Abstract:

An analysis of the major noise sources of PIN optoelectronic diode is made.Bias circuit and filter circuit are designed.Electromagnetic shielding is reasonably used with the effect exerted by high frequency in mind.Experiment shows that the noise of the system is significantly decreased and the SNR is improved by the use of the bias circuit and filter circuit.It enjoys great possibility for SAL to be applied in practical application.

Key words: synthetic aperture ladar(SAL);weak signal detection;analysis of noise