摘要:
A photonic signal processor providing finite impulse response filtering of an external input signal, the processor including: a photonic signal input having a predetermined wavelength range, a Bragg grating structure interconnected to the photonic signal input and having a series of localized modifications to the periodicity of the grating structure so as to provide a predetermined transmission output window within the stopband of the Bragg grating structure and predetermined wavelength range; a modulator interconnected to the grating structure for modulating the output from the grating structure in accordance with the external signal input; a delay structure for providing a wavelength variable delay to the output from the modulator; an intensity detector interconnected to the delay structure for determining and outputting the intensity of the delay structure output.
摘要:
A photonic signal processor providing finite impulse response filtering of an external input signal, the processor including: a photonic signal input having a predetermined wavelength range, a Bragg grating structure interconnected to the photonic signal input and having a series of localised modifications to the periodicity of the grating structure so as to provide a predetermined transmission output window within the stopband of the Bragg grating structure and predetermined wavelength range; a modulator interconnected to the grating structure for modulating the output from the grating structure in accordance with the external signal input; a delay structure for providing a wavelength variable delay to the output from the modulator; an intensity detector interconnected to the delay structure for determining and outputting the intensity of the delay structure output.
摘要:
A beam forming antenna device emitting a predetermined free space energy pattern, the device including: an optical signal source having predetermined wavelength characteristics; an optical modulator for modulating predetermined wavelengths of the optical signal source to produce a modulated signal source including frequency sideband components; a dispersion element for spreading and projecting the modulated signal source in a wavelength dependant manner onto a relative phase manipulation element; a relative phase manipulation element manipulating the relative phase of the modulated signal source in a predetermined manner, said phase manipulation element further amplitude modulating predetermined wavelengths of said modulated signal source and outputting a predetermined groupings of wavelengths on a series of output ports; optical to electrical conversion means converting the amplitude of the optical signal on said output ports to a corresponding electrical signal; and a series of irradiating antenna elements connected to each corresponding electrical signal for radiating a corresponding free space signal to substantially produce said predetermined free space energy pattern.