Wideband microwave and millimeter wave filters using photonic spectral filtering
First Claim
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1. An apparatus for filtering a waveform, comprising:
- an electro-optic modulator adapted to accept a first optical signal and an electrical modulating signal;
an optical filter having a plurality of filter bandwidths spaced apart in wavelength and adapted to accept an output of the modulator and to modify at least one of an amplitude or phase of the modulator output within a bandwidth of the electrical signal; and
an opto-electronic converter.
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Abstract
An apparatus and method is disclosed for producing and filtering optical and electrical waveforms. The apparatus includes an electro-optical modulator, an optical filter capable of modulating at least two spectral regions within the bandwidth of the electrical waveform, and an optical-to-electrical converter. The optical filter includes a spatial dispersion means, a spatial modulating means having the capability to substantially independently modulate a characteristic of each of a pair of optical spatial elements.
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Citations
45 Claims
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1. An apparatus for filtering a waveform, comprising:
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an electro-optic modulator adapted to accept a first optical signal and an electrical modulating signal; an optical filter having a plurality of filter bandwidths spaced apart in wavelength and adapted to accept an output of the modulator and to modify at least one of an amplitude or phase of the modulator output within a bandwidth of the electrical signal; and an opto-electronic converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for producing electrical waveforms, comprising:
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an electro-optical modulator configured to accept a first optical signal and an electrical signal; an optical filter having a plurality of substantially independent filter elements spaced apart in wavelength that varies at least one of the amplitude or phase of an optical output signal of the electro-optical modulator as a function of wavelength within the bandwidth of the electrical signal; and an opto-electronic detector. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of filtering an electrical signal, the method comprising:
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providing an electro-optical modulator adapted to accept an optical signal and an electrical modulating signal; optically filtering the modulated optical signal, where the optical filter characteristics include a plurality of filters spaced apart in wavelength within a bandwidth of the electrical modulating signal; and detecting the filtered optical signal. - View Dependent Claims (42, 43)
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44. An apparatus for generating electrical signals, comprising;
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means for modulating an optical signal with an electrical signal; means for modifying an optical spectrum of the modulated optical signal; and means for detecting the modified modulated optical signal.
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45. An apparatus for filtering a waveform, comprising:
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an electro-optic modulator adapted to accept a first optical signal and an electrical modulating signal; an optical filter adapted to accept an output of the modulator and to modify at least one of an amplitude or phase of the modulator output within a bandwidth of the electrical signal; and an opto-electronic converter, wherein the optical filter further comprises; a wavelength dispersive optical element; and a spatial optical modulator having a spatial resolution such that a plurality of independently controllable filter bandwidths are formed within the bandwidth of the electrical signal.
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Specification