Open AccessSpectra and diode-pumped continuous-wave 155 µm laser of Er:Yb:Ca3NbGa3Si2O14 crystal
Author(s) -
Yujin Chen,
Guoliang Gong,
Jianhua Huang,
Yanfu Lin,
Xinghong Gong,
Zhixun Luo,
Yidong Huang
Publication year - 2019
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.27.035418
Subject(s) - materials science , lasing threshold , crystal (programming language) , laser , slope efficiency , optics , diode , optoelectronics , emission spectrum , spectral line , continuous wave , laser diode , absorption spectroscopy , fiber laser , wavelength , physics , astronomy , computer science , programming language
The polarized spectra associated with 1.55 µm lasing in an Er:Yb:Ca 3 NbGa 3 Si 2 O 14 crystal were investigated at room temperature. The crystal had a large absorption cross section of 3.60 × 10 -20 cm 2 at 978 nm, long fluorescence lifetime of 5.81 ms for the 4 I 13/2 multiplet of Er 3+ , and broad emission band at 1.55 µm with full width at half-maximum of 60 nm. End-pumped by a 975 nm diode laser, a 1555 nm continuous-wave microlaser with a maximum output power of 0.4 W and a slope efficiency of 10.6% was demonstrated in a c-cut, 2.5-mm-thick crystal. Combining with natures of the long fluorescence lifetime and the broad emission band, the Er:Yb:Ca 3 NbGa 3 Si 2 O 14 crystal with a good thermal performance may be a promising gain medium for high-energy pulse and broadly tunable lasers around 1.55 µm.