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Based on the semiclassical density matrix theory and vibrational relaxation theory, the present paper studies the influences on optical pumping THz lasers output power due to adding an appropriate proportion of buffer gas and appropriately reducing the waveguide core diameter. Results prove that adding appropriate proportion of buffer gas or appropriately reducing the waveguide core diameter can increase the output of light intensity of THz laser. Optimizing the two parameters at the same time can further improve the efficiency of pumping laser energy into THz laser energy, extend the effective activation area of the working cavity, put off the appearance of the pumping saturation effect, and increase the output power of the THz lasers. This research may have a guiding significance for the THz optical pumping laser in improving energy conversion efficiency, and increasing the output power so as to bring about the miniaturization of THz optical pumping laser.
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Keywords:
- terahertz (THz) /
- vibrational bottleneck effect /
- buffer gas /
- core diameter
[1] Jiu Z X, Zuo D L, Miao L, Qi C C, Cheng Z H 2010 Chin. Phys. Lett. 27 24211
[2] Jiu Z X, Zuo D L, Miao L, Cheng Z H 2010 Journal of Infrared Millimeter and Terahertz Waves 31 1422
[3] Miao L, Zuo D L, Jiu Z X, Cheng Z H 2011 High Power Laser and Particle Beams 23 2565 (in Chinese) [苗亮, 左都罗, 纠智先, 程祖海 2011 强激光与粒子束 23 2565]
[4] Mueller E R, Henschke R, Robotham W E 2007 Appl. Opt. 46 4907
[5] Federici J F, Schulkin B, Huanget F 2005 Semicond. Sci. Technol. 20 S266
[6] Fu S Y, Tian Z S, Yi F L J 2008 Harbin Institute of Technology 40 435 (in Chinese) [付石友, 田兆硕, 衣福龙 2008 哈尔滨工业大学学报 40 435]
[7] Wu L, Ling F R, Liu J S 2009 Laser & Optoelectronics Progress 46 29 (in Chinese) [吴亮, 凌福日, 刘劲松 2009 激光与光电子学进展 46 29]
[8] Thomas A, Detemple 1976 IEEE J. Quant. Electron. 12 40
[9] Behn R, Kjelberg I, Morgan P D, Okada T, Siegrist M R 1983J. Appl. Phys. 54 2995
[10] Behn R, Dupertuis R, Kjelberg M A, Krug I, Salito P, Siegrist S 1985 IEEE J. Quant. Electron. 21 1278
[11] Hodges D T, Tucker J R, Hartwick T S 1976 Infrared Phys. 16 175
[12] Mansfield D K, Horlbeck E, Bennett C L, Chouinard R 1985 International Journal of Infrared and Millimeter Waves 6 867
[13] Chang T Y, Lin C 1976 J. Opt. Soc. Am. 66 362
[14] He Z H, Yao J Q, Shi H F, Huang X, Luo X Z, Jiang S J, Wang P 2007 Acta. Phys. Sin. 56 5802 (in Chinese) [何志红, 姚建铨, 时华锋, 黄晓, 罗锡璋, 江绍基, 王鹏 2007 物理学报 56 5802]
[15] He Z H, Yao J Q, Shi H F, Huang X, Luo X Z, Jiang S J, Li J R, Wang P 2007 Acta. Phys. Sin. 56 6451 (in Chinese) [何志红, 姚建铨, 时华锋, 黄晓, 罗锡璋, 江绍基, 李建荣, 王鹏 2007 物理学报 56 6451]
[16] Zhang P, Jiang A J, Chen M N, Luo X Z, Zhang X 2004 Journal of Optoelectronics·Laser 15 1040 (in Chinese) [张萍, 蒋爱军, 陈曼娜, 罗锡璋, 张迅 2004 光电子·激光 15 1040]
[17] Qin J Y, Zheng X S, Luo X Z, Huang X, Lin Y K 1998 IEEE Journal of Quantum Electronics 34 32
