Highly efficient 355 nm UV generation with non-collinear phase-matching by a prism-coupled device based on CsLiB₆O₁₀

Abstract

We report 355 nm third-harmonic generation (THG) of UV light using CsLiB 6 O 10 (CLBO). To compensate for the walk-off angle in THG by Type II CLBO, we designed a prism-coupled device that takes advantage of non-collinear phase-matching. This new device, equipped with a Nd:YVO 4 laser source, achieved THG with 1.86 W at 47.6% conversion efficiency from the second-harmonic input. This result marks a 1.43-fold improvement over a conventional CLBO crystal, thus validating the effectiveness of the design for walk-off compensation in Type II THG. This is also the first time THG has been achieved using CLBO.

Demonstration of an ultraviolet stimulated Brillouin scattering pulse compressed hundred picosecond laser in LiB3O5crystals

“…After years of active development, different types of nonlinear optical crystals have been studied in generating UV lasers, including KD 2 PO 4 (KDP), β-Ba 2 B 2 O 4 (BBO), LiB 3 O 5 (LBO), Na 3 La 9 O 3 (BO 3 ) 8 (NLBO), Ca 5 (BO 3 ) 3 F (CBF), CsB 3 O 5 (CBO), CsLiB 6 O 10 (CLBO), BaAlBO 3 F 2 (BABF) etc [23,[34][35][36][37][38][39]. Among these crystals, LBO is regarded as one of the most promising solutions for sum-frequencymixing (SFM) in high peak power UV lasers due to its high damage threshold (>25 GW cm −2 ).…”

Tunable terahertz waves from 4-dimethylamino-N′-methyl-4′-stibazolium tosylate pumped with dual-wavelength injection-seeded optical parametric generation

“…Non-collinear phase-matching is effective for increasing the degree of overlap between these beams by compensating the walk-off effect. 21) As shown in Fig. 1(a), the design of non-collinear phase-matching in our is-OPG is depicted for parallel Poynting vectors of the pump and idler beams.…”