US4864577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly repetitively pulsed laser device
Assignee: Hamamatsu Photonics KK
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Filing: 1988-06-07
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Granted: 1989-09-05
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Expires: 2008-06-07
Abstract
Abstract A highly repetitively pulsed laser device is provided including a feedback system simple in construction which returns a light pulse emitted from a laser resonator to the laser resonator so that the light pulse is superposed on a light pulse in the laser resonator.
Inventors
- 👤 Shinichiro Aoshima
- 👤 Yutaka Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:09
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1106; H01S3/1112; H01S3/1115; H01S3/05; H01S3/08; H01S3/081; H01S3/082; H01S3/10076; H01S3/1123; H01S3/1127; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A repetitively pulsed laser device comprising: a laser resonator forming go and return paths for a light pulse; excitation means for exciting a light pulse through said go path, said light pulse exiting said laser resonator; and feedback means for returning the light pulse emitted from said laser resonator to said laser resonator through the return path, said light pulse being superposed on the light pulse in said laser resonator.
Claim 2
Dependent Claim
70 words
A repetitively pulsed laser device comprising: a laser resonator forming go and return paths for a light pulse; excitation means for exciting a light pulse through said go path, said light pulse exiting said laser resonator; and feedback means for returning the light pulse emitted from said laser resonator to said laser resonator through the return path, said light pulse being superposed on the light pulse in said laser resonator.
Claim 3
Dependent Claim
58 words
A device as claimed in claim 1, wherein said feedback means includes a total reflection mirror for returning said light pulse emitted from said laser resonator to said laser resonator, an optical delay distance provided by said total reflection mirror being adjusted to return said light pulse to be superposed on the light pulse in said laser resonator.
Claim 4
Dependent Claim
53 words
A device as claimed in claim 1, wherein said feedback means includes a nonlinear optical crystal for returning said light pulse emitted from said laser resonator to said laser resonator, wherein a phase conjugate wave from said nonlinear optical crystal is superposed, as feedback light, on the light pulse in said laser resonator.
Claim 5
Dependent Claim
30 words
A device as claimed in claim 1, wherein said device is a mode-locked laser device in which a gas, liquid, solid or semiconductor laser is mode-locked using a mode-locking element.
Claim 6
Dependent Claim
36 words
A device as claimed in claim 1, wherein said device is a mode-locked, Q-switched laser device in which a gas, liquid or solid laser is Q-switched and mode-locked using a Q-switching element and a mode-locking element.
Claim 7
Dependent Claim
36 words
A device as claimed in claim 1, wherein said device is a mode-locked, cavity-dumping laser device in which a gas, liquid or solid laser is cavity-dumping and mode-locked using a cavity-dumping element and a mode-locking element.
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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |