Efficient conversion of Nd:YAG laser radiationto the eye-safe spectral region by stimulated Raman scatteringin BaWO<sub>4</sub>crystal

Basiev, Tasoltan T.; Basieva, M N; Gavrilov, Andrey V.; Ershkov, M. N.; Ivleva, L. I.; Осико, В. В.; Smetanin, S. N.; Федин, А. В.

doi:10.1070/qe2010v040n08abeh014376

Cited by 25 publications

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“…Using the external cavity for the Raman medium allows to decrease the threshold of SRS generation but the threshold condition become dependent on τ p even for quasi-steady-state SRS [23] because, in the optical cavity with a round-trip time τ c , the SRS oscillation takes place as long as the τ p -long pump pulse acts. If the SRS conversion is weak and depletion of pumping can be neglected, development of the extracavity Raman lasing at single-pass pumping can be defined by the expression [87]…”

Section: Theoretical Approachmentioning

confidence: 99%

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Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps

et al. 2019

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Comparative investigation of characteristics of spontaneous and stimulated Raman scattering (SRS) in different alkali-earth tungstate and molybdate crystals at both high and low frequency anionic group vibrations is presented. It has been found that, among these crystals, the SrMoO4 and SrWO4 crystals are the most perspective for SRS generation on both stretching and bending modes of internal anionic group vibrations with the strongest SRS pulse shortening under synchronous laser pumping because of not only highly intense stretching mode Raman line for efficient primary extra cavity long-shifted SRS conversion but also the widest bending mode Raman line for the strongest SRS pulse shortening down to the inverse width of the widest Raman line (~1 ps) at secondary intracavity short-shifted SRS conversion. The strongest 26-fold pump pulse shortening down to 1.4 ps at the Stokes component with the combined Raman shift in the synchronously pumped extra cavity SrMoO4 and SrWO4 Raman lasers has been demonstrated. It was found that synchronously pumped cascade SRS with combined Raman shift is more efficient in the SrWO4 crystal because the bending mode Raman line is more intense relative to the stretching mode Raman line than that in SrMoO4.

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Section: Theoretical Approachmentioning

confidence: 99%

“…For example, for quasi-steady-state SRS (τ p τ R ), using expression (3) we can express the threshold pump intensity [23]…”

Section: Theoretical Approachmentioning

confidence: 99%

Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps

et al. 2019

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“…Table 2 shows a comparison of our results with the results obtained under other experimental conditions. Note, that optical damages of the BWO crystal surface were reported in several papers [11,[17][18][19][20], but in a number of them, for example in [20], their values were not presented. To complete the data, we also measured the optical damage thresholds of BWO crystals at 1030 nm under the pulse-periodic laser mode (1 KHz pulse repetition rate), under the same conditions as in [11].…”

Section: Resultsmentioning

confidence: 99%

Ablation of BaWO4 Crystal by Ultrashort Laser Pulses

et al. 2020

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Ablation of BaWO4 Raman crystals with different impurity concentrations by ultrashort laser pulses was experimentally studied. Laser pulses with duration varying from 0.3 ps to 1.6 ps at wavelengths of 515 nm and 1030 nm were applied. A single-pulse optical damage threshold of the crystal surface changed from 1.3 J/cm2 to 4.2 J/cm2 depending on the laser pulse parameters and BaWO4 crystal purity. The optical damage threshold under multi-pulse irradiation was an order of magnitude less.

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“…For efficient Raman conversion, the fundamental radiation intensity inside the Raman cavity must exceed certain threshold level. When the Raman medium is placed in a Raman cavity, the SRS threshold condition can be expressed as [26] th…”

Section: Resultsmentioning

confidence: 99%

Diode-pumped actively Q-switched Tm:YAP/BaWO_4 intracavity Raman laser

et al. 2015

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We report an intracavity Raman laser based on BaWO(4) Raman conversion in a diode-pumped actively Q-switched Tm:YAP laser for the first time. With an incident diode power of 17.5 W and a pulse repetition rate of 1 kHz, the maximum average output powers of 880 mW and 306 mW for the fundamental laser at 1.94 μm and the first Stokes laser at 2.36 μm were obtained, respectively. The pulse width and pulse energy of the first Stokes laser were 14.1 ns and 0.31 mJ, respectively. The Raman gain coefficient of the BaWO(4) crystal was estimated to be 1.1 cm/GW at 1.94 μm.

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Efficient conversion of Nd:YAG laser radiationto the eye-safe spectral region by stimulated Raman scatteringin BaWO₄crystal

Cited by 25 publications

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Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps

Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps

Ablation of BaWO4 Crystal by Ultrashort Laser Pulses

Diode-pumped actively Q-switched Tm:YAP/BaWO_4 intracavity Raman laser

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Efficient conversion of Nd:YAG laser radiationto the eye-safe spectral region by stimulated Raman scatteringin BaWO4crystal

Cited by 25 publications

References 0 publications

Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps

Stimulated Raman Scattering in Alkali-Earth Tungstate and Molybdate Crystals at Both Stretching and Bending Raman Modes under Synchronous Picosecond Pumping with Multiple Pulse Shortening Down to 1 ps

Ablation of BaWO4 Crystal by Ultrashort Laser Pulses

Diode-pumped actively Q-switched Tm:YAP/BaWO_4 intracavity Raman laser

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Efficient conversion of Nd:YAG laser radiationto the eye-safe spectral region by stimulated Raman scatteringin BaWO₄crystal