US4991182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical relay imaging in the common pass annular laser amplifier
Assignee: Boeing North American Inc
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Filing: 1989-09-22
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Granted: 1991-02-05
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Expires: 2009-09-22
Abstract
Abstract An annular ring resonator which employs relay imaging to reduce crosstalk caused by diffusion which occurs between biconic mirrors 30 and 31 in the resonator.
Inventors
- 👤 Jerry D. Logan
- 👤 Thomas R. Waite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:16
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/083
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes comprising: a ring resonator having a gain medium, a laser beam, a scraper mirror which generates a sharp edged feedback beam when the feedback beam passes through the scraper mirror, a plurality of mirrors which reflect the feedback beam so as to relay image the sharp edged feedback beam onto an annular input mirror in the ring resonator.
Claim 2
Dependent Claim
74 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes comprising: a ring resonator having a gain medium, a laser beam, a scraper mirror which generates a sharp edged feedback beam when the feedback beam passes through the scraper mirror, a plurality of mirrors which reflect the feedback beam so as to relay image the sharp edged feedback beam onto an annular input mirror in the ring resonator.
Claim 3
Dependent Claim
66 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes comprising: a ring resonator having a gain medium, a laser beam, a rear cone ring mirror and an outer conical mirror having an annular input mirror and an annular output mirror, the rear cone ring mirror relay images an image from the annular input mirror onto the annular output mirror.
Claim 4
Dependent Claim
66 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes comprising: a ring resonator having a gain medium, a laser beam, a rear cone ring mirror and an outer conical mirror having an annular input mirror and an annular output mirror, the rear cone ring mirror relay images an image from the annular input mirror onto the annular output mirror.
Claim 5
Dependent Claim
93 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes comprising: a ring resonator having a gain medium, a laser beam, a scraper mirror which generates a sharp edged feedback beam when the feedback beam passes through the scraper mirror, a plurality of mirrors which reflect the feedback beam so as to relay image the sharp edged feedback beam onto an annular input mirror, a rear cone ring mirror which relay images the sharp edged feedback beam image from the annular input to an annular output mirror.
Claim 6
Dependent Claim
93 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes comprising: a ring resonator having a gain medium, a laser beam, a scraper mirror which generates a sharp edged feedback beam when the feedback beam passes through the scraper mirror, a plurality of mirrors which reflect the feedback beam so as to relay image the sharp edged feedback beam onto an annular input mirror, a rear cone ring mirror which relay images the sharp edged feedback beam image from the annular input to an annular output mirror.
Claim 7
Dependent Claim
123 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes as in claim 1, where the plurality of mirrors which reflect the sharp edged feedback beam are a plurality of turning mirrors where a first mirror receives the image of the sharp edged feedback beam and reflects it to second mirror which is optically curved to relay image the sharp edged feedback beam to a third mirror which is optically curved to relay image the sharp edged feedback beam onto a fourth mirror which reflects the sharp edged feedback beam and projects an image of the sharp edged feedback beam onto the annular input mirror side of a biconic outer conical mirror in the annular ring resonator.
Claim 8
Dependent Claim
138 words
An annular ring resonator employing relay imaging to reduce crosstalk between the forward and reverse modes as in claim 3, where the plurality of mirrors which reflect the feedback beam so as to relay image the sharp edged feedback beam onto the annular input mirror consists of a plurality of turning mirrors where a first mirror receives the image of the sharp edged feedback beam and reflects it to a second mirror which is optically curved to relay image the sharp edged feedback beam to a third mirror which is optically curved to relay image the sharp edged feedback beam to a fourth mirror which reflects the sharp edged feedback beam and projects an image on the sharp edged feedback beam onto the annular input mirror side of a biconic outer conical mirror in the annular ring resonator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |