Proportion adjustable single-photon beam splitter based on cold atom storage
US11894159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2020 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Nov 7, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A proportion adjustable single-photon beam splitter based on cold atom storage includes a two-dimensional magneto-optical trap for receiving a first optical signal to be split; and a coupling beam. The coupling beam is incident at a certain angle with the first optical signal to the two-dimensional magneto-optical trap. The storage time of the two-dimensional magneto-optical trap 1 can be adjusted by controlling the switching time of the coupling beam, and then adjusting a proportion of a photon number of a storage part and a photon number of a leakage part of the first optical signal. A splitting proportion may also be adjusted by controlling an optical depth of the alkali metal atomic group trapped in the two-dimensional magneto-optical trap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.