cw and pulsed 2.8 μm laser emission from diode-pumped Er3+:LiYF4 at room temperature

Abstract

Laser emission at 2.8 μm from an Er3+:LiYF4 sample longitudinally pumped with a multiple stripe laser diode array is observed for the first time. The threshold for pulsed laser emission is 33 μJ and for cw laser emission 147 mW. cw laser action in this normally self-terminating laser transition is attributed to a cooperative up-conversion process.

Spectroscopic properties and energy transfer process in Er3+ doped ZrF4-based fluoride glass for 2.7μm laser materials

“…Light sources in 2.7 lm region are of particular interest for medical applications especially in skin surgeries and the cutting or removal of hard tissues due to strong water absorption in this spectral region [6] [7][8][9][10][11][12][13][14][15]. In addition, there is a great interest in upconversion and 1.5 lm laser performance of Er 3+ doped crystal and glass fibers [16][17][18].…”

Photoluminescence in Er(TTA)3(Phen) Thin Film

“…Yb 3 is added as a sensitizer for Er 3 lasers. In LiYF 4 lasing action at several infrared wavelengths namely 0.85, 1.5 and 2.7 mm was reported by Chicklis et al [12] and Kintz et al [13]. Emission properties, oscillator strengths and laser parameters of Er 3 in LiYF 4 have been studied by Hubert et al [1].…”

Efficient cryo-cooled 2.7-μm Er3+:Y2O3 ceramic laser with direct diode pumping of the upper laser level

“…The output power is presented here versus absorbed pump power for the optimal outcoupling of 15%. The absorbed pump power was used as a baseline since the actual fraction of pump power absorbed in the sample varied with pump power (averaging ∼ 40% for the 17 mm long 2 at.% Er ] up-conversion process probability is expected to be temperature dependent, and most likely suffer from temperature reduction [1]. Nevertheless, our observations, for which the ∼ 2.7-μm Er 3+ :Y 2 O 3 ceramic laser was tested in a quasi-CW (Q-CW) regime with pump pulse duration varying in the wide 3 -700 ms range, do not support that statement.…”