Super structure grating and tunable laser
US10931085B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2019 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Oct 17, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A super structure grating spatially performs amplitude and phase modulation on a uniform grating using a modulation function to generate a comb reflection spectrum. (N+1) modulation function discrete values are obtained after discretization processing is performed on the modulation function using N thresholds. Each of the (N+1) modulation function discrete values corresponds to one section of optical waveguide whose refractive index is uniform or corresponds to one section of the uniform grating. A reflectivity and a full width half maximum (FWHM) of a reflection peak of the super structure grating is adjusted based on a relationship of a ratio of a length of an optical waveguide corresponding to at least one of the (N+1) modulation function discrete values to a total grating length of the super structure grating, and based on the total grating length of the super structure grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.