Patent ID: 9712250
Date: 2017-07-18
CPC Classifications: G01S,H04B

Claim:
1. A system generating a frequency modulated laser waveform, the system comprising: a laser capable of producing a laser output signal having a single frequency and a linewidth centered at ω an electro-optical modulator coupled to the laser and configured to receive the laser output signal from the laser; a electric ramp generator including a voltage controlled oscillator controlled by a digital micro-controller, the electric ramp generator coupled to the electro-optical modulator and capable of generating a ramp having a frequency chirp with a bandwidth B over a time period T, and a modulation offset frequency ω a band-pass optical filter coupled to the electro-optical modulator and capable of receiving the modulated waveform and filtering out the harmonic frequencies created by the electro-optical modulator during modulation of the laser output signal and reflecting a filtered modulated waveform; and an optical circulator separate from the band-pass optical filter and interconnecting the electric ramp generator and the band-pass optical filter, the optical circulator being configured to transmit the filtered modulated waveform from the band-pass filter to a target; wherein the band-pass optical filter includes a bandwidth BW greater than the modulation bandwidth B and less than the modulation offset frequency ω