Tunable optical filter
AssigneeLightcross, Inc.
InventorsDazeng Feng, Wenhua Lin
Life of this patent
Estimating the term…
Abstract
An optical filter system is disclosed. The optical filter system includes a first filter configured to output light signals having wavelengths falling within a plurality of periodically spaced wavelength bands. A second filter in optical communication with the first filter and being configured to output light signals having wavelengths falling within a plurality of periodically spaced bands. The period of the bands associated with the first filter is different than the period of the bands associated with the second filter.
Claims42
An optical filter system, comprising:
- a first filter having a plurality of periodically spaced pass bands separated by blocked wavelength bands;
- and
- a second filter configured to receive light signals output by the first filter and having a plurality of periodically spaced pass bands, the period of the pass bands associated with the first filter being different than the period of the pass bands associated with the second filter.
An optical filter system, comprising:
- a first filter configured to output light signals having wavelengths falling within a plurality of periodically spaced pass bands separated by blocked wavelength bands;
- and
- a second filter configured to receive the light signals output by the first filter and to output light signals having wavelengths falling within a plurality of periodically spaced pass bands separated by blocked wavelength bands, the period of the pass bands associated with the first filter being different than the period of the pass bands associated with the second filter and at least one of the first filter or the second filter being configured to shift the selection of wavelengths in the periodically spaced bands across a spectrum of wavelengths.
A method of operating an optical filter system, comprising:
- selecting a target wavelength to be produced by an optical filter system having a first filter in optical communication with a second filter, the first filter having a plurality of periodically spaced pass bands separated by blocked wavelength bands and the second filter configured to output light signals having wavelengths that overlap with the target wavelength;
- and
- tuning the first filter such that a pass band of the first filter overlaps with the target wavelength.
A method of operating an optical filter systems comprising:
- selecting a target wavelength to be produced by the optical filter system having a first filter in optical communication with a second filter;
- the first filter having a plurality of periodically spaced pass bands separated by blocked wavelength bands and the second filter having a plurality of periodically spaced pass bands separated by blocked wavelength bands, the period of the pass bonds associated with the first filter being different than the period of the pass bands associated with the second filter;
- and
- tuning the first filter such that a pass band of the first filter overlaps with the target wavelength, wherein tuning the first filter includes shifting the selection of wavelengths included in the pass bands of the first filter.
Dependencies are inferred from the claim text.