20-W ultraviolet-beam generation by fourth-harmonic generation of an all-solid-state laser

Kojima, Toshiharu; Konno, Susumu; Fujikawa, Shuichi; Yasui, Koji; Yoshizawa, Kenji; Mori, Yusuke; Sasaki, T.; Tanaka, Mitsuhiro; Okada, Yukikatsu

doi:10.1364/ol.25.000058

Cited by 106 publications

(32 citation statements)

References 2 publications

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“…For the design of a frequency doubler, many nonlinear optical (NLO) crystals have been applied in the experimental studies (Lin et al 2012;Bhandari et al 2012;Zhang et al 2009;Gün et al 2011), including β -BaB 2 O 4 (BBO), CsLiB 6 O 10 (CLBO) and KBeBO 3 F 2 (KBBF). Yet more than 20 W 266 nm DUV power at high-repetition-rate was obtained by a CLBO crystal since 2000 (Kojima et al 2000;Sakuma et al 2004;Wang et al 2006). In particular, KBBF has the better optical performances on the cut-off wavelength.…”

Section: Introductionmentioning

confidence: 99%

Laser-induced behavior of BK7 mirror in a compound resonator on watt level DUV laser

et al. 2014

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We experimentally present an acousto-optic Q-switched, side-pumped laser generating the watt-level deep-ultraviolet (DUV) output at 266 nm. A quasi-enhanced cavity, containing a BBO crystal as the fourth harmonic generator, was employed in the compact DUV laser system. A DUV laser with the average power of 1.08 W was achieved after careful alignment of the resonator. Our experimental results demonstrated that the DUV power was very sensitive to the misalignment of a cavity mirror. It was attributed to the thermal effect in BK7 mirror induced by high green power, by which the beam radius of green light was compressed in the compound resonator.

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Section: Introductionmentioning

confidence: 99%

Laser-induced behavior of BK7 mirror in a compound resonator on watt level DUV laser

et al. 2014

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“…T. Kojima et al [3] presented a 20.5 W UV beam generation by fourth-harmonic generation with a 106 W green laser at the pulse repetition rate of 10 kHz, and the pulse duration was 46 ns. The CsLiB 6 O 10 (CLBO) crystal was used in the experiment.…”

Section: Introductionmentioning

confidence: 99%

High power all-solid-state fourth harmonic generation of 266 nm at the pulse repetition rate of 100 kHz

Liu

Yan

2009

Laser Phys. Lett.

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14.8 W UV laser at 266 nm was reported with the extra cavity frequency quartered configuration. The fundamental frequency IR source is a high-power high-beam-quality acousticoptic Q-switched Nd:YVO 4 master-oscillator-power-amplifier laser. The type-I phase-matched LBO and type-I phase-matched BBO crystals were used as the extra-cavity frequency doubled and quartered crystal respectively. 14.8 W UV laser of 266 nm was obtained at the pulse repetition rate of 100 kHz with the conversion efficiency of 18.3% from green to UV, and the pulse duration of the UV laser was 10 ns corresponding to the pulse peak power of 14.8 kW. At 150 kHz, 11.5 W power output was obtained. The highest peak power of 21 kW was also achieved at 80 kHz with the average output power of 14.5 W.

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“…At present, both at home and abroad, researches of the LD-pumped 355 nm lasers are mainly carried out on the continuous or high repetition rate quasi-continuous wave UV lasers [1][2][3][4][5][6][7], which focusing on improving the average output power of UV laser, and the peak power is only a few to tens of kW. As far as we know, few work are reported on the UV pulse laser at 355 nm with a pulse width less than 10 ns and a peak power at megawatt level.…”

Section: Introductionmentioning

confidence: 99%

Electro-optical Q-switch low-repetition-rate narrowpulse-width UV pulse laser at 355 nm generated by pulsed-diode-pumped Nd:YAG

Bai

Shen

et al. 2009

Laser Phys. Lett.

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Abstract:We report an electro-optical Q-switch ultraviolet laser at 355 nm with narrow width and low repetition rate generated by pulsed-diode side-pumped Nd:YAG/KTP/LBO. The single-pulse energy is measured to be 18.7 mJ with a pulse-width of 7.32 ns at a repetition rate of 1 Hz and a pump current of 120 A. We can obtain the output laser of 1064 nm, 532 nm, and 355 nm simultaneously by using a volume of beam splitting mirrors, and the average output power of the three lasers are measured to be 589.8 mW, 305.6 mW, and 218.2 mW, respectively, corresponding to a conversion efficiency of 12.69% from 1064 nm to 355 nm.355 nm ultraviolet laser spot photo

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20-W ultraviolet-beam generation by fourth-harmonic generation of an all-solid-state laser

Abstract: We have obtained UV power of 20.5 W with a repetition rate of 10 kHz by the use of a high-brightness high-power all-solid-state green laser and a high-quality CsLiB(6)O(10) crystal. This power is, to our knowledge, the highest UV power achieved so far in all-solid-state lasers.

Cited by 106 publications

References 2 publications

Laser-induced behavior of BK7 mirror in a compound resonator on watt level DUV laser

Laser-induced behavior of BK7 mirror in a compound resonator on watt level DUV laser

High power all-solid-state fourth harmonic generation of 266 nm at the pulse repetition rate of 100 kHz

Electro-optical Q-switch low-repetition-rate narrowpulse-width UV pulse laser at 355 nm generated by pulsed-diode-pumped Nd:YAG

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