US4922496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armonic generation in optical fibers
Assignee: Viavi Solutions Inc
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Filing: 1987-12-17
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Granted: 1990-05-01
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Expires: 2007-12-17
Abstract
Abstract Apparatus for providing self-organized, phase-matched harmonic generated radiation which includes a single-mode fiber doped with ytterbium or ytterbium-aluminum which is placed in a laser cavity having a mode-locking and a Q-switching apparatus.
Inventors
- 👤 Hong Po
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/10; H01S3/106; H01S3/108; H01S3/109; H01S3/11; H01S3/1106; H01S3/1109; H01S3/1123; H01S3/117; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1691; H01S3/1693
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
Apparatus for providing second harmonic generated radiation which comprises: an optical fiber disposed in a laser cavity, the optical fiber having a substantially single-mode core which is doped with an active laser material, the laser material being self-organizable to produce radiation by second harmonic generation, the laser material further being substantially transparent to the second harmonic generated radiation; and means for pumping the core of the optical fiber to produce laser radiation therein and said laser cavity further comprising means for extracting at least a portion of the second harmonic generated radiation.
Claim 2
Dependent Claim
92 words
Apparatus for providing second harmonic generated radiation which comprises: an optical fiber disposed in a laser cavity, the optical fiber having a substantially single-mode core which is doped with an active laser material, the laser material being self-organizable to produce radiation by second harmonic generation, the laser material further being substantially transparent to the second harmonic generated radiation; and means for pumping the core of the optical fiber to produce laser radiation therein and said laser cavity further comprising means for extracting at least a portion of the second harmonic generated radiation.
Claim 3
Dependent Claim
34 words
The apparatus of claim 1 which further comprises means for mode-locking the laser radiation output from the core of the optical fiber and means for Q-switching the laser radiation output from the optical fiber.
Claim 4
Dependent Claim
44 words
The apparatus of claim 2 wherein the core comprises a fused silica core and the laser material is selected from the group consisting of Yb 3+ , Yb 2+ , Tb 3+ , Tb 4+ , Ce 3+ , Ce 4+ , and ytterbium-aluminum.
Claim 5
Dependent Claim
43 words
The apparatus of claim 3 wherein the optical fiber further comprises a multi-mode cladding surrounding the single-mode core and a further cladding surrounding the multi-mode cladding, and the single-mode core is disposed at an offset from the geometric center of the multi-mode cladding.
Claim 6
Dependent Claim
43 words
The apparatus of claim 3 wherein the optical fiber further comprises a multi-mode cladding surrounding the single-mode core and a further cladding surrounding the multi-mode cladding, and the length of the cross-sectional area of the multi-mode cladding is substantially different from the width.
Claim 7
Dependent Claim
69 words
The apparatus of claim 5 wherein the laser cavity comprises a first dichroic reflector disposed before one end of the fiber and a second dichroic reflector disposed after the other end of the fiber, and wherein at least one of said reflectors is at least partially transparent to the second harmonic generated radiation to provide the means for extracting at least a portion of the second harmonic generated radiation.
Claim 8
Dependent Claim
16 words
The apparatus of claim 2 wherein the mode-locking means and the Q-switching means are electro-acoustical means.
Claim 9
Dependent Claim
93 words
Method for providing second harmonic generated radiation which comprises the steps of: placing an optical fiber in a laser cavity, the optical fiber having a substantially single-mode core which is doped with an active laser material, the laser material being self-organizable to produce radiation by second harmonic generation, the laser material further being substantially transparent to the second harmonic generated radiation, and said laser cavity further comprising means for extracting at least a portion of the second harmonic generated radiation; and pumping the core of the optical fiber to produce laser radiation therein.
Claim 10
Dependent Claim
93 words
Method for providing second harmonic generated radiation which comprises the steps of: placing an optical fiber in a laser cavity, the optical fiber having a substantially single-mode core which is doped with an active laser material, the laser material being self-organizable to produce radiation by second harmonic generation, the laser material further being substantially transparent to the second harmonic generated radiation, and said laser cavity further comprising means for extracting at least a portion of the second harmonic generated radiation; and pumping the core of the optical fiber to produce laser radiation therein.
Claim 11
Dependent Claim
44 words
The method of claim 8 wherein the core comprises a fused silica core and the laser material is selected from the group consisting of Yb 3+ , Yb 2+ , Tb 3+ , Tb 4+ , Ce 3+ , Ce 4+ , and ytterbium-aluminum.
Claim 12
Dependent Claim
21 words
The method of claim 8 which further comprises the steps of mode-locking and Q-switching laser radiation output from the optical fiber.
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) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |