Variable dual-directional thermal compensator for arrayed waveguide grating (AWG) modules
US11619780B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2019 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | May 2, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4215
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A thermal compensator, for use in connection with arrayed waveguide grating (AWG) modules which are, in turn, utilized in conjunction with wavelength multiplexing and de-multiplexing within optical networks, is disclosed. The thermal compensator comprises a bow-shaped frame member, a central bar member, and a screw. The bow-shaped frame member is characterized by a higher or great coefficient of thermal expansion (CTE) than that of the central bar member such that the bow-shaped frame member can expand and elongate at a greater rate than can the central bar member under hot temperature conditions, however, under cold temperature conditions, the rate of contraction of the bow-shaped member is effectively retarded by the slower rate of contraction of the central bar member. The bow-shaped frame member is adapted to be attached to a movable section of an athermal arrayed waveguide grating (AAWG) module such that the expansion and contraction movements of the bow-shaped member influence the movement of a movable section of the athermal arrayed waveguide grating (AAWG) module in order to maintain the proper focus of the athermal arrayed waveguide grating (AAWG) module across disparate t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.