Abstract
Lanthanide-doped fiber lasers are sought after for many applications, as they can generate high-brightness signals through some of the most compact, rugged, and reliable laser systems available. Although high power fiber lasers have been mostly reported between 1 and 3 µm, the recent advent of GaN laser diodes has provided a low-cost solution to efficiently pump lanthanide-doped fibers for visible laser emission. To date, watt-level operation of these lasers has been reported [1, 2], but only for active fibers based on fluoride glass, which is known for its constraining thermal and mechanical properties. While the use of such a host is needed for mid-infrared lasers due to its low phonon energy, it is not necessarily the case for visible laser emission. Indeed, for some rare-earth ions like Sm3+ and Dy3+, the large energy gap between the upper energy level responsible for visible emission (in the case of Dy3+, 4F9/2) and the energy level directly below (in the case of Dy3+, 6F5/2) allows a high phonon energy medium such as silica to be a suitable host for laser emission [3]. While visible silica fiber lasers show a lot of promise due to their excellent thermal and mechanical properties, very few demonstrations of such lasers have been made. Thus far, the record output power is set to 18 mW [4]. In this work, we present a monolithic Dy3+-doped aluminosilicate fiber laser yielding a maximum output power of 147 mW, which is eight times more than the previous record.
© 2023 IEEE
PDF ArticleMore Like This
Keisuke Kasai, Akira Fujisaki, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa, and Shin Masuda
SW1N.4 CLEO: Science and Innovations (CLEO:S&I) 2014
Ayaka Koganei, Hiroya Katsuragawa, Kenta Takahashi, Osamu Ishii, Masaaki Yamazaki, and Yasushi Fujimoto
cj_9_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2023
Junha Jung, Kyungtaek Lee, Jeewhan Kim, and Ju Han Lee
JTu5A.5 Advanced Solid State Lasers (ASSL) 2023