Semiconductor laser pulse compression radar system
First Claim
1. A radar system for detecting a target, comprising:
- a semiconductor laser for generating light;
means, connected to said semiconductor laser for pulsing and modulating said light to form light pulses having a predetermined pulse width and amplitude;
means for launching said light pulses towards the target;
means for receiving portions of said light pulses reflected by the target;
means, connected to said receiving means, for demodulating said received portions of said light pulses such that said pulses are compressed and have a pulse width less than said predetermined pulse width and an amplitude greater than the amplitude of the received pulses; and
means, connected to said demodulating means and responsive to said demodulated portions, for producing an output signal.
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Accused Products
Abstract
A semiconductor laser pulse compression radar system utilizes a semiconductor laser source 16 for generating light for transmission towards a target 27. A modulator 15 pulses and modulates the light according to a preselected code, and a transmitter telescope 18 launches the light. Portions of the pulsed light reflected by the target 27 are gathered by a receiver telescope 28 and are converted to electrical current pulses by an avalanche photodiode 30. The pulses of electrical current are demodulated by demodulator 31, which includes a pulse compression filter 35 which has the conjugate time-frequency characteristic of the modulator. A display/counter 36 displays the range of the target from the system.
22 Citations
22 Claims
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1. A radar system for detecting a target, comprising:
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a semiconductor laser for generating light; means, connected to said semiconductor laser for pulsing and modulating said light to form light pulses having a predetermined pulse width and amplitude; means for launching said light pulses towards the target; means for receiving portions of said light pulses reflected by the target; means, connected to said receiving means, for demodulating said received portions of said light pulses such that said pulses are compressed and have a pulse width less than said predetermined pulse width and an amplitude greater than the amplitude of the received pulses; and means, connected to said demodulating means and responsive to said demodulated portions, for producing an output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification