Megawatt peak power, 1 kHz, 266 nm sub nanosecond laser source based on single-crystal fiber amplifier

Deyra, Loïc; Martial, Igor; Balembois, François; Diderjean, Julien; Georges, Patrick

doi:10.1007/s00340-013-5376-7

Cited by 10 publications

(8 citation statements)

References 8 publications

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“…So far, there has still not been a commercial ps DUV DPSSL product capable of providing a mJ-level output with a <10 ps duration at kHz repetition rates. Recently, a powerful DUV ps laser was reported that generated pulses with a peak power of > megawatt (MW) level [8] at 1 kHz. A multi-MW output was also reported with a pulse energy close to one mJ, but suffered from low repetition rates [9].…”

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confidence: 99%

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Multi-mJ, kHz, ps deep-ultraviolet source

Chang¹,

Krogen²,

Liang³

et al. 2015

Opt. Lett.

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We demonstrate a 0.56-GW, 1-kHz, 4.2-ps, 2.74-mJ deep-ultraviolet (DUV) laser at ∼257.7 nm with a beam propagation factor (M2) of ∼2.54 from a frequency-quadrupled cryogenic multi-stage Yb-doped chirped-pulse amplifier. The frequency quadrupling is achieved using LiB3O5 and β-BaB2O4 crystals for near-infrared (NIR)-to-green and green-to-DUV conversion, respectively. An overall NIR-to-DUV efficiency of ∼10% has been achieved, which is currently limited by the thermal-induced phase mismatching and the DUV-induced degradation of transmittance. To the best of our knowledge, this is the highest peak-power picosecond DUV source from a diode-pumped solid-state laser operating at kHz repetition rates.

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confidence: 99%

“…3, two crystals, β-BaB 2 O 4 (BBO) and CsLiB 6 O 10 (CLBO) [8], have shown high efficiencies. However, CLBO is highly hydroscopic and also subject to micro-cracks, making it less practical than BBO.…”

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confidence: 99%

Multi-mJ, kHz, ps deep-ultraviolet source

Chang¹,

Krogen²,

Liang³

et al. 2015

Opt. Lett.

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“…Regarding the FHG into the DUV region, only two crystals, β-BaB 2 O 4 (BBO) and CsLiB 6 O 10 (CLBO) [1], have shown record efficiencies. However, since CLBO is highly hygroscopic and thus difficult to use, we choose a BBO crystal for its excellent nonlinear coefficient of ~1.7 pm/V and high damage threshold of 10 J/cm 2 (1 ns) and 7 GW/cm 2 (0.25 ps) for green.…”

Section: Resultsmentioning

confidence: 99%

“…For practical applications and commercialization, the development of both high peak and average power picosecond DUV lasers based on diodepumped solid-state laser systems is critical. Recently the generation of powerful DUV pulses with a peak power of >MW level [1] and a repetition rate at kHz level [2] has been demonstrated. In this paper, we report on the development of a multi-mJ, ~9 ps, 257.25 nm DUV laser at 1 kHz based on frequency quadrupling of 33 mJ, 17 ps, 1029 nm infrared (IR) laser pulses, generated from a diode-pumped, ultrafast cryogenic Yb:YAG chirped-pulse amplifier (CPA) laser system.…”

Section: Introductionmentioning

confidence: 99%

Multi-mJ, kHz intense picosecond deep ultraviolet source based on a frequency-quadrupled cryogenic Yb:YAG laser

Chang

Hong

Krogen

et al. 2014

Advanced Solid State Lasers

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“…The optimum phase-matching temperature does not change as a function of input power, indicating that thermal effects do not induce a thermal gradient larger than the crystal thermal acceptance [16].…”

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confidence: 96%

Deep-UV 2365 nm laser by fourth-harmonic generation of a single-crystal fiber Nd:YAG oscillator

et al. 2014

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We demonstrate a deep-UV laser at 236.5 nm based on extracavity fourth-harmonic generation of a Q-switched Nd:YAG single-crystal fiber laser at 946 nm. We first compare two nonlinear crystals available for second-harmonic generation: LBO and BiBO. The best results at 473 nm are obtained with a BiBO crystal, with an average output power of 3.4 W at 20 kHz, corresponding to a second-harmonic generation efficiency of 38%. This blue laser is frequency-converted to 236.5 nm in a BBO crystal with an overall fourth-harmonic generation yield of 6.5%, corresponding to an average output power of 600 mW at 20 kHz. This represents an order of magnitude increase in average power and energy compared to previously reported pulsed lasers at 236.5 nm. This work opens the possibility of LIDAR detection of dangerous compounds for military or civilian applications.

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Megawatt peak power, 1 kHz, 266 nm sub nanosecond laser source based on single-crystal fiber amplifier

Cited by 10 publications

References 8 publications

Multi-mJ, kHz, ps deep-ultraviolet source

Multi-mJ, kHz, ps deep-ultraviolet source

Multi-mJ, kHz intense picosecond deep ultraviolet source based on a frequency-quadrupled cryogenic Yb:YAG laser

Deep-UV 2365 nm laser by fourth-harmonic generation of a single-crystal fiber Nd:YAG oscillator

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