Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper ca_p_46

Tm-doping concentration influence on Tm:GGAG lasing and tenability at 2 μm spectral region

Not Accessible

Your library or personal account may give you access

Abstract

Thulium doped solid state lasers are well-known sources of radiation tunable around 2 μm. Obtainable wavelengths cover important spectral regions such as absorption lines of water, characteristic spectra of some gases or the atmospheric transmission bands. Tunable Tm3+ lasing was accomplished using various matrices, such as YAG, YAP or YLF [1]. Recently an interest re-emerged in the mixed garnets as host materials. Their multi-site structure induces broadening of spectra of the active ions, improving overlap with pumping diode emission and extending emission spectra and tunability [2]. In this submission, Tm3+ doped mixed gadolinium-gallium-aluminium-garnet Gd3(Ga5−xAlx)O12 (GGAG) is investigated. Focus is given to the Tm3+ concentration dependence of lasing and tunability parameters as a follow-up work to the first Tm:GGAG lasing report with one Tm3+ concentration sample [3]. The Tm:GGAG crystal was grown using Czochralski method in a slightly oxidative atmosphere. Five planeparallel face-polished Tm:GGAG samples with concentrations varying from 1.4 at.% to 8.4 at.% (Tm/Gd) and thicknesses ranging from 2.7 mm to 3.6 mm were cut from the crystal. The samples were longitudinally pumped by fiber coupled (core diam. 400 μm, NA = 0.22) laser diode at wavelength 785 nm in QCW regime (pulse length 5 ms, repetition rate 10 Hz). The 145 mm resonator consisted of a flat pumping mirror (HR @ 1.85–2.11 μm, HT @ 0.78 μm) and concave output coupler (r = 150 mm, R = 97.5 % @1.8 – 2.10 μm). For the wavelength tuning, 1.5 mm thick birefringent SiO2 plate was inserted in the cavity at the Brewster’s angle.

© 2019 IEEE

PDF Article
More Like This
Spectroscopic and Lasing Properties of Er:GGAG Crystal in Temperature Range 80 to 340 K

Michal Němec, Pavel Boháček, Richard Švejkar, Jan Šulc, Helena Jelínková, Bohumil Trunda, Lubomír Havlák, Martin Nikl, and Karel Jurek
JTu3A.33 Advanced Solid State Lasers (ASSL) 2019

2.94 µm and 2.1 µm tunable laser based on Yb,Ho-doped GGAG crystal

Richard Švejkar, Jan Šulc, Pavel Boháček, Helena Jelínková, Bohumil Trunda, Lubomír Hávlak, Martin Nikl, and Karel Jurek
JM5A.7 Advanced Solid State Lasers (ASSL) 2019

Tm, Ho:GGAG Disordered Garnet Crystal for Tunable 2.1 µm Cryogenically Cooled Laser

Jan Kratochvíl, Pavel Boháček, Jan Šulc, Michal Němec, Martin Fibrich, Helena Jelínková, Bohumil Trunda, Lubomír Havlák, Karel Jurek, and Martin Nikl
MTu3C.4 Mid-Infrared Coherent Sources (MICS) 2020

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved