Abstract: A system includes a waveform generator configured to generate a pulsed laser beam at a first wavelength. The system also includes at least one splitter configured to split the laser beam into multiple beams at the first wavelength. The system also includes at least one wavelength shifter configured to shift at least one of the multiple beams to another wavelength. The system also includes at least one combiner configured to combine the multiple beams into a multi-wavelength beam in which multiple wavelengths are co-aligned and propagating parallel to each other. The system also includes at least one nonlinear crystal configured to receive the multi-wavelength beam and generate multiple co-propagating beams using nonlinear wavelength conversion.

Abstract: A laser radar (LADAR) system includes a laser transmitter configured to (i) emit laser pulses at a first wavelength and (ii) emit amplified spontaneous emission (ASE) in a spectrum concentrated around the first wavelength. The LADAR system also includes a non-linear converter configured to (i) convert the laser pulses to a second wavelength and (ii) allow the ASE to remain substantially unconverted in the spectrum concentrated around the first wavelength. The LADAR system further includes a receiver configured to receive and detect reflected laser pulses, where the reflected laser pulses include the laser pulses at the second wavelength after reflection from at least one target. In addition, the LADAR system includes a spectral filter configured to (i) allow passage of the laser pulses or the reflected laser pulses and (ii) substantially filter the ASE and prevent the filtered ASE from being detected by the receiver.

Abstract: A system includes a master oscillator configured to generate a low-power optical beam. The system also includes a planar waveguide (PWG) amplifier configured to amplify the low-power beam into a high-power output optical beam, where the PWG amplifier has a larger dimension in an unguided direction and a smaller dimension in a transverse guided direction. The system further includes an adaptive optic configured to pre-distort the low-power optical beam substantially along a single dimension prior to injection of the low-power optical beam into the PWG amplifier in order to compensate for thermal-based distortions created by the PWG amplifier. The single dimension represents the unguided direction. In addition, the system includes a feedback loop configured to control the adaptive optic.

Abstract: A laser radar (LADAR) system includes a laser transmitter configured to (i) emit laser pulses at a first wavelength and (ii) emit amplified spontaneous emission (ASE) in a spectrum concentrated around the first wavelength. The LADAR system also includes a non-linear converter configured to (i) convert the laser pulses to a second wavelength and (ii) allow the ASE to remain substantially unconverted in the spectrum concentrated around the first wavelength. The LADAR system further includes a receiver configured to receive and detect reflected laser pulses, where the reflected laser pulses include the laser pulses at the second wavelength after reflection from at least one target. In addition, the LADAR system includes a spectral filter configured to (i) allow passage of the laser pulses or the reflected laser pulses and (ii) substantially filter the ASE and prevent the filtered ASE from being detected by the receiver.

Abstract: A system includes a master oscillator configured to generate a low-power optical beam. The system also includes a planar waveguide (PWG) amplifier configured to amplify the low-power beam into a high-power output optical beam, where the PWG amplifier has a larger dimension in an unguided direction and a smaller dimension in a transverse guided direction. The system further includes an adaptive optic configured to pre-distort the low-power optical beam substantially along a single dimension prior to injection of the low-power optical beam into the PWG amplifier in order to compensate for thermal-based distortions created by the PWG amplifier. The single dimension represents the unguided direction. In addition, the system includes a feedback loop configured to control the adaptive optic.

Abstract: A laser radar (LADAR) system includes a laser transmitter configured to emit laser pulses at a first wavelength, a non-linear converter configured to convert the laser pulses to a second wavelength prior to spectral filtering of amplified spontaneous emission (ASE) that is emitted from the laser transmitter in a spectrum concentrated around the first wavelength, and a spectral filter configured to substantially filter the ASE and allow the laser pulses at the second wavelength to pass.

Abstract: A method for computing a cross-correlation between a first sequence and a second sequence includes: generating a first index vector based on the first sequence, the first index vector including a plurality of first elements, the first index vector excluding indices of zero valued elements of the first sequence; generating a second index vector based on the second sequence, the second index vector including a plurality of second elements, the second index vector excluding indices of zero valued elements of the second sequence; computing, on a processor, a plurality of pairwise differences between each of first elements of the first index vector and each of the second elements of the second index vector; and binning, on the processor, the plurality of pairwise differences to generate the cross-correlation of the first sequence and the second sequence.

Abstract: A system for generating an optical signal having a preselected waveform includes: a laser source; a first waveform generator configured to apply a first signal to the laser source to create a laser output; an intensity modulator configured to receive the laser output; a second waveform generator configured to apply a second signal to the intensity modulator, the intensity modulator being configured to generate a pre-distorted laser signal based on the second signal and the laser output.

Abstract: A method for computing a cross-correlation between a first sequence and a second sequence includes: generating a first index vector based on the first sequence, the first index vector including a plurality of first elements, the first index vector excluding indices of zero valued elements of the first sequence; generating a second index vector based on the second sequence, the second index vector including a plurality of second elements, the second index vector excluding indices of zero valued elements of the second sequence; computing, on a processor, a plurality of pairwise differences between each of first elements of the first index vector and each of the second elements of the second index vector; and binning, on the processor, the plurality of pairwise differences to generate the cross-correlation of the first sequence and the second sequence.

Abstract: A system for generating an optical signal having a preselected waveform includes: a laser source; a first waveform generator configured to apply a first signal to the laser source to create a laser output; an intensity modulator configured to receive the laser output; a second waveform generator configured to apply a second signal to the intensity modulator, the intensity modulator being configured to generate a pre-distorted laser signal based on the second signal and the laser output.

Abstract: A laser radar (LADAR) system includes a laser transmitter configured to emit laser pulses at a first wavelength, a non-linear converter configured to convert the laser pulses to a second wavelength prior to spectral filtering of amplified spontaneous emission (ASE) that is emitted from the laser transmitter in a spectrum concentrated around the first wavelength, and a spectral filter configured to substantially filter the ASE and allow the laser pulses at the second wavelength to pass.