电光可调谐1064nm单频Nd:YAG激光器设计与实验研究
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摘要
为了产生1064nm单频可调谐Nd:YAG激光输出,设计了一种二极管抽运电光可调谐单频Nd:YAG激光器,采用偏振分光棱镜(PBS)和铌酸锂(LN)晶体组成电光双折射滤光片,作为激光单纵模选择元件和频率调谐元件。理论分析了其选模原理及调频原理,实验研究了1064nm Nd:YAG激光单纵模振荡特性和调频特性。实验结果表明:这种Nd:YAG激光器能以线偏振单纵模稳定振荡,当改变加在LN晶体上的横向电压时,1064nm单纵模激光振荡波长调谐量为0.474nm,相应的频率调谐量为142.2GHz。这种电光可调谐1064nm单频Nd:YAG激光器可广泛应用于激光干涉测量、激光雷达探测和激光光谱学等领域。
In order to produce the single frequency tunable laser output at 1064 nm,a diode-pumped electro-optically tunable single frequency Nd:YAG laser is designed,which includes an electro-optically birefringent filter(PBS-LN) consisting of both a polarizing beam splitter(PBS)and a lithium niobate(LN)crystal,used as both a single longitudinal mode selector and a frequency tuning element.The principles of mode selection and frequency tuning of the PBS-LN are theoretically analyzed,and the characteristics of single longitudinal mode oscillation and frequency tuning of the Nd:YAG laser at 1064 nm are investigated experimentally.The experimental results have shown that the Nd:YAG laser can steadily oscillate in linearly polarized single longitudinal mode,and by changing the transverse voltages applied to the LN element,the wavelength of single longitudinal mode laser at 1064 nm can be tuned by 0.474 nm,corresponding to the frequency tuning of 142.2 GHz.Such an electro-optically tunable single frequency Nd:YAG laser will find wide applications in the fields of laser interferometry,laser radar detection and laser spectroscopy,etc.
In order to produce the single frequency tunable laser output at 1064 nm,a diode-pumped electro-optically tunable single frequency Nd:YAG laser is designed,which includes an electro-optically birefringent filter(PBS-LN) consisting of both a polarizing beam splitter(PBS)and a lithium niobate(LN)crystal,used as both a single longitudinal mode selector and a frequency tuning element.The principles of mode selection and frequency tuning of the PBS-LN are theoretically analyzed,and the characteristics of single longitudinal mode oscillation and frequency tuning of the Nd:YAG laser at 1064 nm are investigated experimentally.The experimental results have shown that the Nd:YAG laser can steadily oscillate in linearly polarized single longitudinal mode,and by changing the transverse voltages applied to the LN element,the wavelength of single longitudinal mode laser at 1064 nm can be tuned by 0.474 nm,corresponding to the frequency tuning of 142.2 GHz.Such an electro-optically tunable single frequency Nd:YAG laser will find wide applications in the fields of laser interferometry,laser radar detection and laser spectroscopy,etc.
引文
1 Zheng Yaohui,Li Fengqin,Zhang Kuanshou,et al..Progress of all-solid-state single-frequency laser[J].Chinese J Lasers,2009,36 (7):1635-1642.郑耀辉,李凤琴,张宽收,等.全固态单频激光器研究进展[J].中国激光,2009,36(7):1635-1642.
2 AOwyoung,P Esherick.Stress-induced tuning of a diode-laserexcited monolithic Nd:YAG laser[J].Opt Lett,1987,12(12):999-1001.
3 VEvtuhov,A E Siegman.Twisted-mode technique for obtaining axially uniform energy density in a laser cavity[J].Appl Opt,1965,4(1):142-143.
4 Zheng Yaohui,Wang Yajun,Peng Kunchi.Single-end pumping,single-frequency Nd:YVO4/LBO laser with output power of21 .5W[J].Chinese J Lasers,2012,39(6):0602011.郑耀辉,王雅君,彭堃墀.输出功率为21.5 W的单端抽运Nd:YVO4/LBO单频激光器[J].中国激光,2012,39(6):0602011.
