Enhanced 355-nm generation using a simple method to compensate for walk-off loss

Jung, Chanho; Shin, Woojin; Yu, Bong-Ahn; Lee, Y. L.; Noh, Young‐Chul

doi:10.1364/oe.20.000941

Cited by 22 publications

(7 citation statements)

References 10 publications

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“…High stable, high efficient ultraviolet laser with angle-phase-mismatching compensation by adjusting temperature of the nonlinear crystals Houwen Yang 1,2 , Bo Wang 3 , Junhua Wang 1,2 , Xiaofang Li 1,2 , Zhaojun Liu 2 and Wenyong Cheng 1,4 stability laser. However, extra-cavity frequency conversion requires the high-peak-power fundamental laser, which is unsuitable for low pump power [4][5][6][7][8][9].…”

Section: Laser Physics Lettersmentioning

confidence: 99%

High stable, high efficient ultraviolet laser with angle-phase-mismatching compensation by adjusting temperature of the nonlinear crystals

Yang

Wang

et al. 2017

Laser Phys. Lett.

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We demonstrated an ultraviolet laser at 355 nm using a type-I and a type-II phase-matching nonlinear optical crystal of LiB 3 O 5 (LBO). A method of adjusting temperature for compensation is presented. The crystal temperature is controlled by proportional integral derivative (PID) thermal controllers with a ±0.01 °C resolution. The value of wave vector mismatch, distance of light propagation in nonlinear crystals, effective nonlinear coefficient, theoretical analysis and calculation of conversion efficiency versus temperature are discussed. The experimental results show that the average output power of the 355 nm laser is 1.24 W with the pump power of 13.33 W, when the repetition frequency is 15 kHz. The pulse duration is 9.8 ns, and the beam quality factors are of M x 2 = 1.8, M y 2 = 1.7. The conversion efficiency from 808 nm to 355 nm laser is 9.3%, which nearly reaches the optimum value reported so far and is limited by the wavelength mismatch between the pumping and absorbing lasers. The 355 nm output power instability of the laser device is 0.45% in 2 h. A compact no-watercooling ultraviolet laser with high stability and high efficiency is obtained.

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Section: Laser Physics Lettersmentioning

confidence: 99%

High stable, high efficient ultraviolet laser with angle-phase-mismatching compensation by adjusting temperature of the nonlinear crystals

Yang

Wang

et al. 2017

Laser Phys. Lett.

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“…求的目标，但在一定程度上受制于 355 nm 紫外激光的输出功率和光束质量，因此研究高功率和高光束质量的 355 nm 紫外激光器势在必行 [7][8][9] 。目前，获得 355 nm 的基频光激光介质主要有 Nd:YAG [5， 8-10] 和 Nd:YVO4 [4， 6， 11] 晶体，由于 Nd:YVO4 晶体不易生长大尺寸，只适用于激光二极管(LD)端面抽运方式，成本较高，热导率低，大功率抽运时热效应严重，而 Nd:YAG 晶体则可以避免上述问题，适于 LD 侧面抽运，目前已经实现了 160 W、 355 nm 激光输出 [10] [12]…”

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Study on a High Power QCW 355 nm Laser Diode Pumped Solid State Laser

Ming¹,

Fei²,

Yuyao³

et al. 2014

激光与光电子学进展

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A laser diode(LD) side pumped acousto-optic Q-switched Nd:YAG solid state 355 nm ultraviolet laser is reported by using intra cavity double frequency and sum frequency mixing. The Nd:YAG crystal is sidepumped by a LD, the intra cavity green radiation is generated using a type I non-critical phase matched littium triborate (LBO) and subsequent frequency mixing in two type II LBO crystals. A high power and high repetition rate 355 nm ultraviolet laser is obtained by sum frequency mixing back and forth. The output power of 15.3 W at 355 nm is obtained at the pump power of 939.6 W and repetition frequency of 8 kHz with pulse width as short as 90 ns. The conversion efficiency is 1.63%. The beam quality M 2 x , M 2 y is 4.33 and 4.56, respectively, and the degree of power instability is ±2.7%.

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“…By contrast, Pr 3+ :YLF has attracted much attention because of its ability to directly generate lasers at visible wavelengths (522 nm, 604 nm, 607 nm, 639 nm, and 720 nm) [18][19][20][21][22]. Pr 3+ :YLF visible light laser is not limited by the nonlinear crystal and avoids the problems of the high sensitivity of phase matching [23], space deviation [24], thermal lens effect of nonlinear crystal [25], and laser-induced damage [26]. Metz et al pumped Pr 3+ :YLF using an OPSL pump source with a maximum output power of 5 W, reaching an output power of 2.9 W at 523 nm, with a slope efficiency of 72% and an opto-optical efficiency of 67% [27].…”

Section: Introductionmentioning

confidence: 99%

522 nm single-longitudinal-mode high-frequency Pr³⁺:YLF laser based on pre-lase Q-switching technology

Meng¹,

Jin²,

Liu³

et al. 2022

Laser Phys.

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In this work, based on the pre-lase Q-swiching technology, a single-longitudinal-mode (SLM) pulsed laser that can be emitted directly into the green spectral region at 522 nm is demonstrated for the first time. The rate equation of 522 nm Pr3+:YLF SLM Q-switched laser is established, and the output characteristics of the laser are obtained by simulation. The peak power of 37.9 W was obtained under an incident pump power of 12 W at 444 nm. At a repetition frequency of 20 kHz, the laser pulse energy and the pulse width were measured to be 3.05 μJ and 80.5 ns, respectively. The corresponding spectral linewidth is approximately 22 MHz.

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Enhanced 355-nm generation using a simple method to compensate for walk-off loss

Cited by 22 publications

References 10 publications

High stable, high efficient ultraviolet laser with angle-phase-mismatching compensation by adjusting temperature of the nonlinear crystals

High stable, high efficient ultraviolet laser with angle-phase-mismatching compensation by adjusting temperature of the nonlinear crystals

Study on a High Power QCW 355 nm Laser Diode Pumped Solid State Laser

522 nm single-longitudinal-mode high-frequency Pr³⁺:YLF laser based on pre-lase Q-switching technology

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Enhanced 355-nm generation using a simple method to compensate for walk-off loss

Cited by 22 publications

References 10 publications

High stable, high efficient ultraviolet laser with angle-phase-mismatching compensation by adjusting temperature of the nonlinear crystals

High stable, high efficient ultraviolet laser with angle-phase-mismatching compensation by adjusting temperature of the nonlinear crystals

Study on a High Power QCW 355 nm Laser Diode Pumped Solid State Laser

522 nm single-longitudinal-mode high-frequency Pr3+:YLF laser based on pre-lase Q-switching technology

Contact Info

Product

Resources

About

522 nm single-longitudinal-mode high-frequency Pr³⁺:YLF laser based on pre-lase Q-switching technology