Methods and apparatus for power-equalized optical frequency comb generation
First Claim
1. An optical device for generating a frequency comb, the optical device comprising:
- an optical source operable to provide at least two input optical waves characterized by a first input frequency and a second input frequency, respectively, wherein the first input frequency and the second input frequency are separated by a frequency spacing;
a first waveguide comprising a nonlinear optical medium characterized by;
a nonlinear optical response; and
operable to mix the at least two input optical waves to generate a plurality of first optical waves characterized by respective first frequencies separated from each other by the frequency spacing, wherein each input optical wave has a constant amplitude and a constant frequency;
a dispersive element concatenated to the first waveguide, wherein the dispersive element is characterized by a first dispersion characteristics such that the dispersive element is operable to compress the waveforms of the plurality of first optical waves; and
a second waveguide concatenated to the dispersive element, wherein;
the second waveguide comprises a nonlinear optical medium operable to mix the plurality of first optical waves to generate a plurality of second optical waves characterized by respective second frequencies separated from each other by the frequency spacing, after the plurality of first optical waves are compressed by the dispersive element;
the second waveguide has a physical length based on a width of a pulse of the plurality of first optical waves entering the second waveguide; and
the second waveguide is a dispersion-flattened waveguide.
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Abstract
An optical device for generating a frequency comb includes an optical source and a first waveguide comprising a nonlinear optical medium operable to mix at least two input optical waves to generate a plurality of first optical waves. The optical device also includes a second waveguide concatenated to the first waveguide and characterized by a first dispersion characteristics and operable to compress the waveforms of the plurality of first optical waves and to reduce a frequency chirp introduced by the first waveguide. The optical device additionally includes a third waveguide concatenated to the second waveguide. The third waveguide comprises a nonlinear optical medium and is operable to mix the plurality of first optical waves to generate a plurality of second optical waves and to increase a total number of second optical waves with respect to a total number of first optical waves.
15 Citations
20 Claims
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1. An optical device for generating a frequency comb, the optical device comprising:
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an optical source operable to provide at least two input optical waves characterized by a first input frequency and a second input frequency, respectively, wherein the first input frequency and the second input frequency are separated by a frequency spacing; a first waveguide comprising a nonlinear optical medium characterized by; a nonlinear optical response; and operable to mix the at least two input optical waves to generate a plurality of first optical waves characterized by respective first frequencies separated from each other by the frequency spacing, wherein each input optical wave has a constant amplitude and a constant frequency; a dispersive element concatenated to the first waveguide, wherein the dispersive element is characterized by a first dispersion characteristics such that the dispersive element is operable to compress the waveforms of the plurality of first optical waves; and a second waveguide concatenated to the dispersive element, wherein; the second waveguide comprises a nonlinear optical medium operable to mix the plurality of first optical waves to generate a plurality of second optical waves characterized by respective second frequencies separated from each other by the frequency spacing, after the plurality of first optical waves are compressed by the dispersive element; the second waveguide has a physical length based on a width of a pulse of the plurality of first optical waves entering the second waveguide; and the second waveguide is a dispersion-flattened waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of generating a frequency comb comprising:
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providing at least two input optical waves characterized by respective input frequencies separated from each other by a frequency spacing; mixing, via a first waveguide, the at least two input optical waves to provide a plurality of first optical waves characterized by respective first frequencies separated from each other by the frequency spacing, wherein each input optical wave has a constant amplitude and a constant frequency compressing, via a dispersive element concatenated to the first waveguide, the plurality of first optical waves to provide a plurality of first compressed optical waves; and mixing, via a second waveguide concatenated to the dispersive element, the plurality of first optical waves to generate a plurality of second optical waves characterized by respective second frequencies separated from each other by the frequency spacing, after the plurality of first optical waves are compressed by the dispersive element, wherein; the second waveguide is a dispersion-flattened waveguide; and the second waveguide has a physical length based on a width of a pulse of the plurality of first optical waves entering the second waveguide. - View Dependent Claims (12, 13, 14, 15)
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16. An optical device for generating a frequency comb, the optical device comprising:
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an optical source operable to provide at least two input optical waves characterized by a first input frequency and a second input frequency, respectively, wherein the first input frequency and the second input frequency are separated by a frequency spacing; and a first waveguide comprising a nonlinear optical medium, wherein; the nonlinear optical medium is characterized by a nonlinear optical response; and the nonlinear optical medium is operable to mix the at least two input optical waves to generate a plurality of first optical waves characterized by respective first frequencies separated from each other by the frequency spacing, wherein each input optical wave has a constant amplitude and a constant frequency; a dispersive element concatenated to the first waveguide; and a second waveguide concatenated to the dispersive element, wherein; the second waveguide comprises a nonlinear optical medium operable to mix the plurality of first optical waves to generate a plurality of second optical waves characterized by respective second frequencies separated from each other by the frequency spacing, after the plurality of first optical waves pass through the dispersive element; the second waveguide has a physical length based on a width of a pulse of the plurality of first optical waves entering the second waveguide; and the second waveguide is a dispersion-flattened waveguide. - View Dependent Claims (17, 18, 19, 20)
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Specification