Efficient nanosecond barium nitrate Raman laser for the visible spectral range

  • We report on the design and performance of two solid-state Raman lasers, pumped by a frequency-doubled Nd:YAG laser at 532 nm (8 ns FWHM, 10 Hz, up to 10 mJ), that generate either the first or second Stokes radiation with wavelengths of 563 nm and 598 nm. Barium nitrate crystals with a 1 cm² face area and lengths of 3 cm and 5 cm were used as the Raman-active medium in stable semi-spherical resonators. The Raman lasers produced first Stokes and second Stokes pulses, achieving pulse energies up to 2.3 mJ and conversion efficiencies up to 35% (first Stokes, 5 cm crystal) and 21% (second Stokes, 5 cm crystal). The output beams exhibit nearly Gaussian profiles with beam quality factors of M² = 1.67 and M² = 1.83, respectively. The proposed design and characterization demonstrated a Raman laser with high efficiency and superior beam quality. After subsequent frequency doubling, the output appears well dedicated for future differential absorption LiDAR (DIAL) applications.

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Metadaten
URN:urn:nbn:de:kobv:526-opus4-21320
Publisher DOI:https://doi.org/10.1364/OE.580000
Author:Christoph ZeschORCiD, Daniel Finkelstein, Martin RegehlyORCiDGND, Jürgen ReifGND, Sigurd SchraderORCiD
Parent Title (English):Optics Express
Document Type:Article
Language:English
Year of Publication:2026
Volume:34
Issue:4
First Page:6355
Last Page:6363
Publisher:Optica
Publishing Institution:Technische Hochschule Wildau
Tag:Gaussian beam; Nd:YAG laser; Raman laser; laser source; solid state laser; ultraviolet laser
Source:Christoph Zesch, Daniel Finkelstein, Martin Regehly, Jürgen Reif, and Sigurd Schrader, "Efficient nanosecond barium nitrate Raman laser for the visible spectral range," Opt. Express 34, 6355-6363 (2026)
Faculties an central facilities:Fachbereich Ingenieur- und Naturwissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 535 Licht, Infrarot- und Ultraviolettphänomene
6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 621 Angewandte Physik
Funding:Publikationsfonds der TH Wildau
Licence (English): Optica Open Access Publishing Agreement
Release Date:2026/02/20
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