High-power master-oscillator power-amplifier with optical vortex output

Kim, D. J.; Kim, J. W.; Clarkson, W.A.

doi:10.1007/s00340-014-5855-5

Cited by 26 publications

(8 citation statements)

References 23 publications

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“…The annular pump approach is based on a central-null pumping configuration, which was usually obtained through axicons [34][35][36][37], capillary fiber [38][39][40][41], or center-punched mirror [42][43][44][45][46]. In 2017, Zhang et al [47] achieved a direct LG 0,1 vortex output in a Yb:MgWO 4 laser, which manifested handedness control without additional elements.…”

Section: Vortex Beam Generationmentioning

confidence: 99%

Recent Progress in Nonlinear Frequency Conversion of Optical Vortex Lasers

Liu

Duan

et al. 2022

Front. Phys.

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Optical vortices are optical fields that possess a helical phase and orbital angular momentum, which have found the application in micromanipulation, optical communication, orbital angular momentum entanglement, super-resolution imaging, metrology, etc. The urgent need for the wide spreading applications of vortex lasers is to increase the wavelength versatility. In this study, the nonlinear frequency conversion of vortex lasers with a focus on sum frequency generation stimulated Raman scattering, and optical parametric oscillators were meticulously reviewed. The characteristics of the topological charge transfer and output beam profiles of different frequency conversion were discussed. As the precise tuning of optical fields in both temporal and spatial domains shall be the trend of future studies, it is our hope that this review shall serve as a reference for future research. Combining these techniques with the streaming methods to produce optical vortices, i.e., annular pump, off-axis pump, reflection mirror with defect spots, spherical aberration, and birefringence, it is advisable to expand the wavelength and fill the wavelength gap in the ultraviolet, visible, and infrared bands.

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Section: Vortex Beam Generationmentioning

confidence: 99%

Recent Progress in Nonlinear Frequency Conversion of Optical Vortex Lasers

Liu

Duan

et al. 2022

Front. Phys.

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“…Due to the importance of high-power OAM beams and the extensive application scenarios, researchers have conducted much research on the generation of high-power OAM beams in recent years, including continuous [26][27][28][29] and pulsed [30][31][32][33][34][35] high-power OAM beams, with spectral ranges covering the visible light [22,30,31] , near infrared [26][27][28][29][32][33][34] and terahertz [35] regions. To date, efforts have been made to generate high-power OAM beams through methods including crystal lasers [26,29,30,33] , rod amplifiers [34] , fiber lasers [22,28,31] and master oscillator power amplifiers [27] . At present, the highest powers achieved in OAM beams are almost tens of watts [27,30,35] , whereas it is known that these methods cannot realize much higher power (kilowatt scale) OAM beams due to the limitations of nonlinear optical effects and the thermal effects of materials [22,26,30,31] .…”

Section: Introductionmentioning

confidence: 99%

“…To date, efforts have been made to generate high-power OAM beams through methods including crystal lasers [26, 29, 30, 33] , rod amplifiers [34] , fiber lasers [22, 28, 31] and master oscillator power amplifiers [27] . At present, the highest powers achieved in OAM beams are almost tens of watts [27, 30, 35] , whereas it is known that these methods cannot realize much higher power (kilowatt scale) OAM beams due to the limitations of nonlinear optical effects and the thermal effects of materials [22, 26, 30, 31] . Therefore, it is imperative to devise alternative techniques to access higher power OAM beams, especially using multiple beams to overcome the limitations of single lasers.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive investigation on producing high-power orbital angular momentum beams by coherent combining technology

Zhi

Hou

et al. 2019

High Pow Laser Sci Eng

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High-power orbital angular momentum (OAM) beams have distinct advantages in improving capacity and data receiving for free-space optical communication systems at long distances. Utilizing the coherent combination of a beam array technique and helical phase approximation by a piston phase array, we have proposed a generating system for a novel high-power beam carrying OAM, which could overcome the power limitations of a common vortex phase modulator and a single beam. The characteristics of this generating method and the orthogonality of the generated OAM beams with different eigenstates have been theoretically analyzed and verified. Also a high-power OAM beam produced by coherent beam combination (CBC) of a six-element hexagonal fiber amplifier array has been experimentally implemented. Results show that the CBC technique utilized to control the piston phase differences among the array beams has a high efficiency of 96.3%. On the premise of CBC, we have obtained novel vortex beams carrying OAM of $\pm 1$ by applying an additional piston phase array modulation on the corresponding beam array. The experimental results agree approximately with the theoretical analysis. This work could be beneficial to areas that need high-power OAM beams, such as ultra-long distance free-space optical communications, biomedical treatments, and powerful trapping and manipulation under deep potential wells.

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“…In recent years, many studies have attempted to generate vortex beams with higher intensity and better performance 6 . To date, two experimental methods have been mainly used to generate vortex beams: direct generation in the laser cavity [7][8][9] and indirect conversion based on a plane wave using various phase adjustors [10][11][12][13][14][15][16] . However, it is difficult to further improve the output power of vortex beams to relativistic intensity due to the limited power-handling capacity of available phase adjustors 17,18 , the challenges of nonlinear optical effects 19 , and the thermal effect that occurs during the power scaling of single-channel laser beams.…”

mentioning

confidence: 99%

Intense vortical-field generation using coherent superposition of multiple vortex beams

Guo

Zhang

et al. 2023

Sci Rep

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Coherent beam combining technology applied to multiple vortex beams is a promising method to generate high-power vortex beams. We utilize the coherent combination of multiple Laguerre-Gaussian beams at the waist plane and propose theoretically a practical generation system for a high-power beam carrying orbital angular momentum by considering oblique incidence. The results demonstrate that the orbital angular momentum distribution of the combined field is similar to that of a single Laguerre-Gaussian beam within the Rayleigh length. Moreover, the combined field has relativistic intensity local spots that exhibit stable spatial propagation. The proposed system may potentially be applied to intense vortical fields, large scale nuclear fusion device, such as suppressing stimulated Raman scattering and filamentation when a laser beam propagates in plasma.

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High-power master-oscillator power-amplifier with optical vortex output

Cited by 26 publications

References 23 publications

Recent Progress in Nonlinear Frequency Conversion of Optical Vortex Lasers

Recent Progress in Nonlinear Frequency Conversion of Optical Vortex Lasers

Comprehensive investigation on producing high-power orbital angular momentum beams by coherent combining technology

Intense vortical-field generation using coherent superposition of multiple vortex beams

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