Gas cell based on hollow-core photonic crystal fiber and its application for the detection of greenhouse gas: nitrous oxide
US10288558B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2017 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Mar 23, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/088
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Unique gas cell constructions based on a hollow-core photonic crystal fiber are used, for example, inside a fiber ring laser cavity as an intracavity gas cell. In one embodiment, two simple terminal blocks are coupled to opposite ends of the hollow-core photonic crystal fiber. Each block features a main through-bore with an optical window at one end and an optical fiber chuck fitted at the other end, while a transverse bore intersects the main bore and features a gas fitting for connection to a gas source or vacuum pump. In another embodiment, the hollow-core photonic crystal fiber is contained within an enclosure whose exterior walls are fitted with optical windows and gas ports. Inside the enclosure, fiber clamps supports the ends of the hollow-core photonic crystal fiber at positions adjacent to an in alignment with the optical windows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.