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摘要: 采用双声光调制器光路快速偏转技术与自准直光栅法实现CO2激光全波段快调谐同光路输出。首先对声光调制器特性进行实验研究，结果显示：声光调制器偏转角度约为4.4°，与运用布拉格方程计算结果相符；且激光单次通过声光调制器移频量为40.68 MHz，与声光驱动器射频频率一致，将激光往返多次经声光调制器的移频量叠加。进而，开展基于声光调制器的CO2激光快调谐实验研究，运用两个对称布置的同驱动频率声光调制器补偿声光移频，实现偏转光路振荡输出，运用光栅法在直线光路中实现激光全波段可调谐输出。最终，在声光调制器时序控制下，实现双波长激光快调谐同光路输出，选定激光波长的切换时间约为1 ms，脉宽小于300 ns，且双波长切换速度不受CO2激光跃迁谱带的限制。Abstract: A rapid tuning pulsed CO2 laser is presented using a blazed grating system and a pair of acousto-optic modulators. Firstly, the characteristics of acousto-optic modulators were studied through experimentation. The results showed that the deflection angle of the acousto-optic modulator was approximately 4.4°, which was in agreement with the calculations of the Bragg equation. When a single laser passed the acousto-optic modulator, the shift in frequency was approximately 40.68 MHz, which was in agreement with the acousto-optic driving frequency. In addition, when multiple lasers passed through the acousto-optic modulator, the shift in frequency was compounded. Based on the acousto-optic modulator results, experimental research was performed on rapid tuning pulsed CO2 lasers. In order to offset the shift in acousto-optic frequency, two acousto-optic modulators were placed symmetrically in the deflected optical beam, and a laser output was obtained. Using a blazed grating, a full band tunable output laser was obtained in the linear optical beam. Finally, under sequential control of double acousto-optic modulators, a double wavelength laser with rapid tuning output and a common optical axis was obtained. The tuning time of the pulsed laser was approximately 1 ms, which pulsed at a width of less than 300 ns. The tuning speed of the pulsed laser was independent of the transition band of the CO2 laser.
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Key words:
- CO2 laser /
- rapidly tunable /
- acousto-optic modulator /
- grating
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图 4 声光调制器时序控制示意图
Figure 4. Schematic of sequential control of the acousto-optic modulator
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[1] KOVACS M A, DRYDEN G L, POHLE R H, et al.. HI-CLASS on AEOS:a large-aperture laser radar for space surveillance/situational awareness investigations[J]. Proceedings of SPIE, 2001, 4490:298-306. doi: 10.1117/12.455438 [2] 罗青山, 郭唐永, 姚运生.适用于立方体卫星的激光测距合作目标[J].光学 精密工程, 2017, 25(7):1705-1713. http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201707003LUO Q SH, GUO T Y, YOU Y SH. Laser ranging cooperative target for CubeSa[J]. Opt. and Precision Eng., 2017, 25(7):1705-1713.(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201707003 [3] 王超杰, 王博, 郭慧楠, 等.空间飞行器平台大气密度的在轨测量[J].光学 精密工程, 2017, 25(1):15-20. http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201701003WANG CH J, WANG B, GUO H N, et al.. Online measurement of atmospheric density based on space vehicle platform[J]. Optics and Precision Engineering, 2017, 25(1):15-20.(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201701003 [4] 王惠琴, 姚宇, 曹明华.沙尘天气下激光信号的传输特性[J].发光学报, 2017, 38(4):521-529. http://d.old.wanfangdata.com.cn/Periodical/fgxb201704016WANG H Q, YAO Y, CAO M H. Transmission characteristics of laser signal in sand and dust weather[J]. Chinese Journal of Luminescence, 2017, 38(4):521-529.