论文信息 - Detection efficiency of coherent optical radar.

Detection efficiency of coherent optical radar.

Using the Huygens-Fresnel principle, the detection efficiency of a coherent optical radar is formulated. This formulation includes the effect of misalignment between the signal field and the local oscillator field. In the far-field case, the detection efficiency of a diffuse target is approximately half that of a glint target when the transmitter and the receiver are of the same size and the misalignment angle is small. The effect of finite detector size on the detection efficiency is also studied. For a uniform local oscillator field mixed with a signal field at the detector surface, the optimum angular detector size is ~2λ/d2, where d2 is the receiver aperture size. This conclusion is valid for both diffuse and glint targets.

J. Y. Wang | J Y Wang

[1] K. Tanaka,et al. Diffraction of a Gaussian beam through a finite aperture lens and the resulting heterodyne efficiency. , 1981, Applied optics.

[2] K Tanaka,et al. Signal-to-noise ratio in optical heterodyne detection for Gaussian fields. , 1978, Applied optics.

[3] S F Clifford,et al. Monostatic heterodyne lidar performance: the effect of the turbulent atmosphere. , 1981, Applied optics.

[4] J. Y. Wang,et al. Heterodyne laser radar SNR from a diffuse target containing multiple glints. , 1982, Applied optics.

[5] S C Cohen,et al. Heterodyne detection: phase front alignment, beam spot size, and detector uniformity. , 1975, Applied optics.

[6] D. Fink,et al. Coherent Detection Signal-to-Noise. , 1975, Applied optics.

[7] J. Kerr,et al. Statistics of speckle propagation through the turbulent atmosphere , 1976 .