Deep-red planar waveguide laser operation of Eu 3+ :KY(WO 4 ) 2 layers
Year: 2024
Type: article
Abstract: We report on the first deep-red europium planar waveguide laser. It employs 30-µm thick heavily-doped 11.5 at.% Eu:KY(WO 4 ) 2 layers grown by liquid phase epitaxy on undoped substrates using K 2 W 2 O 7 as a solvent. When pumped with a green laser at 532 nm, the Eu-waveguide laser delivers a maximum output power of 7 mW at 704.7 nm with a slope efficiency of 9.5%, a laser threshold of 21 mW, and linear polarization. The waveguide propagation losses are as low as 0.05 dB/cm. The morphology, vibronic, and spectroscopic properties of the epitaxial layers are also studied. In the deep red, for the 5 D 0 → 7 F 4 transition, the stimulated-emission cross-section reaches 1.76 × 10 −20 cm 2 at 704.7 nm for light polarization E || N p , and the luminescence lifetime of the 5 D 0 manifold is 472 µs.
Source: Optics Express
DOI: 10.1364/oe.537598
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: G1096158024, G2189472788, G2262748287, G3480869486, G4010549198, G425668148, Development of innovative visible lasers, G6152864631, G683931746, G7084143925, G7663607926, WelcomINg and TraiNING of international high-level post-docs in Normandy, Novel crystalline materials for multi-color visible laser sources
OpenAlex ID: W4404229697