Tunable resonantly pumped Er:GGAG laser

Abstract

The main goal of this work was to present spectroscopic and laser characteristics including the wavelength tunability of Er-doped Gd3Ga3Al2O12 (Er:GGAG) crystal. Seven Er:GGAG crystals of various Er/Gd concentrations were investigated. The maximum output peak power of 0.99 W with an absorbed pumping peak power amplitude of 5.22 W for the crystal at 0.55 at.% Er/Gd concentration was researched. The tuning was accomplished using a SiO2 birefringent plate. The laser wavelength was tunable in three eye-safe spectral bands from 1609 to 1650 nm.

Single longitudinal mode and wavelength tunable Er3+-doped sesquioxide ceramic laser at ~1.6 μm

“…Numerous techniques are used for wavelength tuning [7], such as etalon [8,9], prism [10], volume Bragg grating (VBG) [11], and birefringent filter [12][13][14]. Compared to other methods, etalon-based wavelength tuning was a common approach with the advantages of simple structure, low cost, and avoiding the necessity of polarized beams.…”

“…Compared to other methods, etalon-based wavelength tuning was a common approach with the advantages of simple structure, low cost, and avoiding the necessity of polarized beams. Tunable operation of Er 3+ -doped solid-state lasers have been demonstrated in Er:YAG (1614-1649 nm) [11], Er:YVO4 (1578-1607 nm) [13], and Er:GGAG (1609-1650 nm) [14].…”