Synthesis of optical dispersion compensators and methods using a series of GT cavities
AssigneeAvanex Corporation
InventorShudong Wu
Life of this patent
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Abstract
The invention provides a dispersion compensation system and method formed by cascading a series of GT cavities with three setting parameters, reflectivity, resonant wavelength, and free-spectral-range. In one aspect of the invention, the GT cavities can synthesize any shape of combined dispersion compensation, including positive, negative, slope dispersion compensation. In another aspect of the invention, the GT cavities are tunable or dynamic to accommodate various types of dispersion compensation. Advantageously, the present invention provides an effective cost solution for a more precise dispersion compensation tuning.
Claims13
A dispersion compensation synthesizer, comprising:
- a first GT cavity for dispersion compensation at a first rate;
- a second GT cavity for dispersion compensation at a second rate, coupled to the first GT cavity, the combination of the first and second GT cavities compensating for different chromatic dispersion, the second rate of the second GT cavity providing a finer dispersion compensation than the first rate of the first GT cavity.
A method for dispersion compensation synthesis, comprising:
- providing a first dispersion compensation function, the first dispersion compensation function comprising parameters of a first reflectivity, a first resonance wavelength, and a first free-spectral-range;
- and
- providing a second dispersion compensation function, the second dispersion compensation function comprising parameters of a second reflectivity, a second resonance wavelength, and a second free-spectral-range, the first and second dispersion compensation functions forming a tunable dispersion compensation for an optical signal.
A method for dispersion compensator synthesis, comprising:
- approximating one or more GT cavities to realize a requisite dispersion compensation, each GT cavity including a mirror reflectivity parameter and a wavelength setting parameter for use to compute the desirable number of cavities.
- extracting a mirror reflectivity parameter from each GT cavity;
- and
- extracting a wavelength setting parameter from each GT cavity, wherein the combination of the mirror reflectivity parameter and the wavelength setting are computed for operation with a particular dispersion compensation function.
Dependencies are inferred from the claim text.