High-gain, reflection-double pass, Ti:sapphire continuous-wave amplifier delivering 5.77 W average power, 82 MHz repetition rate, femtosecond pulses

2000 ◽  
Vol 76 (22) ◽  
pp. 3182-3184 ◽  
Author(s):  
Zhenlin Liu ◽  
Hidetoshi Murakami ◽  
Toshimasa Kozeki ◽  
Hideyuki Ohtake ◽  
Nobuhiko Sarukura
Keyword(s):  
Repetition Rate ◽  
Continuous Wave ◽  
Average Power ◽  
High Gain ◽  
Femtosecond Pulses ◽  
Double Pass

Reflection-double-pass, Ti:sapphire continuous-wave amplifier delivering 5.77-W average power, 82-MHz repetition rate, 100-fs pulses

2000 ◽  
Author(s):  
Zhenlin LIU ◽  
Hidetoshi MURAKAMI ◽  
Toshimasa KOZEKI ◽  
Hideyuki OHTAKE ◽  
Nobuhiko SARUKURA
Keyword(s):  
Repetition Rate ◽  
Continuous Wave ◽  
Average Power ◽  
Double Pass

scholarly journals An Eye-Safe, SBS-Free Coherent Fiber Laser LIDAR Transmitter with Millijoule Energy and High Average Power

Photonics ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 15
Author(s):  
Mehmetcan Akbulut ◽  
Leonid Kotov ◽  
Kort Wiersma ◽  
Jie Zong ◽  
Maohe Li ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Repetition Rate ◽  
Peak Power ◽  
Figure Of Merit ◽  
Current System ◽  
Glass Fibers ◽  
Average Power ◽  
High Gain ◽  
Short Length ◽  
High Average Power

We report on an eye-safe, transform-limited, millijoule energy, and high average power fiber laser. The high gain and short length of the NP phosphate-glass fibers enable the SBS-free operation with kW level peak power. The output energy is up to 1.3 mJ, and the average power is up to 23 W at an 18 kHz repetition rate with 600 ns pulses (peak power > 2.1 kW). The PER is ≈16 dB and the M2 of the beam is 1.33 × 1.18. The coherent LIDAR Figure Of Merit (FOM) is 174 mJ*sqrt(Hz), which to our knowledge is the highest reported for a fiber laser. We also report 0.75 mJ energy and >3.7 kW peak power with down to 200 ns pulses and up to 1.21 mJ energy with a 3–5 kHz repetition rate operation of the current system.

Generation of femtosecond pulses based on efficient frequency doubling of erbium fiber oscillator-amplifier laser

2014 ◽  
Vol 23 (02) ◽  
pp. 1450016 ◽  
Author(s):  
Guanyu Liu ◽  
Zhiqiang Lv ◽  
Zibo Gong ◽  
Kebin Shi
Keyword(s):  
Conversion Efficiency ◽  
Repetition Rate ◽  
Nonlinear Crystal ◽  
Average Power ◽  
Frequency Doubling ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Femtosecond Pulses ◽  
Rate Frequency

We report on frequency doubling of 1.55-μm fiber oscillator-amplifier laser with conversion efficiency of 27% by using off-the-shelf nonlinear crystal. The system generates 135-femto-second (fs) pulses with average power of 110 mW at 80 MHz repetition rate. Frequency doubling efficiency as a function of pulse pre-chirp in front of a single mode erbium fiber amplifier was investigated.

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.

Double-pass Pre-chirp managed amplification with high gain and high average power

2021 ◽  
Author(s):  
Yao Zhang ◽  
Jingshang Wang ◽  
Hao Teng ◽  
SHAOBO FANG ◽  
Junli Wang ◽  
...  
Keyword(s):  
Average Power ◽  
High Gain ◽  
High Average Power ◽  
Double Pass
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