Patent US5260957A successfully refreshed from Google Patents.
US5260957A
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Quantum dot Laser
Assignee: Charles Stark Draper Laboratory Inc
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Filing: 1992-10-29
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Granted: 1993-11-09
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Expires: 2012-10-29
Abstract
Abstract A quantum dot laser includes a laser host material; a plurality of quantum dots disposed in the host material; and a pumping source for exciting and inducing a population inversion in the quantum dots.
Inventors
- 👤 Farhad Hakimi
- 👤 Moungi G. Bawendi
- 👤 Richard Tumminelli
- 👤 John R. Haavisto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:51
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; B; B82; B82Y; B82Y20/00; H01S2301/00; H01S2301/04; H01S3/00; H01S3/05; H01S3/06; H01S3/14; H01S3/16; H01S3/17; H01S3/178; H01S5/34; H01S5/341; H01S5/3412; Y; Y10; Y10S; Y10S977/00; Y10S977/902; Y10S977/932; Y10S977/949; Y10S977/95; Y10S977/951
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
32 words
A quantum dot laser comprising: a laser host material; a plurality of quantum dots disposed in said host material; and a pumping source for exciting a population inversion in said quantum dots.
Claim 2
Dependent Claim
32 words
A quantum dot laser comprising: a laser host material; a plurality of quantum dots disposed in said host material; and a pumping source for exciting a population inversion in said quantum dots.
Claim 3
Dependent Claim
16 words
The quantum dot laser of claim 1 in which said laser host material is a polymer.
Claim 4
Dependent Claim
14 words
The quantum dot laser of claim 2 in which said polymer is polymethylmethacrylate (PMMA).
Claim 5
Dependent Claim
17 words
The quantum dot laser of claim 1 in which said quantum dots are all the same size.
Claim 6
Dependent Claim
17 words
The quantum dot laser of claim 1 in which said quantum dots are all the same material.
Claim 7
Dependent Claim
21 words
The quantum dot laser of claim 1 in which said quantum dots are all the same material and the same size.
Claim 8
Dependent Claim
17 words
The quantum dot laser of claim 1 in which said pumping source is an optical pumping source.
Claim 9
Dependent Claim
16 words
The quantum dot laser of claim 1 in which said laser is a bulk optic laser.
Claim 10
Dependent Claim
36 words
The quantum dot laser of claim 1 in which said laser includes a cladding surrounding said host material and having a lower refractive index than said host material and said laser is a channel waveguide laser.
Claim 11
Dependent Claim
15 words
The quantum dot laser of claim 9 in which said host material is a polymer.
Claim 12
Dependent Claim
14 words
The quantum dot laser of claim 10 in which said cladding is a polymer.
Claim 13
Dependent Claim
15 words
The quantum dot laser of claim 1 in which said host material is a polymer.
Claim 14
Dependent Claim
15 words
The quantum dot laser of claim 1 in which said quantum dots are cadmium selenide.
Claim 15
Dependent Claim
15 words
The quantum dot laser of claim 1 in which said quantum dots are zinc telluride.
Claim 16
Dependent Claim
15 words
The quantum dot laser of claim 1 in which said quantum dots are cadmium telluride.
Claim 17
Dependent Claim
15 words
The quantum dot laser of claim 1 in which said quantum dots are zinc selenide.
Claim 18
Dependent Claim
49 words
A quantum dot waveguide laser comprising: a laser host material; a cladding surrounding and having a lower index of refraction than said host material; a plurality of quantum dots disposed in said host material; and a pumping source for exciting and inducing a population inversion in said quantum dots.
Claim 19
Dependent Claim
49 words
A quantum dot waveguide laser comprising: a laser host material; a cladding surrounding and having a lower index of refraction than said host material; a plurality of quantum dots disposed in said host material; and a pumping source for exciting and inducing a population inversion in said quantum dots.
Claim 20
Dependent Claim
16 words
The quantum dot waveguide laser of claim 17 in which said host material is a polymer.
Claim 21
Dependent Claim
15 words
The quantum dot waveguide laser of claim 17 in which said cladding is a polymer.
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) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |