Slope Efficiency Measurements of Chromium-Doped Forsterite Laser

1991 ◽  
Author(s):  
V. Petričević ◽  
A. Seas ◽  
R. R. Alfano
Keyword(s):  
Slope Efficiency

scholarly journals Optimized Growth and Laser Application of Yb:LuAG Single-Crystal Fibers by Micro-Pulling-Down Technique

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 78
Author(s):  
Anye Wang ◽  
Jian Zhang ◽  
Shuai Ye ◽  
Xiaofei Ma ◽  
Baiyi Wu ◽  
...  
Keyword(s):  
Single Crystal ◽  
High Power ◽  
Slope Efficiency ◽  
Continuous Wave ◽  
Beam Quality ◽  
Axial Direction ◽  
Optical Quality ◽  
Central Wavelength ◽  
High Power Lasers ◽  
Crystal Fibers

Single-crystal fibers (SCFs) have a great application potential in high-power lasers due to their excellent performance. In this work, high-quality and crack-free Yb3+:Lu3Al5O12 (Yb:LuAG) SCFs were successfully fabricated by the micro-pulling-down (μ-PD) technology. Based on the laser micrometer and the X-ray Laue diffraction results, these Yb:LuAG SCFs have a less than 5% diameter fluctuation and good crystallinity along the axial direction. More importantly, the distribution of Yb ions is proved to be uniform by electron probe microanalysis (EPMA) and the scanning electron microscope (SEM). In the laser experiment, the continuous-wave (CW) output power using a 1 mm diameter Yb:LuAG single-crystal fiber is determined to be 1.96 W, at the central wavelength of 1047 nm, corresponding to a slope efficiency of 13.55%. Meanwhile, by applying a 3 mm diameter Yb:LuAG SCF, we obtain a 4.7 W CW laser output at 1049 nm with the slope efficiency of 22.17%. The beam quality factor M2 is less than 1.1 in both conditions, indicating a good optical quality of the grown fiber. Our results show that the Yb:LuAG SCF is a potential solid-state laser gain medium for 1 μm high-power lasers.

980 nm high power, high slope efficiency distributed feedback lasers with nonabsorbing mirrors

1998 ◽  
Vol 34 (17) ◽  
pp. 1663 ◽  
Author(s):  
R.M. Lammert ◽  
J.E. Ungar ◽  
S.W. Oh ◽  
H. Qi ◽  
J.S. Chen ◽  
...  
Keyword(s):  
High Power ◽  
Slope Efficiency ◽  
Distributed Feedback ◽  
Distributed Feedback Lasers ◽  
High Slope

scholarly journals Heat-fraction-limited CW Yb:YAG cryogenic solid-state laser with 100% photon slope efficiency

2010 ◽  
Vol 18 (16) ◽  
pp. 16573 ◽  
Author(s):  
David C. Brown ◽  
Thomas M. Bruno ◽  
Joseph M. Singley
Keyword(s):  
Solid State ◽  
Slope Efficiency ◽  
Solid State Laser ◽  
State Laser

LD-pumped high-power continuous-wave Pr3+:YLF deep red lasers at 718.5 and 720.8 nm

Laser Physics ◽  
2021 ◽  
Vol 32 (2) ◽  
pp. 025801
Author(s):  
Xiangrui Liu ◽  
Zhuang Li ◽  
Chengkun Shi ◽  
Bo Xiao ◽  
Run Fang ◽  
...  
Keyword(s):  
Output Power ◽  
High Power ◽  
Slope Efficiency ◽  
Laser Emission ◽  
Continuous Wave ◽  
Optical Glass ◽  
Maximum Output Power ◽  
Glass Plate ◽  
Maximum Output ◽  
First Time

Abstract We demonstrated 22 W LD-pumped high-power continuous-wave (CW) deep red laser operations at 718.5 and 720.8 nm based on an a-cut Pr3+:YLF crystal. The output power of both polarized directions reached the watt-level without output power saturation. A single wavelength laser operated at 720.8 nm in the π-polarized direction was achieved, with a high output power of 4.5 W and high slope efficiency of approximately 41.5%. To the best of our knowledge, under LD-pumped conditions, the laser output power and slope efficiency are the highest at 721 nm. By using a compact optical glass plate as an intracavity etalon, we suppressed the π-polarized 720.8 nm laser emission. And σ-polarized single-wavelength laser emission at 718.5 nm was achieved, with a maximum output power of 1.45 W and a slope efficiency of approximately 17.8%. This is the first time that we have achieved the σ-polarized laser emission at 718.5 nm generated by Pr3+:YLF lasers.

