| 摘要 |
The present invention relates to a pulsed coherent laser radar system comprising a single-frequency transmitter laser (1) which generates laser pulses. The laser pulses pass a beam splitter (2) which splits the energy of the pulses and conducts a first part to the output unit (12, 13) of the system for transmitting laser radar pulses. A second part is conducted to a first optical fibre (4) and further to an input of a first fibre-optic coupler (5), which connects part of the energy of each pulse to a fibre-optic ring, which comprises a second fibre-optic coupler (6). An output (A3) of the second coupler conducts part of the energy of each pulse remaining in the fibre-optic ring while a second output (A4) discharges pulses in a pulse train with a pulse frequency dependent on the time of a pulse passing round in the fibre-optic ring. The pulse train is combined in a detection device with return pulses from targets, frequency information about the return pulses being recovered. |
