On-chip optical reference cavity exhibiting reduced resonance center frequency fluctuations
US8848760B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | May 6, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/026
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical apparatus comprises a waveguide substrate and an optical reference cavity. The optical reference cavity comprises an optical waveguide formed on the waveguide substrate and arranged to form a closed loop greater than or about equal to 10 cm in length. The RMS resonance frequency fluctuation is less than or about equal to 100 Hz. The Q-factor can be greater than or about equal to 108. The optical waveguide can exhibit optical loss less than or about equal to 0.2 dB/m for propagation of an optical signal along the optical waveguide. The closed loop path can comprise two or more linked spirals greater than or about equal to 1 meter in length and can occupy an area on the waveguide substrate less than or about equal to 5 cm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.