Efficient continuous wave and quasi-continuous wave operation of a 28 μm Er:Lu_2O_3 ceramic laser | Zendy

Hiyori Uehara | Zendy; Ryo Yasuhara | Zendy; Shigeki Tokita | Zendy; Junji Kawanaka | Zendy; Masanao Murakami | Zendy; Seiji Shimizu | Zendy

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Efficient continuous wave and quasi-continuous wave operation of a 28 μm Er:Lu_2O_3 ceramic laser

Author(s) -

Hiyori Uehara,

Ryo Yasuhara,

Shigeki Tokita,

Junji Kawanaka,

Masanao Murakami,

Seiji Shimizu

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.018677

Subject(s) - continuous wave , ceramic , slope efficiency , laser , lasing threshold , materials science , optics , wavelength , spectroscopy , optoelectronics , fiber laser , physics , quantum mechanics , composite material

We have demonstrated a highly efficient 2.8 μm Er-doped Lu 2 O 3 ceramic laser and investigated the lasing dynamics by time-resolved spectroscopy. During room-temperature continuous wave operation, a slope efficiency of 22% was achieved with a high-quality transparent ceramic. To our knowledge, this is the highest slope efficiency obtained by an Er:Lu 2 O 3 ceramic laser. In addition, an output peak power of 1.2 W was obtained during quasi-continuous wave operation. Time-resolved spectroscopy showed that the emission wavelengths exhibited a red shift from 2715 to 2845 nm, which indicated that continuous wave operation may be possible at 2740 and 2845 nm.

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