US3609585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-power laser including means for providing power output
Assignee: Applied Biosystems Inc
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Filing: 1968-10-15
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Granted: 1971-09-28
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Expires: 1988-10-15
Abstract
Abstract A laser including a lasing material, exciting means for producing stimulated emission at a power level higher than that which can be tolerated by semitransparent mirrors, and a pair of opaque reflective mirrors defining a resonant optical cavity. The surface of at least one of the mirrors includes a plurality of periodic fluctuations, preferably comprising grooves, separated by flat regions so that the major proportion of an incident beam coaxial with the cavity is reflected back upon itself and a proportion of the incident beam sufficient to provide a useful power output is diffractively reflected to an angle to the axis of the cavity.
Inventors
- 👤 Robert E Hufnagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:57
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/08004; H01S3/08009; H01S3/02; H01S3/04; H01S3/0401
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
A laser as claimed in claim 1 wherein said periodicity is defined by the equation: a n lambda /sin theta where a is the length of one cycle, lambda is the wavelength of said characteristic emission, theta is one-half the angle between an incident beam perpendicular to said flat regions and the reflected beam diffracted by said fluctuation, and n is any integer.
Claim 2
Dependent Claim
54 words
A laser as claimed in claim 2 wherein said fluctuation comprises a surface region disposed at an angle to said flat regions, said angle between said regions being such that an incident beam perpendicular to said flat regions is reflected from said angled region at an angle of 2 theta from said incident beam.
Claim 3
Dependent Claim
34 words
A laser as claimed in claim 1 wherein said surface comprises a plurality of parallel grooves, one of said beams being reflected from the sidewalls of said grooves and one from said flat regions.
Claim 4
Dependent Claim
16 words
A laser as claimed in claim 4 wherein said grooves are separated by said flat regions.
Claim 5
Dependent Claim
17 words
A laser as claimed in claim 4 wherein said flat regions form the bottom of said grooves.
Claim 6
Dependent Claim
29 words
A laser as claimed in claim 4 wherein a major proportion of said surface is included in said flat regions, said first beam being reflected from said flat regions.
Claim 7
Dependent Claim
28 words
A laser as claimed in claim 4 wherein a major proportion of said surface contains said grooves, said first beam being reflected from a sidewall of said grooves.
Claim 8
Dependent Claim
14 words
A laser as claimed in claim 1 wherein said reflective members comprise metallic bodies.
Claim 9
Dependent Claim
145 words
A high-power laser for continuously producing an extremely high energy beam of radiation comprising: a material capable of producing stimulated emission; means of exciting said material to produce stimulated emission at a frequency characteristic of said material and at a power level higher than can be tolerated by a reflective body; means defining a resonant optical cavity comprising reflective embers opaque to radiation at said frequency, said cavity extending through said material; means adjacent to the back surface of said reflective members for removing heat at a rate at least equal to the rate of heat input from said stimulated emission; one of said members comprising an opaque reflective surface, said surface including a plurality of periodic fluctuations separated by coplanar flat regions, said surface producing a first-reflected beam coaxial with said cavity and a second reflected beam at an angle to said first beam.
Claim 10
Dependent Claim
30 words
A laser as claimed in claim 10 wherein said reflective members comprise opaque metallic bodies and wherein the back surfaces of said members are immersed in a forced-flow coolant stream.
Claim 11
Dependent Claim
17 words
A laser as claimed in claim 11 wherein said reflective members comprise a reflective metallic front surface.
Claim 12
Dependent Claim
168 words
A high-power laser comprising: a material capable of producing stimulated emission; means for exciting said material to produce stimulated emission at a frequency characteristic of said material and at a power level higher than can be tolerated by mirrors which partially transmit said frequency; means defining a resonant optical cavity comprising reflective members opaque to radiation at said frequency, said cavity extending through said material; one of said members comprising an opaque reflective surface, said surface including a plurality Of periodic fluctuations comprising peaks separated by coplanar flat regions, said surface producing a first reflected beam coaxial with said cavity and a second reflected beam at an angle to said first beam; said peaks having periodicity defined by the equation: a n lambda /sin theta where a is the length of one cycle, lambda is the wavelength of said characteristic emission, theta is one-half the angle between an incident beam perpendicular to said flat regions and the reflected beam diffracted by said fluctuation, and n is any integer.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |