Spectroscopic properties and diode pumped 1.6 μm laser performance in Yb-codoped Er: Y3Al5O12 and Er: Y2SiO5

Spectroscopic studies of the 1.5μm (4I15/2→4I13/2) emission from polycrystalline ceramic Er:YAG and Er:KPb2Cl5

“…The emission quantum efficiency of the 1.5 m emission was determined to be only ∼26.4% for highly doped Er:YAG ceramics, which was attributed to upconversion and cross-relaxation processes [16]. For quasi-three level laser operation of the 4 I 13/2 ↔ 4 I 15/2 transition it is important to keep the Er 3+ concentration low (1 at.% or less) in order to minimize re-absorption losses at the laser wavelength and to reduce upconversion losses that depopulate the pump and upper laser levels [1][2][3][4][5][6][7][8][9][10].…”

“…The development of solid-state gain media for the ∼1.5-1.6 m region continues to be of significant current interest for applications in optical communications and eye-safe laser applications [1][2][3]. Significant advances were recently reported in the development of ∼1.6 m Er 3+ lasers (e.g.…”

Performance analysis of thermally bonded Er3+, Yb3+:glass/Co2+:MgAl2O4 microchip lasers

“…That is why in the last two decades many papers were published demonstrating operation of such lasers (Laporta et al 1991;Sourian et al 1994;Mlynczak et al 2011;Li et al 1994;Schweizer et al 1995;Denker et al 2002;Mlynczak et al 2012;Sulc et al 2009, Chen et al 2012, 2014aBurov and Krylova 2012;Kisel et al 2012). The most effective type of the active media used in the microchip lasers operating at 1.5 lm is glass doped with Er 3?…”

In-band pumped room-temperature Er:KY(WO4)2 laser emitting around 1.6 μm

“…Continuous-wave (CW) room-temperature laser operation was demonstrated for several Er-, Yb-codoped crystals: garnets [1], vanadates [2], oxoborates [3][4][5][6] and tungstates [7,8]. Here the ytterbium absorption band at 0.9-1.0 µm was used for pumping and energy transfer to Er ions was utilized.…”