半导体端面泵浦绿光激光器控制系统的设计与研究
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摘要
近些年,高功率的二极管泵浦固体激光器(DPSSL)一直以来都是国内外激光领域里的前沿课题,在制造和加工业中的应用越来越广泛。随着科学技术的发展及我国激光产业发展的要求,为改变国内以低端设备和传统激光器为主的现状,打造拥有自主知识产权的品牌全固态激光器已成为我国当前的迫切需要。
本文深入分析了二极管泵浦固体激光器的工作原理和相关理论,针对端面泵浦绿光激光器这一具体对象研究并设计了激光器的控制系统。论证并选择了可行的方案,研究、设计和实现了控制系统的硬件电路和软件程序。运用数字化控制技术、LCD显示技术、PC开关技术以及稳压、恒流技术,实现了泵浦源LD的恒功率控制、倍频晶体LBO的恒温控制和Q驱QS的高频信号控制等。以DSP芯片TMS320LF2407A为控制核心、辅以DS1302时钟芯片和多种逻辑门集成电路,实现了对电流、温度、频率等主要参数的高精度、高稳定性控制。达到的技术参数:LD的电流0～50A的范围可调、纹波±0.1A,温度15～30℃可调、纹波±0.1℃;LBO的温度26℃～60℃、纹波±0.1℃;QS高频信号1～100KHz可调、低电平脉宽1us不变,根据实际应用的需要低电平脉宽也可在1us～10us可调。
本文成功的完成了该款激光器控制系统的研究设计工作,通过了实验和相关参数的测试后组装样机,其输出的激光光束质量良好、能够长时间可靠稳定的工作。为高端激光器的研制提供了经验和借鉴,同时为研究其他高功率激光器产品奠定了基础。
High power diode pump solid state laser (DPSSL), which is widely used in the manufacturing and processing industries in resent years, is a frontier topic in laser fields at home and abroad. With the development of the science and technology and the demand of our country’s laser industry development, in order to change the current situation that low-end equipments and traditional lasers occupying domestic market, it is very urgent to develop the entire solid state laser with fully independent intellectual property.
This article analyzes the working principle and the correlation theories of diode pump solid state laser, designs the control system of the end-pump green light laser. It also makes arguments and chooses feasible plans. Through researching and designing, the hardware circuit and the software of the control system is finally realized. By use of various technologies including the numerical control technology, the LCD demonstration technology, the PC switch technology as well as the constant voltage-current technology, this article realizes the pump source LD permanent power control, the frequency multiplication crystal LBO constant temperature control and the Q drive QS high frequency signal control, etc. Using DSP chip TMS320LF2407A as the control core, together with DS1302 clock chip and many kinds of logical gate integrated circuits, it realizes a high precision and stability control to the main parameters such as the current, the temperature, the frequency and so on. The technical parameters that achieved include: LD current 0～50A (scope adjustable), ripple±0.1A; temperature 15～30℃adjustable, ripple±0.1℃; LBO temperature 26℃～60℃, ripple±0.1℃; QS high frequency signal 1～100KHz adjustable, low level pulse width 1us invariable .
This article researches and designs the control system of the end-pump green light laser. Through experiments and tests of correlation parameters, the prototype of the laser is assembled, which can output high quality laser-beam in a long period of time with stable status. It provides experiences for advanced laser development and lays a foundation for the research of other high power laser products.
本文深入分析了二极管泵浦固体激光器的工作原理和相关理论,针对端面泵浦绿光激光器这一具体对象研究并设计了激光器的控制系统。论证并选择了可行的方案,研究、设计和实现了控制系统的硬件电路和软件程序。运用数字化控制技术、LCD显示技术、PC开关技术以及稳压、恒流技术,实现了泵浦源LD的恒功率控制、倍频晶体LBO的恒温控制和Q驱QS的高频信号控制等。以DSP芯片TMS320LF2407A为控制核心、辅以DS1302时钟芯片和多种逻辑门集成电路,实现了对电流、温度、频率等主要参数的高精度、高稳定性控制。达到的技术参数:LD的电流0～50A的范围可调、纹波±0.1A,温度15～30℃可调、纹波±0.1℃;LBO的温度26℃～60℃、纹波±0.1℃;QS高频信号1～100KHz可调、低电平脉宽1us不变,根据实际应用的需要低电平脉宽也可在1us～10us可调。
本文成功的完成了该款激光器控制系统的研究设计工作,通过了实验和相关参数的测试后组装样机,其输出的激光光束质量良好、能够长时间可靠稳定的工作。为高端激光器的研制提供了经验和借鉴,同时为研究其他高功率激光器产品奠定了基础。
High power diode pump solid state laser (DPSSL), which is widely used in the manufacturing and processing industries in resent years, is a frontier topic in laser fields at home and abroad. With the development of the science and technology and the demand of our country’s laser industry development, in order to change the current situation that low-end equipments and traditional lasers occupying domestic market, it is very urgent to develop the entire solid state laser with fully independent intellectual property.