(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/fgxb201704016 [5] 吕韬, 张合勇, 郭劲, 等.远距离语音的激光相干获取及增强[J].光学 精密工程, 2017, 25(3):569-575. http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201703003LÜ T, ZHANG H Y, GUO J, et al.. Acquisition and enhancement of remote voice based on laser coherent method[J]. Opt. Precision Eng., 2017, 25(3):569-575.(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201703003 [6] HOLLY S, IKEN A. Carbon dioxide Probe laser with rapid wavelength switching[J]. Soc. Opt. Eng., 1977, 122:45-52. [7] BEN-DAVID A, EMERY S L, GOTOFF S W, et al.. High Pulse repetition frequency, multiple wavelength, pulsed CO2 lid arsystem for atmospheric transmission and target reflectance measurements[J]. Applied Optics, 1992, 31(21):4224-4232. doi: 10.1364/AO.31.004224 [8] FAXVOG F R, MOCKER H W. Rapidly tunable CO2 TEA laser[J]. Applied Optics, 1982, 21(22):3986-3987. doi: 10.1364/AO.21.003986 [9] 曲彦臣, 任德明, 胡孝勇, 等.小型TEA CO2激光器的快速调谐技术研究[J].激光技术, 2003, 27(6):547-550. doi: 10.3969/j.issn.1001-3806.2003.06.013QU Y C, REN D M, HU X Y, et al.. Research of rapidly tuning technology of miniature TEA CO2 laser[J]. Laser Technology, 2003, 27(6):547-550.(in Chinese) doi: 10.3969/j.issn.1001-3806.2003.06.013 [10] 任德明, 王元虎, 曲彦臣, 等.采用扫描振镜方式的快调谐TEA CO2激光器[J].中国激光, 2007, 34(8):1027-1031. doi: 10.3321/j.issn:0258-7025.2007.08.001REN DM, WANG Y H, QU Y CH, et al..Rapidly tuned TEA CO2 laser by a scanning mirror[J]. Chinese Journal of Lasers, 2007, 34(8):1027-1031.(in Chinese) doi: 10.3321/j.issn:0258-7025.2007.08.001 [11] 程永强, 谭荣清, 郑义军, 等.光栅选线TEA CO2激光快速调谐实验研究[J].红外与激光工程, 2007, 36(5):635-638. doi: 10.3969/j.issn.1007-2276.2007.05.014CHENG Y Q, TAN R Q, ZHENGY J, et al.. Rapidly tunable experiment of grating line selectable TEA CO2 laser[J]. Infrared and Laser Engineering, 2007, 36(5):635-638.(in Chinese) doi: 10.3969/j.issn.1007-2276.2007.05.014 [12] 何洋, 陆君, 陈飞, 等.声光调Q CO2激光器的实验研究[J].红外与激光工程, 2015, 44(8):2280-2285. doi: 10.3969/j.issn.1007-2276.2015.08.008HE Y, LU J, CHEN F, et al.. Experimental researches on acousto-optic Q-switched CO2 laser[J]. Infrared and Laser Engineering, 2015, 44(8):2280-2285.(in Chinese) doi: 10.3969/j.issn.1007-2276.2015.08.008 [13] 潘其坤, 谢冀江, 阮鹏, 等.声光调Q CO2激光器的输出特性[J].中国光学, 2012, 5(3):283-288. doi: 10.3969/j.issn.2095-1531.2012.03.014PAN Q K, XIE J J, RUAN P, et al.. Output performance of acousto-optic Q-switched CO2 laser[J]. Chinese Optics, 2012, 5(3):283-288.(in Chinese) doi: 10.3969/j.issn.2095-1531.2012.03.014 [14] XIE J J, PAN Q K, GUO R H, et al.. Dynamical analysis of acousto-optically Q-switched CO2 laser[J]. Optics and Laser in Engineering, 2012, 50(2): 159-164. doi: 10.1016/j.optlaseng.2011.09.014 [15] 潘其坤, 陈飞, 石宁宁, 等.声光调Q CO2激光器波长调谐理论分析与实验研究[J].红外与激光工程, 2017, 46(7):0705002. http://d.old.wanfangdata.com.cn/Periodical/hwyjggc201707011PAN Q K, CHEN F, SHI N N, et al.. Theoretical analysis and experimental research on tunable acousto-optic Q-switched CO2 laser[J]. Optics and Laser in Engineering, 2017, 46(7):0705002.(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/hwyjggc201707011 [16] 周炳琨, 高以智, 陈倜嵘, 等.激光原理[M].北京:国防工业出版社, 2008.ZHOU B K, GAO Y ZH, CHEN T R, et al.. Laser Principle[M]. Beijing:National Defense Industry Press, 2008.(in Chinese) -
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