US4143336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xenon bromide (xebr) excimer laser
Assignee: United States Department of the Navy
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Filing: 1976-03-03
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Granted: 1979-03-06
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Expires: 1996-03-03
Abstract
Abstract A Xenon Bromide (XeBr) excimer laser is made by electron beam excitation over a range of from 10-3000 torr xenon with 0.5-4% Br 2 . Xe* generated by a high-energy electron beam reacts with Br 2 to produce XeBr* which undergoes a bound-free transition resulting in stimulated emission on the transition XeBr*→Xe + Br + hv (230-360 nm) where* represents a low lying electronically excited state.
Inventors
- 👤 Stuart K. Searles
- 👤 George A. Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/09707; H01S3/14; H01S3/22; H01S3/223; H01S3/225
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A method of producing stiumlated emission at 281.8 nm from XeBr which comprises: mixing Xe gas with a Br 2 gas; admitting the mixed gases into a laser cavity at a pressure sufficient to produce stimulated emission; exciting said mixed gas by an electron beam normal therewith to produce stimulated emission on the transition XeBr* → Xe + Br + hv (281.8 nm).
Claim 2
Independent Claim
63 words
A method of producing stiumlated emission at 281.8 nm from XeBr which comprises: mixing Xe gas with a Br 2 gas; admitting the mixed gases into a laser cavity at a pressure sufficient to produce stimulated emission; exciting said mixed gas by an electron beam normal therewith to produce stimulated emission on the transition XeBr* → Xe + Br + hv (281.8 nm).
Claim 3
Dependent Claim
13 words
A method as claimed in claim 1, wherein; said Xe is 99.995% pure.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 1, wherein: said gas mixture comprises from 0.5-4% Br 2 .
Claim 5
Dependent Claim
21 words
A method as claimed in claim 3, wherein; the pressure of said mixed gases in said cavity is from 10-3000 torr.
Claim 6
Dependent Claim
49 words
A method as claimed in claim 3, wherein; prior to mixing said gases; said Xe gas is condensed into a cold finger from a supply tank, and; said Br 2 is placed into a separate cold finger and thoroughly degassed; whereby the temperature of said gases are controlled cryogenically.
Claim 7
Dependent Claim
57 words
A Xenon Bromide excimer laser which comprises: an electron excitation means for generating a high energy electron beam; a laser cavity with its optical axis transverse to the electron beam generated by said electron excitation means; a gaseous mixture of Xe and Br 2 in said laser cavity; said Br 2 forming from 0.1-4% of said mixture.
Claim 8
Dependent Claim
57 words
A Xenon Bromide excimer laser which comprises: an electron excitation means for generating a high energy electron beam; a laser cavity with its optical axis transverse to the electron beam generated by said electron excitation means; a gaseous mixture of Xe and Br 2 in said laser cavity; said Br 2 forming from 0.1-4% of said mixture.
Claim 9
Dependent Claim
29 words
A Xenon Bromide excimer laser as claimed in claim 6, in which; said gaseous mixture in said laser cavity has a total pressure of from 10 to 3000 torr.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |