Laser emission from diode-pumped Nd:YAG cladding waveguides obtained by direct writing with a femtosecond-laser beam

2014 ◽  
Author(s):  
Gabriela Salamu ◽  
Flavius Voicu ◽  
Florin Jipa ◽  
Marian Zamfirescu ◽  
Traian Dascalu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Beam ◽  
Laser Emission ◽  
Direct Writing ◽  
Femtosecond Laser Beam ◽  
Diode Pumped

scholarly journals Passive Q-Switching by Cr4+:YAG Saturable Absorber of Buried Depressed-Cladding Waveguides Obtained in Nd-Doped Media by Femtosecond Laser Beam Writing

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1689 ◽  
Author(s):  
Gabriela (Salamu) ◽  
Nicolaie Pavel
Keyword(s):  
Femtosecond Laser ◽  
Laser Beam ◽  
Repetition Rate ◽  
Peak Power ◽  
Continuous Wave ◽  
Average Power ◽  
Laser Pulses ◽  
Direct Writing ◽  
Optical Efficiency ◽  
Femtosecond Laser Beam

We report on laser performances obtained in Q-switch mode operation from buried depressed-cladding waveguides of circular shape (100 μm diameter) that were inscribed in Nd:YAG and Nd:YVO4 media by direct writing with a femtosecond laser beam. The Q-switch operation was realized with a Cr4+:YAG saturable absorber, aiming to obtain laser pulses of moderate (few μJ) energy at high (tens to hundreds kHz) repetition rate. An average power of 0.52 W at 1.06 μm consisting of a train of pulses of 7.79 μJ energy at 67 kHz repetition rate, was obtained from a waveguide realized in a 4.8 mm long, 1.1-at % Nd:YAG ceramics; the pulse peak power reached 1.95 kW. A similar waveguide that was inscribed in a 3.4 mm long, 1.0-at % Nd:YVO4 crystal yielded laser pulses with 9.4 μJ energy at 83 kHz repetition rate (at 0.77 W average power) and 1.36 kW peak power. The laser performances obtained in continuous-wave operation were discussed for each waveguide used in the experiments. Thus, a continuous-wave output power of 1.45 W was obtained from the circular buried depressed-cladding waveguide inscribed in the 1.1-at %, 4.8 mm long Nd:YAG; the overall optical-to-optical efficiency, with respect to the absorbed pump power, was 0.21. The waveguide inscribed in the 1.0-at %, 3.4 mm long Nd:YVO4 crystal yielded 1.85 W power at 0.26 overall optical efficiency. This work shows the possibility to build compact laser systems with average-to-high peak power pulses based on waveguides realized by a femtosecond (fs) laser beam direct writing technique and that are pumped by a fiber-coupled diode laser.

Self-organized microvoid array perpendicular to the femtosecond laser beam in CaF2crystals

2008 ◽  
Vol 5 (5) ◽  
pp. 394-397 ◽  
Author(s):  
X Hu ◽  
B Qian ◽  
P Zhang ◽  
X Wang ◽  
L Su ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Beam ◽  
Self Organized ◽  
Femtosecond Laser Beam

Observation of two-times self-focusing of femtosecond laser beam in ZnO crystal by two-photon luminescence

2018 ◽  
Vol 63 (21) ◽  
pp. 1392-1396 ◽  
Author(s):  
Xiaorui Wang ◽  
Honggang Ye ◽  
Zhicheng Su ◽  
Dapeng Yu ◽  
Shijie Xu
Keyword(s):  
Femtosecond Laser ◽  
Laser Beam ◽  
Two Photon ◽  
Self Focusing ◽  
Femtosecond Laser Beam ◽  
Zno Crystal

Propagation of a filamentary femtosecond laser beam with high intensities at an air-solid interface

2017 ◽  
Vol 15 (2) ◽  
pp. 021401-21404
Author(s):  
Zuoye Liu Zuoye Liu ◽  
Yanghua Zhang Yanghua Zhang ◽  
Jingjie Ding Jingjie Ding ◽  
Shaohua Sun Shaohua Sun ◽  
and Bitao Hu and Bitao Hu
Keyword(s):  
Femtosecond Laser ◽  
Laser Beam ◽  
Solid Interface ◽  
Femtosecond Laser Beam
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