[18] Liu Y, Xu J, Lai J Q, Xu X, Shen F, Wei Y Y, Huang M Z, Tang T, Gong Y B 2012 Chin. Phys. B 21 074202
[19] Xie H Y, Wang L, Zhao L J, Zhu H L, Wang W 2007 Chin. Phys. 16 1459
[20] Chang T Y, Lin C 1976 J. Opt Soc Am. 66 362
[21] Redon M, Gastaud C, Fourrier M 1979 IEEE J. Q. E 15 412
[22] Lawandy N M, Koepf G A 1980 Opt. Lett. 5 366
[23] Schwartz R N, Slawsky Z I, Herzfeld K F 1952 J. Cherm. Phys. 20 1591
[24] Frank I, Tanczos, 1956 J. Cherm. Phys. 25 439
[25] Dickens P G, Ripamonti A 1961 Trans. Faraday Soc. 57 735
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[1] Jiu Z X, Zuo D L, Miao L, Qi C C, Cheng Z H 2010 Chin. Phys. Lett. 27 24211
[2] Jiu Z X, Zuo D L, Miao L, Cheng Z H 2010 Journal of Infrared Millimeter and Terahertz Waves 31 1422
[3] Miao L, Zuo D L, Jiu Z X, Cheng Z H 2011 High Power Laser and Particle Beams 23 2565 (in Chinese) [苗亮, 左都罗, 纠智先, 程祖海 2011 强激光与粒子束 23 2565]
[4] Mueller E R, Henschke R, Robotham W E 2007 Appl. Opt. 46 4907
[5] Federici J F, Schulkin B, Huanget F 2005 Semicond. Sci. Technol. 20 S266
[6] Fu S Y, Tian Z S, Yi F L J 2008 Harbin Institute of Technology 40 435 (in Chinese) [付石友, 田兆硕, 衣福龙 2008 哈尔滨工业大学学报 40 435]
[7] Wu L, Ling F R, Liu J S 2009 Laser & Optoelectronics Progress 46 29 (in Chinese) [吴亮, 凌福日, 刘劲松 2009 激光与光电子学进展 46 29]
[8] Thomas A, Detemple 1976 IEEE J. Quant. Electron. 12 40
[9] Behn R, Kjelberg I, Morgan P D, Okada T, Siegrist M R 1983J. Appl. Phys. 54 2995
[10] Behn R, Dupertuis R, Kjelberg M A, Krug I, Salito P, Siegrist S 1985 IEEE J. Quant. Electron. 21 1278
[11] Hodges D T, Tucker J R, Hartwick T S 1976 Infrared Phys. 16 175
[12] Mansfield D K, Horlbeck E, Bennett C L, Chouinard R 1985 International Journal of Infrared and Millimeter Waves 6 867
[13] Chang T Y, Lin C 1976 J. Opt. Soc. Am. 66 362
[14] He Z H, Yao J Q, Shi H F, Huang X, Luo X Z, Jiang S J, Wang P 2007 Acta. Phys. Sin. 56 5802 (in Chinese) [何志红, 姚建铨, 时华锋, 黄晓, 罗锡璋, 江绍基, 王鹏 2007 物理学报 56 5802]
[15] He Z H, Yao J Q, Shi H F, Huang X, Luo X Z, Jiang S J, Li J R, Wang P 2007 Acta. Phys. Sin. 56 6451 (in Chinese) [何志红, 姚建铨, 时华锋, 黄晓, 罗锡璋, 江绍基, 李建荣, 王鹏 2007 物理学报 56 6451]
[16] Zhang P, Jiang A J, Chen M N, Luo X Z, Zhang X 2004 Journal of Optoelectronics·Laser 15 1040 (in Chinese) [张萍, 蒋爱军, 陈曼娜, 罗锡璋, 张迅 2004 光电子·激光 15 1040]
[17] Qin J Y, Zheng X S, Luo X Z, Huang X, Lin Y K 1998 IEEE Journal of Quantum Electronics 34 32
[18] Liu Y, Xu J, Lai J Q, Xu X, Shen F, Wei Y Y, Huang M Z, Tang T, Gong Y B 2012 Chin. Phys. B 21 074202
[19] Xie H Y, Wang L, Zhao L J, Zhu H L, Wang W 2007 Chin. Phys. 16 1459
[20] Chang T Y, Lin C 1976 J. Opt Soc Am. 66 362
[21] Redon M, Gastaud C, Fourrier M 1979 IEEE J. Q. E 15 412
[22] Lawandy N M, Koepf G A 1980 Opt. Lett. 5 366
[23] Schwartz R N, Slawsky Z I, Herzfeld K F 1952 J. Cherm. Phys. 20 1591
[24] Frank I, Tanczos, 1956 J. Cherm. Phys. 25 439
[25] Dickens P G, Ripamonti A 1961 Trans. Faraday Soc. 57 735
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