Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> Laser
The tunable CO<sub>2</sub> laser is a common pump source for optically pumped terahertz lasers. In this paper, based on a sealed-off CO<sub>2</sub> laser tube and a grating-tuned cavity, we reported an efficient, high-power, low-cost, simple structure and tunable continuous-w...
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2025-02-01
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| author | Lijie Geng Shuaifei Song Kun Yang Pengji Yan Zhenxiang Fu Yanchen Qu Ruiliang Zhang Zhifeng Zhang |
| author_facet | Lijie Geng Shuaifei Song Kun Yang Pengji Yan Zhenxiang Fu Yanchen Qu Ruiliang Zhang Zhifeng Zhang |
| author_sort | Lijie Geng |
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| description | The tunable CO<sub>2</sub> laser is a common pump source for optically pumped terahertz lasers. In this paper, based on a sealed-off CO<sub>2</sub> laser tube and a grating-tuned cavity, we reported an efficient, high-power, low-cost, simple structure and tunable continuous-wave CO<sub>2</sub> laser. A sealed-off CO<sub>2</sub> laser tube was designed and customized, and its plasma discharge characteristics were experimentally analyzed. The influence of output coupler transmittance and discharge current on the laser’s tunability and output power was systematically studied using grating tuning. A total of 78 spectral lines were achieved within the wavelength range of 9.17–10.86 μm. The maximum output power of 55.5 W was recorded on the 10P20 line when the output coupler transmittance was approximately 22%. The laser exhibited a beam spot radius of about 3.8 mm and a beam quality factor (M<sup>2</sup>) of 1.74. |
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| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
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| series | Photonics |
| spelling | doaj-art-b37af8bfa0bf4a8984d63ac4eb2a9c962025-08-20T03:43:14ZengMDPI AGPhotonics2304-67322025-02-0112318810.3390/photonics12030188Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> LaserLijie Geng0Shuaifei Song1Kun Yang2Pengji Yan3Zhenxiang Fu4Yanchen Qu5Ruiliang Zhang6Zhifeng Zhang7School of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450000, ChinaSchool of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450000, ChinaSchool of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450000, ChinaSchool of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450000, ChinaSchool of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450000, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450000, ChinaSchool of Electronic and Information, Henan Province Optoelectronic Sensing and Information Processing Engineering Technology Research Center, Zhengzhou University of Light Industry, Zhengzhou 450000, ChinaThe tunable CO<sub>2</sub> laser is a common pump source for optically pumped terahertz lasers. In this paper, based on a sealed-off CO<sub>2</sub> laser tube and a grating-tuned cavity, we reported an efficient, high-power, low-cost, simple structure and tunable continuous-wave CO<sub>2</sub> laser. A sealed-off CO<sub>2</sub> laser tube was designed and customized, and its plasma discharge characteristics were experimentally analyzed. The influence of output coupler transmittance and discharge current on the laser’s tunability and output power was systematically studied using grating tuning. A total of 78 spectral lines were achieved within the wavelength range of 9.17–10.86 μm. The maximum output power of 55.5 W was recorded on the 10P20 line when the output coupler transmittance was approximately 22%. The laser exhibited a beam spot radius of about 3.8 mm and a beam quality factor (M<sup>2</sup>) of 1.74.https://www.mdpi.com/2304-6732/12/3/188CO<sub>2</sub> lasersealed-off laserwavelength tuningcontinuous-wavegrating |
| spellingShingle | Lijie Geng Shuaifei Song Kun Yang Pengji Yan Zhenxiang Fu Yanchen Qu Ruiliang Zhang Zhifeng Zhang Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> Laser Photonics CO<sub>2</sub> laser sealed-off laser wavelength tuning continuous-wave grating |
| title | Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> Laser |
| title_full | Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> Laser |
| title_fullStr | Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> Laser |
| title_full_unstemmed | Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> Laser |
| title_short | Experimental Study of an Efficient, High Power and Tunable Continuous-Wave CO<sub>2</sub> Laser |
| title_sort | experimental study of an efficient high power and tunable continuous wave co sub 2 sub laser |
| topic | CO<sub>2</sub> laser sealed-off laser wavelength tuning continuous-wave grating |
| url | https://www.mdpi.com/2304-6732/12/3/188 |
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