Quantum interference detection of optical frequency comb offset frequency
US10931370B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2018 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | May 10, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1112
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method is presented for determining an offset frequency of a frequency comb. The method includes: generating a beam of light with a waveform that repeats regularly in the time domain and exhibits a frequency comb in the frequency domain; directing the beam of light towards a point of incidence on a material; and detecting oscillation of a photocurrent in the material that is caused by the beam of light. Of note, the beam of light has an optical bandwidth that includes light propagating at a first frequency and at a second frequency, where the first frequency is less than the second frequency and the ratio of the second frequency to the first frequency is n:m, where n=m+i, m is an integer greater than one, and n and i are positive integers. Additionally, the material has a band gap and the band gap is not more than n times the first frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.