Work

Monolithic Er:YAG ceramic waveguide laser fabricated by femtosecond direct laser writing

Year: 2025

Type: article

Abstract: We demonstrated a monolithic waveguide laser in Er:YAG ceramics fabricated using femtosecond direct laser writing. High-quality Er:YAG ceramics with precisely controlled Er-ion doping were synthesized, providing an optimal medium for laser and amplifier applications. Waveguide structures were inscribed within the ceramics to support low-loss propagation with a large mode area. A monolithic laser cavity was formed by applying dielectric multilayer coatings to the waveguide facets. The waveguide laser, pumped at a wavelength of 1532 nm, achieved 82 mW output and 27% slope efficiency at a wavelength of 1645 nm. Single-longitudinal-mode operation was achieved at 11 mW.

Source: Optics Express

DOI: 10.1364/oe.551899

Authors: Taishi Sumiya, Shuntaro Tani, Akihiro Tsunoda, Masato Nakazaki, Yohei Kobayashi

Institutions: The University of Tokyo, JX Advanced Metals Corporation (Japan)

Language: English

Topic: Solid State Laser Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Ministry of Education, Culture, Sports, Science and Technology