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�������պ����ѧѧ�� 2008, Vol. 34 Issue (05) :596-599    DOI:
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���ڷ�, �Ŵ���, ������, ����ǿ*
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All-fiber laser radar at 1.55��μm for speed measurement
Ma Zongfeng, Zhang Chunxi, Wang Xiaxiao, Wang Jiqiang*
School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ ��Դ�ͳ��ɼ����״�����ʵ�ֱ�������źŹⲨǰƥ�������,�����һ�ֻ��ڹ��˵��𴰿�1.55��μm��ȫ���˲��ټ����״�.ϵͳ��ȫ������������������·�ṹ,ƫ���޹ع��˻�������Cassegrain����Զ������շ����ù�ѧ����.�����˼����״�����巽����ϵͳ���,���Խ��ջ��Ĺ��Ƶ�������뵥ģ���˵���ϡ��źż������ݲɼ�����ȼ�������������.ͨ��ʵ��˵��,ȫ���˲��ټ����״�Կռ����������нϺõĿ���������,����˸������Ŀɼ��Ⱥ��״�ϵͳ������,���õ��ٶȷֱ�������0.5��mm/s,��������Զ�С��0.1��.
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Abstract�� Strict optical alignment is essential for conventional coherent laser radar to match the local oscillator (LO) and signal modes. The scheme and system design of simple, continuous-wave (CW) coherent laser radar at 1.55 μm for speed measurement were presented. The system was based on all fiber instruments. A polarization-independent fiber-optic circulator and a Cassegrain telescope were used as the monostatic optical antenna. The fiber mixing technique of the receiver, the coupling efficiency between antenna and single-mode fiber (SMF) for spatial light, signal detection, digital data acquisition and processing were discussed. The experimental results indicate that the laser radar system has good robustness to random fluctuation noise of spatial light. In addition, the interference fringe visibility and the performance of the laser radar system are enhanced greatly. The speed resolution is less than 0.5��mm/s, and the output nonlinearity of this laser radar is less than 0.1��.
Keywords�� laser radar   single-mode fiber   point spread function   spectral analysis     
Received 2007-05-14;
About author: ���ڷ�(1980-), ��, ɽ��������, ��ʿ��, mzf706@163.com.
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���ڷ�, �Ŵ���, ������, ����ǿ.����1.55��μm��ȫ���˲��ټ����״�[J]  �������պ����ѧѧ��, 2008,V34(05): 596-599
Ma Zongfeng, Zhang Chunxi, Wang Xiaxiao, Wang Jiqiang.All-fiber laser radar at 1.55��μm for speed measurement[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(05): 596-599
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I05/596
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