Continuous-wave diode-pumped Yb:glass laser with near 90% slope efficiency

Abstract

Room temperature highly efficient laser action from an ytterbium-doped phosphate glass is demonstrated when end pumped by a 975nm fiber-coupled laser diode. Laser slope efficiencies as high as 88% have been obtained, leading to pump-to-laser conversion efficiencies greater than 50%. From the analysis of pumping threshold and laser slope efficiencies the authors have determined both the optical losses and emission cross section at laser wavelength (1028nm).

Room temperature diode-pumped Yb:CaYAlO4 laser with near quantum limit slope efficiency

“…This is close to the quantum-limited slope efficiency of 93.2% of the laser considering that the peak absorption wavelength occurs at 979 nm and the lasing wavelength Wavelength, nm Figure 4 (online color at www.lphys.org) The wavelength tuning curve of the laser measured when an output coupler of 5% transmission was used and the absorbed pump power was fixed at 3.25 W occurs at 1050 nm. The slope efficiency obtained is comparable to that of the cryogenically cooled Yb:YAG laser [7] and the room-temperature operation Yb:glass [9] laser mentioned above. They were reported to have slope efficiencies values of 90 and 88%, respectively.…”

Spectral properties of Yb3+ ions in Lu3ScAl4O12 single crystal

“…In recent years, ytterbium doped laser crystals have attracted considerable attention [1][2][3][4][5][6]. Trivalent ytterbium has important advantages in comparison with the widely used Nd laser in 1 m laser applications.…”

Spectroscopic investigation of Er3+ in fluorotellurite glasses for 2.7 μm luminescence

“…In order to obtain advantageous 2.7 µm light emission appropriate glass hosts are required. Glass continues to attract a high level of research interest due to its ease of fabrication and ability to be used as diode-pumped high-power solid state laser hosts and optical amplifiers [4,5]. As traditional and well-known mid-infrared glass materials, fluoride glasses possess a low phonon energy (≤550 cm -1 ) and a broad optical transmittance in the range of 0.3-7 µm.…”