Slab Yb:YAG pulse amplifier with high amplification gain and signal-to-noise ratio

doi:10.1007/s12200-017-0564-4

Front. Optoelectron.

2017, Vol. 10

Issue (1) : 51-56 https://doi.org/10.1007/s12200-017-0564-4

RESEARCH ARTICLE

Slab Yb:YAG pulse amplifier with high amplification gain and signal-to-noise ratio

Jun LIU¹, Jianguo XIN¹(

), Ye LANG¹, Jiabin CHEN²

¹. School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China
². School of Automation, Beijing Institute of Technology, Beijing 100081, China

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Abstract

This study experimentally investigated a Yb:YAG pulse laser amplifier with a high amplification gain and a high signal-to-noise ratio (SNR). The highest amplification gain of 172 and highest pulse energy of 131 mJ were obtained with the highest SNR of 24.9 dB from a volume gain of 10 mm × 10 mm × 1 mm. The output beam quality values of $M x 2 = 1.91$ in the slow axis and $M y 2 = 1.58$ in the fast axis were also achieved.

Keywords laser amplifiers ytterbium lasers diode-pumped lasers signal-to-noise ratio (SNR)

Corresponding Author(s): Jianguo XIN

Online First Date: 29 December 2016 Issue Date: 17 March 2017

Cite this article:

Jun LIU,Jianguo XIN,Ye LANG, et al. Slab Yb:YAG pulse amplifier with high amplification gain and signal-to-noise ratio[J]. Front. Optoelectron., 2017, 10(1): 51-56.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-017-0564-4
https://academic.hep.com.cn/foe/EN/Y2017/V10/I1/51

Fig.1 Experiment setup of the LD end-pumped Yb:YAG pulse laser amplifier

Fig.2 Energy storage efficiency and stored energy versus the ratio of the pumping pulse duration to the lifetime of the upper laser level

Fig.3 ASE noise pulse energy versus the ratio of the pumping pulse duration to the lifetime of the upper energy level for different pumping peak power intensity

Fig.4 Output and ASE noise pulse energies versus the ratio of the pumping pulse duration to the lifetime of the upper laser level

Fig.5 Amplification gain (a) and the ratio of the amplified pulse energy to the ASE noise energy (b) versus the ratio of the pumping pulse duration to the life time of the upper laser level

Fig.6 (a) Far-field intensity distributions of the laser amplifier output; (b) beam transverse profile; (c) intensity distribution in slow axis: experimental data (*) and Gaussian fitting (red curve); (d) intensity distribution in fast axis: experimental data (*) and Gaussian fitting (red curve)

Fig.7 (a) Output pulse width versus input pulse width; (b) pulse waveform of the input pulse and the output pulses. τ_FWHM denotes the full width at half maximum

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