Yang Chenghua, Zhang Yong, Zhao Yuan. Enhancement of heterodyne efficiency of heterodyne LADAR system with APD array detector based on array lighting[J]. Infrared and Laser Engineering, 2014, 43(10): 3269-3275.
| Citation:
|
Yang Chenghua, Zhang Yong, Zhao Yuan. Enhancement of heterodyne efficiency of heterodyne LADAR system with APD array detector based on array lighting[J]. Infrared and Laser Engineering, 2014, 43(10): 3269-3275.
|
Enhancement of heterodyne efficiency of heterodyne LADAR system with APD array detector based on array lighting
- Received Date: 2014-02-05
- Rev Recd Date:
2014-03-10
- Publish Date:
2014-10-25
-
Abstract
At the moment non-scanned imaging LADAR system whose advantage is rapidly imaging cannot work beyond a relatively short operating distance due to the restriction of laser power and attenuation of the signal. Therefore designing a new-type non-scanned heterodyne LADAR system with APD array detector is a imperative solution to this problem. The design of lighting systems is the concentration since different heterodyne efficiencies correspond to different optical systems and then decide the performance of the LADAR system directly. In this paper, it was discussed that the heterodyne efficiency of the system using a single expanded oscillator laser beam lighting system with a single collector lens stays only at 10-5 level which is far away from practical applications. Then, as a improvement design, array lighting theory was adopted with a micro lens array collector device played before the detector array, the maximum heterodyne efficiency of which reached 0.82 by calculation. The conclusion drawn in this paper proves the feasibility of array lighting heterodyne LADAR system theoretically and form the foundation for further research on heterodyne LADAR system with APD array detector.
-
References
|
[1]
|
|
|
[2]
|
Barry L Stann, Ahmed Abou-Auf, Keith Aliberti, et al. Research progress on a focal plane array ladar system using a laser diode transmitter and FM/CW radar principles[C]//Proceedings of SPIE, 2002, 4723: 19-30. |
|
[3]
|
Stann B L, Ruff W C, Sztankay Z G. Intensity modulated diode laser radar using frequency modulation/continuous-wave ranging techniques[J]. Opt Eng, 1996, 35(11): 3271-3272. |
|
[4]
|
|
|
[5]
|
|
|
[6]
|
Wu Fan, Zhang Yong, He Jiang, et al. Improved range-gating 3D imaging laser radar[J]. Infrared and Laser Engineering, 2011, 40(12): 2388-2392. (in Chinese) |
|
[7]
|
|
|
[8]
|
Linda Mathieu, Michel Doucet, Pascal Bourqul, et al. A global review of optronic synthetic aperture radar/ladar processing[C]//Proceedings of SPIE, 2013, 8714(XVII):871416. |
|
[9]
|
Liu Bingyi, Feng Changzhong, Chen Yubao, et al. Synchronous obserbation of wind profiles with mobile Doppler lidar[J]. Chinese Journal of Quantum Electronics, 2013, 30(1): 52-56. (in Chinese) |
|
[10]
|
|
|
[11]
|
|
|
[12]
|
Zhao Yuan, Xu Yuannan, Jin Chenfei, et al. Theoretical analysis on range accuracy of gain-modulated scannerless lidar[J]. Infrared and Laser Engineering, 2009, 38(2): 313-317. (in Chinese) |
|
[13]
|
|
|
[14]
|
Li Fan, Wu Shuangyang, Yang Hongguo, et al. Multi-element array detecting technology of ladar[J]. Infrared and Laser Engineering, 2009, 38(2): 295-299. (in Chinese) |
|
[15]
|
Cohen Steven C. Heterodyne detection: phase front alignment, beam spot size, and detector uniformity[J]. Applied Optics, 1975, 14: 402-408. |
|
[16]
|
|
|
[17]
|
Wang Qi, Wang Chunhui, Shang Tieliang. Heterodyne efficiency of coherent detection with Guassian local-oscillator and Airy spot signal[J]. Chinese Journal of Lasers, 2003, 30(S1): 183-186. (in Chinese) |
-
-
Proportional views
-
DownLoad: