Patent EP0267667A2 successfully refreshed from Google Patents.
EP0267667A2
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Distributed feedback laser
Assignee: STC PLC
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Filing: 1987-06-24
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Granted: —
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Expires: 2007-06-24
Abstract
Abstract A distributed feedback (DFB) laser having a divided electrode structure (70,71,72) on one surface by means of which the injected current distribution in the laser may be modified so as to enable independent control of laser output amplitude and wavelength.
Inventors
- 👤 Richard Gordon Samuel Plumb
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 12:45
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/06; H01S5/062; H01S5/0625; H01S5/06255; H01S5/06258; H01S5/10; H01S5/12; H01S5/04; H01S5/042; H01S5/0425; H01S5/04256; H01S5/1206; H01S5/1215
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
51 words
A distributed feedback (DFB) laser provided with three or more electrodes disposed such that by control of the relative current flow through said electrodes the injected current profile in the distributed feedback region of the laser is adjustable to vary the frequency of the laser output independently of its optical amplitude.
Claim 2
Dependent Claim
51 words
A distributed feedback (DFB) laser provided with three or more electrodes disposed such that by control of the relative current flow through said electrodes the injected current profile in the distributed feedback region of the laser is adjustable to vary the frequency of the laser output independently of its optical amplitude.
Claim 3
Dependent Claim
22 words
A DFB laser as claimed in claim 1, wherein one surface of the laser is provided with a longitudinally divided electrode structure.
Claim 4
Dependent Claim
26 words
A DFB laser as claimed in claim 2, wherein said longitudinally divided electrode structure has electrically distinct component parts overlying regions of different optical propagation constants.
Claim 5
Dependent Claim
36 words
A DFB laser as claimed in claim 3, wherein said regions of different optical propagation constants are created by changes in the thickness of one or more of semiconductive layers of which the laser is constructed.
Claim 6
Dependent Claim
34 words
A DFB laser as claimed in claim 3, wherein said regions of different optical propagation constants are created by changes in composition of one or more semiconductive layers of which the laser is constructed.
Claim 7
Dependent Claim
43 words
A DFB laser as claimed in claim 1, wherein one surface of the laser is provided with a transversely divided electrode structure electrically distinct component parts of which overlie regions of the distributed feedback grating of the laser having different configurations of pitch.
References Cited (Backward Citations)
No citation records indexed.
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