5 Yang Xiaoping,Wang Chunxiang,Feng Jinxia,et al..9 Wallsolid-state continuous-wave single-frequency 1.34μm Nd:YVO4laser[J].Chinese J Lasers,2013,40(6):0602019.杨小平,王春香,冯晋霞,等.9 W全固态连续单频1.34μm Nd:YVO4激光器[J].中国激光,2013,40(6):0602019.
6 Zhang Jing,Lei Hongxiang,Wang Shaokai,et al..All-solidstate single-frequency and intracavity-frequency-doubled Nd:YVO4laser with fold-cavity[J].Chinese J Lasers,2001,28(11):971-973.张靖,雷宏香,王少凯,等.可调谐全固化折叠腔单频倍频Nd:YVO4激光器[J].中国激光,2001,28(11):971-973.
7 GL Friel,A J Kemp,T K Lake,et al..Compact and efficient Nd:YVO4laser that generates a tunable single-frequency green output[J].Appl Opt,2000,39(24):4333-4337.
8 Zheng Quan,Zhao Ling,Tan Huiming,et al..Single-frequency CW and pulse operation of diode-pumped green lasers[J].Chinese J Lasers,2002,29(9):769-772.郑权,赵岭,檀慧明,等.用布氏片实现有效连续和脉冲单频绿光输出[J].中国激光,2002,29(9):769-772.
9 Zhao Yonghua,Liu Yupu,Zhang Yinghua.Design of BF for tunable broadband solid-state lasers[J].Chinese J Lasers,1995,22 (9):641-644.赵永华,刘玉璞,张影华.宽调谐固体激光器的BF设计[J].中国激光,1995,22(9):641-644.
10 W R Trutna,Jr,D K Donald.Two-piece,piezoelectrically tuned,single-mode Nd:YAG ring laser[J].Opt Lett,1990,15(7):369-371.
11 Lin Yueming,He Huijuan.Frequency tuning characteristics of diode-pumped Nd:YVO4laser[J].Acta Optica Sinica,1995,15(9):1189-1194.林岳明,何慧娟.二极管激光泵浦Nd:YVO4激光器的频率调谐特性研究[J].光学学报,1995,15(9):1189-1194.
12 B V Zhdanov,F Kontur,S Phipps,et al..Tunable single frequency cesium laser[J].Opt Commun,2007,280:161-164.
13 Xie Shiyong,Lu Yuanfu,Bo Yong,et al..High power tunable single-frequency 1064nm quasi-continuous-wave laser oscillatoramplifier system[J].Acta Physica Sinica,58(7):4659-4663.谢仕永,鲁远甫,薄勇,等.高功率可调谐1064nm准连续单频激光振荡-放大系统研究[J].物理学报,2009,58(7):4659-4663.
14 PA Schulz,S R Henion.Frequency-modulated Nd:YAG laser[J].Opt Lett,1991,16(8):578-580.
15 Y H Zheng,H D Lu,Y M Li,et al..Broadband and rapid tuning of an all-solid-state-stage single-frequency Nd:YVO4laser[J].Appl Phys B,2008,90(3-4):485-488.
16 Jiao Mingxing,Xing Junhong,Liu Yun,et al..Design and experimental study of two-cavity dual-frequency all-solid-state laser with large frequency difference[J].Chinese J Lasers,2010,37 (11):2784-2789.焦明星,邢俊红,刘芸,等.双腔大频差双频全固态激光器设计与实验研究[J].中国激光,2010,37(11):2784-2789.
2 AOwyoung,P Esherick.Stress-induced tuning of a diode-laserexcited monolithic Nd:YAG laser[J].Opt Lett,1987,12(12):999-1001.
3 VEvtuhov,A E Siegman.Twisted-mode technique for obtaining axially uniform energy density in a laser cavity[J].Appl Opt,1965,4(1):142-143.
