Optics and Precision Engineering, Volume. 26, Issue 12, 2888(2018)
Spectral compression of XeF(C-A) excimer laser using grating resonator with an intra-cavity etalon
In order to improve the signal-to-noise ratio for laser applications underwater, a grating resonator with an intra-cavity etalon was designed to compress the spectrum of XeF blue-green laser. First, a grating resonator was used to obtain a sub-nanometer laser linewidth, and then, a further spectral compression was performed by inserting an etalon into the grating resonator. The experimental results show that a linewidth of 0.14 nm can be obtained by using a 1 200 line/mm grating, and the linewidth can be further compressed to 39 pm by inserting an etalon, with a reflectivity of 50%, in the grating resonator. The final laser pulse energy is about 65 mJ and the pulse duration is 1 μs. Although the gain coefficient of the XeF (C-A) laser is low, the optical loss of the resonator can be reasonably controlled by optimizing the working parameters of the grating and the etalon, thereby a 10pm-level laser linewidth can be realized.
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ZHU Feng, YU Li, YI Ai-ping, SHEN Yan-long, HUANG Chao. Spectral compression of XeF(C-A) excimer laser using grating resonator with an intra-cavity etalon[J]. Optics and Precision Engineering, 2018, 26(12): 2888
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Received: May. 3, 2018
Accepted: --
Published Online: Jan. 27, 2019
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