Short pulse duration of a 355-nm laser by extracavity sum-frequency mixing with a LiB₃O₅ (LBO) crystal

Abstract

A diode-pumped all-solid-state ultraviolet (UV) laser at 355 nm with pulse duration as short as 4.5 ns and peak power of 5.96 kW is proposed. The output UV light at 355 nm is obtained by extracavity sum-frequency mixing and has a power of 536 mW at the incident pump power of 15.65 W, corresponding to an optical-to-optical efficiency of 3.4%, the energy distribution of the UV light is near TEM00 and the power stability in an hour is better than ± 5.2%. Taking into account the thermal effects of the gain medium Nd:YVO4 crystal at high incident pump power, a plane-to-plane cavity is chosen to take advantage of the maximum pump power and obtain the compact configuration.

Diode pumped Pr3+:LiYF4-BBO ultraviolet laser at 320 nm

“…The laser performance of Pr 3+ ions has been reported [ 32 52]. In 2011, Xu et al, reported continu ous wave laser operation of Pr 3+ doped LiLuY 4 , LiYF 4 , and KYF single crystals in the red, orange, and 1 The article is published in the original. green spectral regions by using a new pumping scheme [53].…”

Over 8 W high peak power UV laser with a high power Q-switched Nd:YVO4oscillator and the compact extra-cavity sum-frequency mixing

“…The extra-cavity harmonic generation using NLO conversion is an effective method to achieve high power, high pulse repetition frequency (PRF), and high beam quality UV laser [2,[7][8][9][10][11][12]. In [7] overall energy efficiencies on the order of 80% are predicted for the conversion of 1.0 μm laser radiation to the third harmonic.…”

Short-pulse-width and high-peak-power Q-switched YVO4/Nd:YVO4laser with an acousto-optical modulator

“…LD pumped lasers with the Nd:YVO 4 crystal at 355 nm [2], 914 nm [3], and 1064 nm [14][15][16] are already available in commercial products and research field. However, scaling to higher power with good efficiency is still plagued by thermal aberrations and thermally induced fracture [17].…”