Design of receiving sensitivity test system  for pulse laser range finder  based on integrating sphere

Fei Xie; Guofeng Zheng; Baolin Du; Peng Zhang

doi:10.1117/12.2565432

17 April 2020 Design of receiving sensitivity test system for pulse laser range finder based on integrating sphere

Fei Xie, Guofeng Zheng, Baolin Du, Peng Zhang

Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 114558F (2020) https://doi.org/10.1117/12.2565432
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

The maximum ranging distance is a key technical indicator of the pulse laser range finder. It is generally obtained by testing the laser receiving sensitivity of the pulse laser range finder in the laboratory.The existing laser receiving sensitivity test is mainly realized by means of laser analog radiation source and collimating optical system.The laser radiation simulator generally uses a semiconductor laser to transmit the analog laser receiving signal to the focal plane of the collimating optical system through fiber coupling, and then radiates to the receiving aperture of the pulse laser range finder through the collimating optical system. Adjust the intensity of the laser to simulate the energy of the radiation source, and complete the test of the minimum detectable energy, that is, the laser receiving sensitivity.In the actual use process, it is found that the time stability deviation of the radiation power of the semiconductor laser in low-power operation can reach 20%, which is difficult to meet the requirements of use, and after the fiber coupling, the collimation of the collimating optical system, the radiation uniformity is difficult to fulfil requirements.Based on this, this paper designs a pulse laser range finder receiving sensitivity test equipment based on integrating sphere. The system uses the traditional laser radiation analog source plus attenuator to stabilize the laser radiation source.In the case of a pulsed laser range finder as a sensor in combination with a television or infrared sensor, a tungsten halogen lamp is added inside the integrating sphere to provide infrared or television target simulation,then the optical axis of the pulsed laser range finder and collimating optics can be quickly aligned.

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Fei Xie, Guofeng Zheng, Baolin Du, and Peng Zhang "Design of receiving sensitivity test system for pulse laser range finder based on integrating sphere", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 114558F (17 April 2020); https://doi.org/10.1117/12.2565432

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KEYWORDS

Pulsed laser operation

Laser range finders

Integrating spheres

Fiber lasers

Optical simulations

Semiconductor lasers

Airborne laser technology

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