The influences of amplified spontaneous emission, crystal temperature and round-trip loss on scaling of CW thin-disk laser

Shang, Jianli; Zhu, Xiao; Zhu, Guangping; Wang, Wei

doi:10.1016/j.optlastec.2011.12.030

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…[67] The main effects of ASE on laser amplification include depleting the population density of the upper laser manifold, [68,154,156,159] generating parasitic lasing, [160,161] significantly reducing the gain of the laser, [87] and thermal distortion effects. [154,162] The Monte Carlo type ray-trace technique [68,87,92,154,163,164] and the finite element analysis technique [165,166] are commonly used to analyze the ASE effect and suppress the ASE. [68,164,[167][168][169][170] For the suppression of ASE, the primary purpose is to limit the oscillation of SE.…”

Section: Ase Suppressionmentioning

confidence: 99%

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High‐Power Laser Systems

Zuo

Xin

2022

Laser & Photonics Reviews

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High‐power laser sources are widely used in industrial precision processing and act as a new platform for strong‐field physics research using peak power over petawatt. This review focuses on realizing high‐energy solid‐state disk and slab systems and the nonlinear‐suppression strategies for high‐power fiber systems using the functional fibers. First, the implementations and enabling technologies of the solid‐state lasers for increasing peak power from gigawatt to petawatt are reviewed. Then the mechanisms and suppression strategies of the deterioration effects (including stimulated Raman scattering, stimulated Brillouin scattering, and transverse mode instability) in various fiber amplifiers are analyzed. At the same time, the mechanism and achievements of the current functional fibers are introduced. Finally, the challenges and perspectives of high‐power solid‐state and fiber amplifiers are summarized.

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Section: Ase Suppressionmentioning

confidence: 99%

“…The Monte Carlo type ray‐trace technique [ 68,87,92,154,163,164 ] and the finite element analysis technique [ 165,166 ] are commonly used to analyze the ASE effect and suppress the ASE. [ 68,164,167–170 ] For the suppression of ASE, the primary purpose is to limit the oscillation of SE.…”

Section: Solid‐state Lasers With High‐peak‐powermentioning

confidence: 99%

High‐Power Laser Systems

Zuo

Xin

2022

Laser & Photonics Reviews

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“…For highenergy laser systems, where high inversion is crucial, additional transparent, so called 'anti-ASE caps' are used to avoid trapping of the spontaneous emission within the amplifying disk. There are a number of publications on ASE in disk lasers, mostly relying on ray-tracing for the ASE and the rate equation for the laser process, for various geometries, sometimes also taking into account the temperature [50,[91][92][93][94][95][96][97][98][99].…”

Section: Nonlinear Effects and Limitationsmentioning

confidence: 99%

High-power, high-brightness solid-state laser architectures and their characteristics

et al. 2022

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The development of high-power diode lasers enabled new solid-state laser concepts such as thin-disk, fiber, and Innoslab lasers based on trivalent ytterbium as the laser-active ion, which resulted in a tremendous increase in the efficiency and beam quality of cw lasers compared to previously used lamp-pumped rod or slab lasers and the realization of ultrafast lasers with several 100 W or even kilowatts of average power. In addition to their beneficial thermo-optical properties, these architectures offer characteristic benefits making them especially suitable to obtain dedicated laser properties. This review article comprises milestone developments, characteristic challenges, and benefits, and summarizes the state of the art of high-power solid-state lasers with the focus on ultrafast lasers.

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“…where, τ 0 is the fluorescence lifetime of the manifold 2 F 5/2 , r is the distance between the receiver and emitter position of the fluorescence, dV is the volume element around the emitter position, and δv is the frequency step. According to Equations ( 1)- (11), the temperature at the edge side of the thin disk crystal can be simulated by using the finite element analysis method with the help of COMSOL. It has to be mentioned that when there is no laser output, the parameter λ f is calculated by iteration of the central temperature of the thin disk crystal (obtained by the finite element method).…”

Section: E Eoretical Analyze and Numerical Simulation Of The Edge Rad...mentioning

confidence: 99%

“…Due to the randomness of spontaneous emission uorescence and the coupling between gain distribution, temperature distribution, and uorescence ux distribution, the calculation process is very complicated. In order to simplify the model, the researchers used many methods to theoretically analyze the transmission process and fluorescence characteristics of edge-radiated fluorescence in disk lasers, such as the analytical method [9], semianalytical method [10], finite element analysis method [11], Monte Carlo method [12]. However, since the radiation range of edge-radiated fluorescence covers the entire solid angle of 2π (hemisphere region) [13], it is difficult to measure it directly by conventional methods, and the current research on edge-radiated fluorescence in disk lasers is still at the stage of theoretical analysis.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence Radiation and Thermal Effect at the Edge of the Disk-Shaped Laser Crystal

Chen

Chen²,

Huang³

et al. 2022

International Journal of Optics

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The fluorescence radiation property at the edge of the thin disk crystal is very important to the design of thin disk lasers. In order to study this effect, in this paper, we established a theoretical model to describe the edge fluorescence radiation process in thin disk lasers. Subsequently, we used a thin disk crystal with indium absorption cladding to quantitatively test the edge fluorescence intensity. The significant difference between measured and simulated data can be described as P (probability value) < 0.1 at the edge when the measured temperature is lower than the melting point of the metal cladding, and P < 0.05 at the pump area. Finally, we analyze the influence of the edge fluorescence radiation on the thin disk laser operation, and the results show that the edge thermal effect will reduce the conversion efficiency of the disk laser by 20%. To the best of our knowledge, this is the first quantitative study on the edge radiation intensity of disk lasers. The research can provide theoretical guidance for the designing and packaging process of crystal elements in thin disk lasers.

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The influences of amplified spontaneous emission, crystal temperature and round-trip loss on scaling of CW thin-disk laser

Cited by 10 publications

References 28 publications

High‐Power Laser Systems

High‐Power Laser Systems

High-power, high-brightness solid-state laser architectures and their characteristics

Fluorescence Radiation and Thermal Effect at the Edge of the Disk-Shaped Laser Crystal

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