Diode-pumped high-efficiency Tm:YAG lasers

Abstract

Eye-safe solid-state lasers that operate at 2 mm wavelength have many applications in medical, remote sensing and military technologies. With a 3-W CW laser-diode pumping, we obtained 760 mW 2.01 mm Tm:YAG laser under CW operation. The slope efficiency was 44% and the optical to optical efficiency reached 36%. In the acousto-optic Q-switched operation, laser pulses with the energy of 1.2mJ and 380 ns FWHM width have been achieved.

Growing Large Size Complex Oxide Single Crystals by Czochralski Technique for Electronic Devices

“…Laser radiation in this region is widely used in military equipment [23], meteorology, and location [24]. The range of its medical applications is particularly wide surgery, ophthalmology, gynecology, orthopedics, arthroscopy, angioplasty, and others [23,24].…”

Characterization of up-conversion processes in Tm3+-doped LiNbO3

“…Recently, ppolarized CW laser oscillation of Tm 3+ ions in Zn-diffused channel waveguides operating at 1.76 mm under 795 nm pumping has been demonstrated [6]. The slope efficiency reported for these waveguide lasers is lower than that reported for other Tm 3+ lasers [7,8]. This fact could be related with non-optimized cavity design or to up-conversion processes that affect thulium luminescence, particularly after 690 nm pumping [9,10].…”

Effect of Tm2O3 doping on microstructure and optical properties of Tm:YAG ceramics

“…The spectra and energy levels of Tm-doped YAG crystal have previously been investigated by Gruber et al [16] and Tiseanu et al [17]. Most Tm:YAG lasers were pumped with peak 785 nm absorption lines of Tm 3þ [18][19][20]. The radiation emission of around 2 mm corresponds to transition from the 3 F 4 level to the 3 H 6 level for Tm.…”