Efficient diode-pumped Yb:Gd2SiO5 laser

Abstract

An efficient diode-pumped laser was demonstrated by using an ytterbium-doped laser crystal, Yb: Gd 2 SiO 5 ͑Yb:GSO͒, wherein Yb 3+ ions exhibit the largest ground-state splitting among all the ytterbium-doped crystals. The Yb:GSO laser can be operated at a low pumping threshold, and the most efficient laser occurs around 1088 nm since the corresponding emission band has the largest emission cross section and the lowest thermal population. A slope efficiency of 75% was demonstrated for a continuous-wave Yb:GSO laser at 1094 nm, and self-pulsed lasers were achieved within the tunable range of 1091-1105 nm, which are the longest laser wavelengths achieved for Yb 3+ lasers.

Diode-pumped passively mode-locked Yb3+-doped yttrium lanthanum oxide ceramic laser

“…Efficient laser operations have already been demonstrated in many ytterbiumdoped materials, such as tungstates Yb:KGW [4], garnet Yb:YAG [5][6][7][8], oxyorthosilicates Yb:GSO, and Yb:LYSO [9][10][11]. Furthermore, ytterbium-doped fibers have been recognized in recent years as very attractive active media for diode-pumped laser oscillators [12][13][14][15][16][17][18][19][20].…”

Continuous-wave green thin-disk laser at 524 nm based on frequency-doubled diode-pumped Yb:GSO crystal

“…This is due mainly to the fact that the simple energy level scheme of Yb 3+ minimizes undesirable effects such as upconversion, excited-state absorption, and concentration quenching. Also, the small quantum defect (5-15%) and high quantum efficiency reduce the thermal load and associated problems [1] Figure 1 (online color at www.lphys.org) Energy level splitting of Yb 3+ in GSO host [49] time. Moreover, we will also examine intracavity secondharmonic generation (SHG) to reach the green light at 524 nm.…”

μ-Raman and infrared reflectance spectroscopy characterization of (Lu1−xGdx)2SiO5 solid solution single crystals doped with Dy3+ or Sm3+

“…In particular, LSO doped with Ce 3+ appears to be the best scintillation material for PET application [4][5][6]. These crystals have many other attractive characteristics, such as high thermal conductivity and excellent physical and chemical properties of laser host materials [13][14][15]. Effective laser action at around 1µm has been reported for LSO doped with ytterbium ions [16].…”