Self-imaging waveguide Nd:YAG laser with 58% slope efficiency

2003 ◽  
Author(s):  
J. T McKinnie ◽  
J.E. Koroshetz ◽  
W.S. Pelouch ◽  
D.D. Smith ◽  
J.R. Unternahrer ◽  
...  
Keyword(s):  
Nd:Yag Laser ◽  
Slope Efficiency

Slope efficiency measurements of a chromium-doped forsterite laser

1991 ◽  
Vol 16 (11) ◽  
pp. 811 ◽  
Author(s):  
V. Petričević ◽  
A. Seas ◽  
R. R. Alfano
Keyword(s):  
Slope Efficiency

Absorption efficiency analysis and optical resonator simulation of Ho:YLF laser pumped with Tm:fiber laser

Laser Physics ◽  
2021 ◽  
Vol 32 (1) ◽  
pp. 015001
Author(s):  
Majid Babaiy Tooski ◽  
Abbas Maleki ◽  
Abdolah Eslami Majd ◽  
Hassan Ebadian
Keyword(s):  
Slope Efficiency ◽  
Doping Concentration ◽  
Continuous Wave ◽  
Focal Length ◽  
Beam Width ◽  
Absorption Efficiency ◽  
Optical Resonator ◽  
Threshold Power ◽  
Continuous Wave Operation ◽  
Lens Focal Length

Abstract In this paper, a Tm:fiber laser pumped Ho:YLF laser is simulated. The absorption efficiency, optimum crystal length, and optical resonator are analytically studied and simulated using LASCAD software, and the atomic-level degeneracies are considered in evaluating the absorption efficiency. In this way, the absorption efficiencies of 65% and 87% are obtained for single-pass 30 mm Ho:YLF crystal with doping concentration 0.5% and 1% respectively. These calculated efficiencies are verified by our experimental measurements and they coincide with acceptable errors. To estimate a proper length for the Ho:YLF crystal with specified doping concentration, the up-conversion, and the reabsorption effects are considered. As a result, we find the 30 mm length crystal is suited for reducing the absorption threshold and prohibiting reabsorption while saturation is controlled. The threshold power and slope efficiency for 65 W pumped powers are calculated by LASCAD software, and the thermal lens focal length of −665 mm is obtained. For a nearly constant beam width inside the cavity and suitable beam overlap efficiency, a concave-concave configuration is chosen for the optical resonator. In the continuous-wave operation, the output power is funded to be 38.4 W and the slope efficiency would be 66%.

Diode pumped visible Dy3+-doped silica fiber laser: Ge-co-doping effects on lasing efficiency and photodarkening

2021 ◽  
Author(s):  
Tomoya Okazaki ◽  
Chiaki Otsuka ◽  
Edson Haruhico Sekiya ◽  
Kota Kawai ◽  
Masato Mizusaki ◽  
...  
Keyword(s):  
Slope Efficiency ◽  
Rayleigh Scattering ◽  
Maximum Output Power ◽  
Silica Fiber ◽  
Maximum Output ◽  
Laser Oscillation ◽  
Scattering Loss ◽  
Co Doping ◽  
Doping Effects ◽  
Diode Pumped

Abstract We present the first demonstration of visible laser oscillation in the Dy3+-doped silica fiber pumped by a 451nm InGaN laser diode. It was found that Ge-co-doping plays the following important roles of laser oscillation: (1) to reduce the Rayleigh scattering loss, (2) to suppress the X-ray-induced and pump-induced photodarkening (PD), and (3) to increase lasing slope efficiency. In a fiber with 0.46wt% Dy, 1.8 wt% Ge, and 0.54wt% Al, the slope efficiency is 22.0 % at 582.5 nm, and the maximum output power is 18.4 mW.

Resonantly pumped Tm-doped fiber laser with >90% slope efficiency

2014 ◽  
Vol 39 (3) ◽  
pp. 470 ◽  
Author(s):  
Daniel Creeden ◽  
Benjamin R. Johnson ◽  
Scott D. Setzler ◽  
Evan P. Chicklis
Keyword(s):  
Fiber Laser ◽  
Slope Efficiency
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