Thermal lensing in a Barium nitrate Raman laser

Pask, Helen M.; Blows, Justin L.; Piper, J. A.; Revermann, Markus; Omatsu, Takashige

doi:10.1364/assl.2001.tub15

Cited by 3 publications

(1 citation statement)

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“…For the KGW2 crystal (corresponding to E||N g ) with Raman shift of 768 cm −1 , the calculated wavelengths of the first, second, and third-order Stokes laser are 1158.9, 1272.1, and 1409.9 nm. By our calculation, the Kerr lens and thermal lens effects of these Raman crystals are negligible at a pumping energy of 120 mJ [33,34]. According to a cascaded SRS model, the threshold of SRS for Stokes laser oscillating is determined by pumping depletion, reflectivity of cavity mirrors, Raman gain coefficient, and the length of the Raman medium [35,36].…”

Section: Stokes Lasers Generationmentioning

confidence: 87%

Discretely Tunable Multiwavelength Visible Laser Based on Cascaded Frequency Conversion Processes

Chen

Peng

et al. 2020

Applied Sciences

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We demonstrate a discretely tunable multiwavelength visible laser through second harmonic generation (SHG) and sum frequency generation (SFG) of multiorder Stokes lasers generated from an external Raman laser oscillator. The Raman laser oscillator, driven by a 1064 nm laser with an energy of 120 mJ, is based on a cascade of Ba(NO3)2 and two axial orthogonal KGd(WO4)2 crystals. Through adjusting the angle of the SHG/SFG crystal, we obtain 16 visible wavelengths with a wide range from 579.5–658.4 nm. In addition, we investigate the output energy and conversion efficiency of the resulting laser with various phase-matching angles. We show that the maximum energy of the visible laser is 8.87 mJ with five wavelengths, and the corresponding total conversion efficiency is 7.4%. These experimental results demonstrate a practical and effective method of generating a discretely tunable multiwavelength visible laser.

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