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High energy closed-loop cycle narrow linewidth optically pumped XeF(C-A) blue laser at a repetition rate of 10 Hz

Yanlong Shen, Feng Zhu, Li Yu, Kunpeng Luan, Mengmeng Tao, Chao Huang, Hongwei Chen, Lianying Ma, Liu Zhao, Xiaoxia An, Aiping Yi, and Gaopeng Li

Open Access Open Access

Abstract

We report for the first time on a closed-loop cycle narrow linewidth XeF(C-A) blue laser at a repetition rate of up to 10 Hz with each pulse energy of >1 J. A FWHM linewidth of less than 1.5 nm (minimum to 1.1 nm) with a highly stable wavelength centered at 488.3 nm was achieved by employing a polarization-independent custom-designed narrowband optical filter (NBOF) into the cavity. The pulse energy, as well as the repetition rate, to the best of our knowledge, is the highest ever reported in the narrow linewidth XeF(C-A) blue lasers at repetitively-pulsed mode.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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Figures (11)
Fig. 1
Fig. 1 (a) Schematic diagram and (b) photo of the closed-loop cycle repetitively-pulsed narrow linewidth XeF(C-A) blue laser system.

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Fig. 2
Fig. 2 Schematic layout of experimental setup of the narrow linewidth XeF(C-A) blue laser.

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Fig. 3
Fig. 3 Typical spectrum of the XeF(C-A) laser in free-running.

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Fig. 4
Fig. 4 The spectrum of the XeF(C-A) laser with narrow linewidth output.

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Fig. 5
Fig. 5 The laser output characteristics of (a) laser pulse energy and (b) central wavelength and linewidth as a function of the angle α.

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Fig. 6
Fig. 6 Comparison of output energy of the XeF(C-A) lasers at 10 Hz between the open-cycle and the closed-loop cycle.

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Fig. 7
Fig. 7 The laser output characteristics of (a) pulse energy and (b) spectra for ten shots at a repetition rate of 10 Hz. Inset: the pulse train monitored with an oscilloscope.

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Fig. 8
Fig. 8 The trend of linewidth and pulse width of the laser output.

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Fig. 9
Fig. 9 The XeF2 concentration evolution in the chamber during one run.

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Fig. 10
Fig. 10 The concentration distribution of the gasoloid generated by surface discharge on the Teflon substrate.

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Fig. 11
Fig. 11 The output energy of the narrow linewidth blue laser in a relatively long operation period.

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Equations (1)

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e 2GL × R 1 R 2 × T 2 ≥1
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