High-power yellow solid-state laser at 574 nm and dual-wavelength operation at 1148 and 1163 nm by selecting Raman line of KGW
Year: 2026
Type: article
Abstract: We experimentally demonstrate a highly efficient, diode-pumped solid-state Nd:YVO 4 /KGW intracavity Raman laser featuring selectable single/dual-wavelength Stokes operation and pioneering yellow-light generation. By employing a concave output coupler with a tailored high-reflection band, pure single-wavelength Stokes emission at 1148 nm was isolated with a maximum output power of 6.1 W at 30 W of pump power. Transitioning to an alternative configuration enabled a stable dual-wavelength regime at 1148 and 1163 nm, yielding simultaneous output powers of 1.8 and 3.7 W, respectively. Experimental observations revealed a dynamic preference for an 805 cm -1 cascaded Raman mode over a single 768 cm -1 shift during spectral competition. The conjectured mechanism is that competitive gain dynamics and subsequent pump depletion by the 1148-nm wave play a dominant role. Furthermore, by incorporating an intracavity LBO crystal and a double-sided dichroic mirror to suppress fundamental and Stokes leakage, we achieved the first use of the 689 cm −1 Raman line to generate a yellow laser at 574 nm. The system delivered a maximum yellow output power of 5.2 W with an optical-to-optical conversion efficiency exceeding 17%. These results present a robust framework for developing multi-wavelength laser sources and offer highly viable coherent solutions for biomedical imaging, precision metrology, and high-resolution spectroscopy.
Source: Optics Express
DOI: 10.1364/oe.609333
Institution: National Yang Ming Chiao Tung University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W7221026815