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西北核技术研究所 激光与物质相互作用国家重点实验室,陕西 西安 710024
[ "朱峰(1983-), 男, 湖北襄阳人, 助理研究员,2005年于武汉大学获得学士学位, 2008年于西北核技术研究所获得硕士学位, 现主要从事高功率激光器件技术与应用方面的研究。E-mail:zhufeng@nint.ac.cn" ]
[ "于力(1969-), 男, 陕西西安人, 研究员, 1991年于陕西师范大学获得学士学位, 1998年和2007年于西北核技术研究所分别获得硕士和博士学位, 现主要从事激光技术及应用方面的研究。E-mail: yuli@nint.ac.cn" ]
收稿日期:2018-05-03,
录用日期:2018-7-20,
纸质出版日期:2018-12-25
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朱峰, 于力, 易爱平, 等. 内置标准具光栅腔XeF(C-A)准分子激光器的线宽压缩[J]. 光学 精密工程, 2018,26(12):2888-2893.
Feng ZHU, Li YU, Ai-ping YI, et al. Spectral compression of XeF(C-A) excimer laser using grating resonator with an intra-cavity etalon[J]. Optics and precision engineering, 2018, 26(12): 2888-2893.
朱峰, 于力, 易爱平, 等. 内置标准具光栅腔XeF(C-A)准分子激光器的线宽压缩[J]. 光学 精密工程, 2018,26(12):2888-2893. DOI: 10.3788/OPE.20182612.2888.
Feng ZHU, Li YU, Ai-ping YI, et al. Spectral compression of XeF(C-A) excimer laser using grating resonator with an intra-cavity etalon[J]. Optics and precision engineering, 2018, 26(12): 2888-2893. DOI: 10.3788/OPE.20182612.2888.
为了避免阳光背景干扰,针对XeF(C-A)蓝绿激光水下应用需求开展了激光线宽压缩实验以提高信噪比。采用内置标准具的光栅谐振腔开展相关实验。利用光栅腔实现亚纳米级的激光线宽输出,然后在此基础上,通过插入标准具进行更精细的激光线宽压缩实验。利用光栅腔,采用1 200线/mm光栅并提高光栅辐照面积可以实现0.14 nm的激光线宽输出。腔内插入反射率为50%的标准具,可以进一步将激光线宽压缩至39 pm,激光单脉冲能量约为65 mJ,脉冲宽度为1
μ
s。实验结果表明:尽管XeF(C-A)蓝绿激光器的增益系数较低,但是通过优化光栅和标准具的工作参数,对谐振腔光学损耗进行合理的控制,激光器可以实现10 pm量级的激光线宽输出。
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
μ
s. 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 10 pm-level laser linewidth can be realized.
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