Chen Y, Gong G, Huang J, Lin Y, Gong X, Luo Z, Huang Y. Spectra and diode-pumped continuous-wave 1.55 µm laser of Er:Yb:Ca
3NbGa
3Si
2O
14 crystal.
OPTICS EXPRESS 2019;
27:35418-35425. [PMID:
31878712 DOI:
10.1364/oe.27.035418]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
The polarized spectra associated with 1.55 µm lasing in an Er:Yb:Ca3NbGa3Si2O14 crystal were investigated at room temperature. The crystal had a large absorption cross section of 3.60 × 10-20 cm2 at 978 nm, long fluorescence lifetime of 5.81 ms for the 4I13/2 multiplet of Er3+, 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:Ca3NbGa3Si2O14 crystal with a good thermal performance may be a promising gain medium for high-energy pulse and broadly tunable lasers around 1.55 µm.
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