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Optical parametric frequency up-conversion and amplification, used for ultra-weak infrared image detection, is investigated both numerically and experimentally. A circum-circle model of spatial filtering is proposed to suppress the parametric fluorescence background noise. Combining the spatial filter, image relay module and band-pass filter, the fluorescence noise is suppressed by 70%. Accordingly, the image quality is significantly improved and the peak signal-to-noise ratio is increased by 22%. Based on the 10 Hz, mJ-level, 355 nm picosecond pump laser, the weak infrared image is amplified and up-converted into the visible region, and over 1.3108 (82 dB) optical gain is obtained at the same time. Our experiment demonstrates that the detection sensitivity of the conventional uncooled CCD can be as high as 7.4 photons per pixel when the high gain OPA is used as an image preamplifier. The scheme in this paper is expected to be used in single-photon-level sensitive infrared imaging.
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Keywords:
- optical parametric amplification /
- optical gain /
- circum-circle model /
- peak signal-to-noise ratio
[1] Hou W, Yu Q F, Lei Z H, Liu X C 2014 Acta Phys. Sin. 63 074208 (in Chinese) [侯旺, 于起峰, 雷志辉, 刘晓春 2014 物理学报 63 074208]
[2] Song C X, Ma K, Qin C, Xiao P 2013 Acta Phys. Sin. 62 040702 (in Chinese) [宋长新, 马克, 秦川, 肖鹏 2013 物理学报 62 040702]
[3] Moon J A, Mahon R, Duncan M D, Reintjes J 1994 Opt. Lett. 19 1234
[4] Vainos N A, Gower M C Opt. Lett. 16 363
[5] Sternklar S, Jackel S, Chomsky D, Zigler A 1990 Opt. Lett. 15 616
[6] Midwinter J E 1968 Appl. Phys. Lett. 12 68
[7] Choi S K, Vasilyev M, Kumar P 1999 Phys. Rev. Lett. 83 1938
[8] Zhang J Y, Shreenath A P, Kimmel M, Zeek E, Trebino R 2003 Opt. Express 11 601
[9] Xiao K, Zhang J, Lin B, Zhang Q L, Zhang D X, Feng B H, Zhang J Y 2014 Opt. Commun. 326 48
[10] Devaux F, Lantz E 1995 J. Opt. Soc. Am. B 12 2245
[11] Lantz E, Devaux F 2008 J. Sel. Top. Quantum Electron 14 635
[12] Vasilyev M, Stelmakh N, Kumar P 2009 J. Mod. Opt. 56 2029
[13] Li X Q, Yang J, Sheng X Z, Zhang J Y, Cui D F, Peng Q J, Xu Z Y 2013 Chin. Opt. Lett. 11 111901
[14] Ye P X 2007 Nonlinear Optical Physics (1st Ed.) (Beijing: Peking University Press) pp99-102 (in Chinese) [叶佩弦 2007 非线性光学物理(第1版) (北京:北京大学出版社) 第99-102页]
[15] Zhang Q L, Zhang J, Qiu K S, Zhang D X, Feng B H, Zhang J Y 2012 Chin. Phys. B 21 054213
[16] Han X F, Weng Y X, Wang R, Chen X H, Luo K H, Wu L A, Zhao J 2008 Appl. Phys. Lett. 92 151109
[17] Zhao L, Liao X F, Xiang T, Xiao D 2010 Acta Phys. Sin. 59 1507 (in Chinese) [赵亮, 廖晓峰, 向涛, 肖迪 2010 物理学报 59 1507]
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[1] Hou W, Yu Q F, Lei Z H, Liu X C 2014 Acta Phys. Sin. 63 074208 (in Chinese) [侯旺, 于起峰, 雷志辉, 刘晓春 2014 物理学报 63 074208]
[2] Song C X, Ma K, Qin C, Xiao P 2013 Acta Phys. Sin. 62 040702 (in Chinese) [宋长新, 马克, 秦川, 肖鹏 2013 物理学报 62 040702]
[3] Moon J A, Mahon R, Duncan M D, Reintjes J 1994 Opt. Lett. 19 1234
[4] Vainos N A, Gower M C Opt. Lett. 16 363
[5] Sternklar S, Jackel S, Chomsky D, Zigler A 1990 Opt. Lett. 15 616
[6] Midwinter J E 1968 Appl. Phys. Lett. 12 68
[7] Choi S K, Vasilyev M, Kumar P 1999 Phys. Rev. Lett. 83 1938
[8] Zhang J Y, Shreenath A P, Kimmel M, Zeek E, Trebino R 2003 Opt. Express 11 601
[9] Xiao K, Zhang J, Lin B, Zhang Q L, Zhang D X, Feng B H, Zhang J Y 2014 Opt. Commun. 326 48
[10] Devaux F, Lantz E 1995 J. Opt. Soc. Am. B 12 2245
[11] Lantz E, Devaux F 2008 J. Sel. Top. Quantum Electron 14 635
[12] Vasilyev M, Stelmakh N, Kumar P 2009 J. Mod. Opt. 56 2029
[13] Li X Q, Yang J, Sheng X Z, Zhang J Y, Cui D F, Peng Q J, Xu Z Y 2013 Chin. Opt. Lett. 11 111901
[14] Ye P X 2007 Nonlinear Optical Physics (1st Ed.) (Beijing: Peking University Press) pp99-102 (in Chinese) [叶佩弦 2007 非线性光学物理(第1版) (北京:北京大学出版社) 第99-102页]
[15] Zhang Q L, Zhang J, Qiu K S, Zhang D X, Feng B H, Zhang J Y 2012 Chin. Phys. B 21 054213
[16] Han X F, Weng Y X, Wang R, Chen X H, Luo K H, Wu L A, Zhao J 2008 Appl. Phys. Lett. 92 151109
[17] Zhao L, Liao X F, Xiang T, Xiao D 2010 Acta Phys. Sin. 59 1507 (in Chinese) [赵亮, 廖晓峰, 向涛, 肖迪 2010 物理学报 59 1507]
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