) involved in extreme cases. This paper reports a high gain optical vortex amplifier for intense femtosecond vortex pulses generation. Traditional regeneration amplifiers can offer high gain for Gaussian mode pulses but cannot amplify optical vortex pulses while maintaining the phase singularity because of mode competition. Here, we present a regeneration amplifier with a ringshaped pump. By controlling the radius of the pump, the system can realize the motivation of LG0,1(-1) mode and the suppression of Gaussian mode. Without seeds, the amplifier has a donut-shaped output containing two opposite OAM states simultaneously, as our prediction by simulation. If seeded a pulse of a topologic charge of 1 or-1, the system will output an amplified LG0,1(-1) mode pulse with the same topologic charge as the seed. To our knowledge, this amplifier can offer the highest gain as 1.45×10 6 for optical vortex amplification. Finally, we obtain a 1.8 mJ, 51 fs compressed optical vortex seeded from a 2 nJ optical vortex.

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“…The output mode in a laser resonator is usually a superior eigen mode in gain competition [68], the principle of which has guided many researchers to realize direct HG and LG output from resonator by using various selective pumping methods [67,[69][70][71][72][73]. However, the intrinsic symmetry is actually influenced by complex factors such as cavity design, off-axis displacement [67,72,73], gain and thermal distributions [74,75], as well as astigmatism effects of pump light [46,50,75], all of which can contribute to actual laser output mode.…”

Section: Eigen Mode Output In Laser Resonatorsmentioning

confidence: 99%

Hybrid topological evolution of multi-singularity vortex beams: generalized nature for helical-Ince–Gaussian and Hermite–Laguerre–Gaussian modes

Shen

Meng

et al. 2019

J. Opt. Soc. Am. A

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A generalized family of scalar structured Gaussian modes including helical-Ince-Gaussian (HIG) and Hermite-Laguerre-Gaussian (HLG) beams is presented with physical insight upon a hybrid topological evolution nature of multi-singularity vortex beams carrying orbital angular momentum (OAM). Considering the physical origins of intrinsic coordinates aberration and the Gouy phase shift, a closed-form expression is derived to characterize the general modes in astigmatic optical systems. Moreover, a graphical representation, Singularities Hybrid Evolution Nature (SHEN) sphere, is proposed to visualize the topological evolution of the multi-singularity beams, accommodating HLG, HIG and other typical subfamilies as characteristic curves on the sphere surface. The salient properties of SHEN sphere for describing the precise singularities splitting phenomena, exotic structured light fields, and Gouy phase shift are illustrated with adequate experimental verifications.

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Numerical investigation on the generation of high-order Laguerre–Gaussian beams in end-pumped solid-state lasers by introducing loss control

Cited by 19 publications

References 27 publications

Structured Light from Lasers

Structured Light from Lasers

High-gain amplification for femtosecond optical vortex with mode-control regenerative cavity

Hybrid topological evolution of multi-singularity vortex beams: generalized nature for helical-Ince–Gaussian and Hermite–Laguerre–Gaussian modes

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