Laser plasma chamber
US4817107A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1985 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/09716
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention is described as embodied in a plasma chamber for use in gas lasers. A sealed nitrogen gas laser is provided with a pair of capacitance coupled, symmetrically positioned pre-ionizer elements in the form of a pair of insulated wire loops extending from one electrode to the region adjacent the other electrode. All parts of the plasma chamber accessible to ultraviolet radiation or ionized gases and are formed entirely of inorganic materials, such as ceramic and quartz, eliminating previously unrecognized difficulties resulting from the use of plastic or other organic materials in the chamber construction, thus making possible a sealed low-power nitrogen laser having a relatively long life. The pre-ionizer elements, which may be used in lasers of other types, both sealed and unsealed, produce a pre-ionization current that is limited to the capacitance displacement current, and are symmetrically positioned with respect to the adjacent negative electrode so that the laser beam is not distorted by the pre-ionization currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.