Rotational transition based clock, rotational spectroscopy cell, and method of making same
US9529334B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2015 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Mar 31, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Described examples include a millimeter wave atomic clock apparatus, chip scale vapor cell, and fabrication method in which a low pressure dipolar molecule gas is provided in a sealed cavity with a conductive interior surface forming a waveguide. Non-conductive apertures provide electromagnetic entrance to, and exit from, the cavity. Conductive coupling structures formed on an outer surface of the vapor cell near the respective non-conductive apertures couple an electromagnetic field to the interior of the cavity for interrogating the vapor cell using a transceiver circuit at a frequency that maximizes the rotational transition absorption of the dipolar molecule gas in the cavity to provide a reference clock signal for atomic clock or other applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.