US4924474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser device with high oscillation efficiency
Assignee: Mitsubishi Electric Corp
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Filing: 1989-02-10
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Granted: 1990-05-08
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Expires: 2009-02-10
Abstract
Abstract A laser device comprises a laser medium, a semiconductor light-emitting element for exciting the laser medium, a reflecting surface surrounding the outer periphery of the laser medium along its optical axis, and an opening provided in a part of the reflecting surface for causing light from the semiconductor light-emitting element to be incident upon the laser medium. The laser device is improved further by providing a polarizing plate and a light guide between the light-emitting element and the laser medium and by deviating the optical axis of excitation light from the central axis of the laser medium.
Inventors
- 👤 Shigenori Yagi
- 👤 Yasuhito Myoi
- 👤 Masaki Kuzumoto
- 👤 Kazuki Kuba
- 👤 Yoshito Seiwa
- 👤 Toshitaka Aoyagi
- 👤 Yutaka Mihashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:56
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/094; H01S3/0941; H01S3/02; H01S3/04; H01S3/042; H01S3/0915; H01S3/0933; H01S3/025; H01S3/094049; H01S3/094057; H01S3/09408
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
62 words
A laser device, comprising: a laser medium; a semiconductor light-emitting element, disposed adjacent said laser medium, for exciting said laser medium directly; a reflecting surface surrounding the outer periphery of said laser medium along its optical axis; an opening provided in a part of said reflecting surface for causing light from said semiconductor light-emitting element to be incident upon said laser medium.
Claim 2
Dependent Claim
62 words
A laser device, comprising: a laser medium; a semiconductor light-emitting element, disposed adjacent said laser medium, for exciting said laser medium directly; a reflecting surface surrounding the outer periphery of said laser medium along its optical axis; an opening provided in a part of said reflecting surface for causing light from said semiconductor light-emitting element to be incident upon said laser medium.
Claim 3
Dependent Claim
23 words
A laser device of claim 1,wherein said reflecting surface is a multi-layered film coating provided on the inner surface of said reflecting body.
Claim 4
Dependent Claim
23 words
A laser device of claim 1, wherein said reflecting surface is a metal plating provided on the inner surface of said reflecting body.
Claim 5
Dependent Claim
22 words
A laser device of claim 1, wherein said reflecting surface is a reflecting film which is directly provided on said laser medium.
Claim 6
Dependent Claim
30 words
A laser device of claim 1, further comprising a transparent adhesive provided between said laser medium and said reflecting body, and a heat radiating means provided on said reflecting body.
Claim 7
Dependent Claim
25 words
A laser device of claim 1, further comprising a plurality of semiconductor light-emitting elements, said elements being disposed symmetrically with respect to said laser medium.
Claim 8
Dependent Claim
70 words
A laser device, comprising: a laser medium, a semiconductor light-emitting element for exciting said laser medium; a reflecting surface surrounding the outer periphery of said laser medium along its optical axis; an opening provided in a part of said reflecting surface for causing light from said semiconductor light-emitting element to be incident upon said laser medium; and a polarizing plate provided between said semiconductor light-emitting element and said laser medium.
Claim 9
Dependent Claim
70 words
A laser device, comprising: a laser medium, a semiconductor light-emitting element for exciting said laser medium; a reflecting surface surrounding the outer periphery of said laser medium along its optical axis; an opening provided in a part of said reflecting surface for causing light from said semiconductor light-emitting element to be incident upon said laser medium; and a polarizing plate provided between said semiconductor light-emitting element and said laser medium.
Claim 10
Dependent Claim
21 words
A laser device of claim 7, further comprising a phase delay element provided between said polarizing plate and said laser medium.
Claim 11
Dependent Claim
38 words
A laser device of claim 1, wherein said opening is located so that light emitted from said semiconductor light-emitting element is incident upon said laser medium in a direction deviated from a central axis of said laser medium.
Claim 12
Dependent Claim
26 words
A laser device of claim 9, further comprising a plurality of semiconductor light-emitting elements, said elements being disposed symmetrically at both sides of said laser medium.
Claim 13
Dependent Claim
88 words
A laser device, comprising: a laser medium; a semiconductor light-emitting element for exciting said laser medium; a reflecting surface surrounding the outer periphery of said laser medium along its optical axis; an opening provided in a part of said reflecting surface for causing light from said semiconductor light-emitting element to be incident upon said laser medium; and a light guide for letting light from said light-emitting element by incident on said laser medium obliquely, said light guide being provided between aid semiconductor light-emitting element and said laser medium.
Claim 14
Dependent Claim
88 words
A laser device, comprising: a laser medium; a semiconductor light-emitting element for exciting said laser medium; a reflecting surface surrounding the outer periphery of said laser medium along its optical axis; an opening provided in a part of said reflecting surface for causing light from said semiconductor light-emitting element to be incident upon said laser medium; and a light guide for letting light from said light-emitting element by incident on said laser medium obliquely, said light guide being provided between aid semiconductor light-emitting element and said laser medium.
Claim 15
Dependent Claim
42 words
A laser device of claim 11, further comprising a holder for holding said laser medium, a filler provided between said laser medium and said holder, a cooling means provided in said holder, and a heat radiating means provided on said cooling means.
Claim 16
Dependent Claim
20 words
A laser device of claim 12, wherein said light guide includes a conical light reflecting surface provides in said holder.
Claim 17
Dependent Claim
25 words
A laser device of claim 12, wherein said light guide is a cavity provided in said holder, said light guide having a light reflecting surface.
Claim 18
Dependent Claim
31 words
A laser device of claim 12, wherein said light guide is constituted by an optical guide hole provided in said holder, and an optical fiber disposed in said optical guide hole.
Claim 19
Dependent Claim
26 words
A laser device of claim 11, further comprising a plurality of semiconductor light-emitting elements, said elements being disposed in an axial direction of said laser medium.
Claim 20
Dependent Claim
16 words
A laser device of claim 11, wherein said laser medium is of a plate-like slab type.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |