High-average-power and high-conversion-efficiency continuous wave mode-locked Nd:YVO4 laser with a semiconductor absorber mirror

Abstract We demonstrate stable continuous-wave mode-locking (CWML) pulses around 1645nm by employing the home-made Er:YAG ceramic. By using a fiber laser and semiconductor saturable absorber mirror (SESAM) with modulation depth of 1.2%, we get ML pulses with the output average power up to 815 mW, the pulse width shortened as ~4 ps, and the peak power of 1.8 kW. With the SESAM of modulation depth of 2.4%, the second-order harmonic ML pulses were also obtained. As far as we know, this is the first report of CWML from Er3+-doped ceramics and also the shortest pulse duration in Er3+-doped solid-state oscillators.

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High conversion efficiency continuous wave quasi-phase-matched second harmonic generation in MgO doped stoichiometric lithium tantalate

10.1117/12.575303 ◽

2005 ◽

Cited By ~ 1

Author(s):

Yang Lu ◽

Baigang Zhang ◽

Xin Ding ◽

Peng Wang ◽

Feng Ji ◽

...

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Conversion Efficiency ◽

Continuous Wave ◽

Second Harmonic ◽

Lithium Tantalate ◽

High Conversion ◽

High Conversion Efficiency

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High-conversion-efficiency, diode-pumped continuous-wave Raman laser

Optics Letters ◽

10.1364/ol.26.000426 ◽

2001 ◽

Vol 26 (7) ◽

pp. 426 ◽

Cited By ~ 24

Author(s):

Lei S. Meng ◽

Peter A. Roos ◽

Kevin S. Repasky ◽

John L. Carlsten

Keyword(s):

Conversion Efficiency ◽

Continuous Wave ◽

Raman Laser ◽

High Conversion ◽

High Conversion Efficiency ◽

Diode Pumped

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Design and experimental demonstration of a high conversion efficiency OPCPA pre-amplifier for petawatt laser facility

High Power Laser Science and Engineering ◽

10.1017/hpl.2018.52 ◽

2018 ◽

Vol 6 ◽

Cited By ~ 7

Author(s):

Xiao Liang ◽

Xinglong Xie ◽

Jun Kang ◽

Qingwei Yang ◽

Hui Wei ◽

...

Keyword(s):

Conversion Efficiency ◽

Nonlinear Crystal ◽

Beam Quality ◽

Pump Energy ◽

High Conversion ◽

Signal Pulse ◽

High Conversion Efficiency ◽

Optical Parametric ◽

Good Beam Quality ◽

Laser Facility

We present the design and experiment of a broadband optical parametric chirped-pulse amplifier (OPCPA) which provides high conversion efficiency and good beam quality at 808 nm wavelength. Using a three-dimensional spatial and temporal numerical model, several design considerations necessary to achieve high conversion efficiency, good beam quality and good output stability are discussed. To improve the conversion efficiency and broaden the amplified signal bandwidth simultaneously, the nonlinear crystal length and OPCPA parameters are analyzed and optimized with the concept of dissipating amplified idler between optical parametric amplification (OPA) of two crystals configuration. In the experiment, an amplifier consisting of two OPCPA stages of ‘L’ type configuration was demonstrated by using the optimized parameters. An amplified signal energy of 160 mJ was achieved with a total pump-to-signal efficiency of 35% (43% efficiency for the OPCPA stage 2). The output bandwidth of signal pulse reached 80 nm and the signal pulse was compressed to 24 fs. The energy stability reached 1.67% RMS at 3% pump energy variation. The optimized OPCPA amplifier operates at a repetition rate of 1 Hz and is used as a front-end injection for the main amplifier of SG-II 5PW laser facility.

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