4 Zheng Yaohui,Wang Yajun,Peng Kunchi.Single-end pumping,single-frequency Nd:YVO4/LBO laser with output power of21 .5W[J].Chinese J Lasers,2012,39(6):0602011.郑耀辉,王雅君,彭堃墀.输出功率为21.5 W的单端抽运Nd:YVO4/LBO单频激光器[J].中国激光,2012,39(6):0602011.
5 Yang Xiaoping,Wang Chunxiang,Feng Jinxia,et al..9 Wallsolid-state continuous-wave single-frequency 1.34μm Nd:YVO4laser[J].Chinese J Lasers,2013,40(6):0602019.杨小平,王春香,冯晋霞,等.9 W全固态连续单频1.34μm Nd:YVO4激光器[J].中国激光,2013,40(6):0602019.
6 Zhang Jing,Lei Hongxiang,Wang Shaokai,et al..All-solidstate single-frequency and intracavity-frequency-doubled Nd:YVO4laser with fold-cavity[J].Chinese J Lasers,2001,28(11):971-973.张靖,雷宏香,王少凯,等.可调谐全固化折叠腔单频倍频Nd:YVO4激光器[J].中国激光,2001,28(11):971-973.
7 GL Friel,A J Kemp,T K Lake,et al..Compact and efficient Nd:YVO4laser that generates a tunable single-frequency green output[J].Appl Opt,2000,39(24):4333-4337.
8 Zheng Quan,Zhao Ling,Tan Huiming,et al..Single-frequency CW and pulse operation of diode-pumped green lasers[J].Chinese J Lasers,2002,29(9):769-772.郑权,赵岭,檀慧明,等.用布氏片实现有效连续和脉冲单频绿光输出[J].中国激光,2002,29(9):769-772.
9 Zhao Yonghua,Liu Yupu,Zhang Yinghua.Design of BF for tunable broadband solid-state lasers[J].Chinese J Lasers,1995,22 (9):641-644.赵永华,刘玉璞,张影华.宽调谐固体激光器的BF设计[J].中国激光,1995,22(9):641-644.
10 W R Trutna,Jr,D K Donald.Two-piece,piezoelectrically tuned,single-mode Nd:YAG ring laser[J].Opt Lett,1990,15(7):369-371.
11 Lin Yueming,He Huijuan.Frequency tuning characteristics of diode-pumped Nd:YVO4laser[J].Acta Optica Sinica,1995,15(9):1189-1194.林岳明,何慧娟.二极管激光泵浦Nd:YVO4激光器的频率调谐特性研究[J].光学学报,1995,15(9):1189-1194.
12 B V Zhdanov,F Kontur,S Phipps,et al..Tunable single frequency cesium laser[J].Opt Commun,2007,280:161-164.
13 Xie Shiyong,Lu Yuanfu,Bo Yong,et al..High power tunable single-frequency 1064nm quasi-continuous-wave laser oscillatoramplifier system[J].Acta Physica Sinica,58(7):4659-4663.谢仕永,鲁远甫,薄勇,等.高功率可调谐1064nm准连续单频激光振荡-放大系统研究[J].物理学报,2009,58(7):4659-4663.
14 PA Schulz,S R Henion.Frequency-modulated Nd:YAG laser[J].Opt Lett,1991,16(8):578-580.
15 Y H Zheng,H D Lu,Y M Li,et al..Broadband and rapid tuning of an all-solid-state-stage single-frequency Nd:YVO4laser[J].Appl Phys B,2008,90(3-4):485-488.
16 Jiao Mingxing,Xing Junhong,Liu Yun,et al..Design and experimental study of two-cavity dual-frequency all-solid-state laser with large frequency difference[J].Chinese J Lasers,2010,37 (11):2784-2789.焦明星,邢俊红,刘芸,等.双腔大频差双频全固态激光器设计与实验研究[J].中国激光,2010,37(11):2784-2789.