This article analyzes the working principle and the correlation theories of diode pump solid state laser, designs the control system of the end-pump green light laser. It also makes arguments and chooses feasible plans. Through researching and designing, the hardware circuit and the software of the control system is finally realized. By use of various technologies including the numerical control technology, the LCD demonstration technology, the PC switch technology as well as the constant voltage-current technology, this article realizes the pump source LD permanent power control, the frequency multiplication crystal LBO constant temperature control and the Q drive QS high frequency signal control, etc. Using DSP chip TMS320LF2407A as the control core, together with DS1302 clock chip and many kinds of logical gate integrated circuits, it realizes a high precision and stability control to the main parameters such as the current, the temperature, the frequency and so on. The technical parameters that achieved include: LD current 0～50A (scope adjustable), ripple±0.1A; temperature 15～30℃adjustable, ripple±0.1℃; LBO temperature 26℃～60℃, ripple±0.1℃; QS high frequency signal 1～100KHz adjustable, low level pulse width 1us invariable .
This article researches and designs the control system of the end-pump green light laser. Through experiments and tests of correlation parameters, the prototype of the laser is assembled, which can output high quality laser-beam in a long period of time with stable status. It provides experiences for advanced laser development and lays a foundation for the research of other high power laser products.
引文
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5. Jeff Squier, Francois Salin. Gerard AMourou, etal.100-fs Pulse generation and amplification in Ti:A1203. Opt. Let, 1991,16(5):321
6. W.E. White, J.R. Hunter, L. Van. Woerkom, et al.120-fs terawatte Ti:A1203/Cr:LiSrAlF6 laser system. Opt. Let, 1992, 17(15):1067
7. Tetsuo Kojima,Sasuma Konno,Shuichi Fujikawa. 20-W ultraviolet beam generation by forth-harmonic generation of an all-solid-state laser. Opt. Let,2000,25(l):58-60
8. Kent C. Burr,C.L. Tang,Mark A. Arbore,et al. broadly tunable mid-infrared femtosecond optical parametric oscillator using all-solid-state Pumped Periodically poled lithiumniobatr. Opt. Let, 1997,22(19):1458
9.余建华,李景镇,黄建军等,激光艺术演示[J],激光与红外,1998,28(3): 145-148
10. I.Drywe. Laser color display and entertainment applicant[J], Laser Focus World,1991,9
11.叶志生,珠宝忠,高惠敏等,激光在皮肤病学应用中的最新进展,光电子激光,2000,11(6):677-680
12.谢兴华,刘春泰,激光加工技术在汽车工业中的应用,激光集锦,1997,7(3):59-60
13.刘振,硕士毕业论文,西北大学,2006
14. Susumu Konno,Tetsuo Kojima,Shuichi Fujikawa et al. High-brightness 138W green laser based on intracavity-frequency-doubled diode-side-Pumped Q-switched Nd:YAG laser,Opt. Let,2000,25(2):105-107
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18.何京良等.激光二极管泵浦Nd:YVO4/LBO腔内倍频瓦级连续波绿光激光器。光学学报,1998,15(7):562~565
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20.田丰,谢慧明,陈浩伟等.半导体激光端泵内腔倍频Nd:YVO4/LBO连续波8W绿光激光器,光子学报,2004,33(6):651-653
21.冯衍,毕勇,张鸿博等. 20W腔外倍频全固态Nd:YAG绿光激光器,光学学报.2003:23(4)469-471
22.徐德刚,姚建栓,郭丽等. 104W内腔倍频全固态Nd:YAG绿光激光器。光学学报,2004:24(7)925-928
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27.蓝信钜等.激光技术[M].北京:科学出版社,2000
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31. TYFnaetal.IEEEJ.Q-E,24(6),(1988)895
32.刘凤芹.硕士论文.山东师范大学,济南,2003
33.吕百达.固体激光器件[M].北京:北京邮电大学出版社,2002
34.刘杰,杨济民,何京良. DL抽运Nd:YVO4、Nd: GdVO4和Nd:YAG激光特性比较(J).激光杂志,2003,24(5):28-29
35.张庆礼,殷绍唐,王爱华等. Nd: GdVO4晶体的生长和光谱特性(J).量子电子学报,2002,19(4):310-313
36. Kato K.Temperature-tuned 900 phased-matching properties of LiB3O5[J]. IEEE J.Quant. Elecortn.,1994,30(12):2950-2952
37.干福熹.信息材料[M].天津:天津大学出版社,2000.537-598
38.刘均海,卢建仁,吕军华等.半导体激光器端面抽运高功率Nd:YVO4固体激光器[J].中国激光,2000,A27(2):110-112
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40. http://www.brightsolutions.com/
41. Gooch & Housego,NEOS Technologies,technical data
42.刘伟,肖旭辉.高功率绿光激光器的控制研究[J].成都:自动化信息2008(7):46-47
43.张毅刚,赵光权,孙宁,俞洋. DSP原理、开发与应用[M].哈尔滨:哈尔滨工业大学出版社,2006
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46.郑宏军. 2.5Gbit/t光发射模块的中心频率稳定性研究[J].光通讯研究,2000,(97):42-45
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