US5105433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interferometric semiconductor laser
Assignee: Alcatel Lucent SAS
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Filing: 1990-09-14
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Granted: 1992-04-14
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Expires: 2010-09-14
Abstract
Abstract A semiconductor laser which includes a controllable beam splitter has three segments including laser-active zones and a monitor diode forming a cross-shaped laser connected with one another by way of the beam splitter. The beam splitter is equipped with electrodes for controlling optical coupling between the segments.
Inventors
- 👤 Hartmut Eisele
- 👤 Olaf Hildebrand
- 👤 Albrecht Mozer
- 👤 Michael Schilling
- 👤 Heinz Schweizer
- 👤 Klaus Wunstel
- 👤 Ulrich Spalthoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:23
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/026; H01S5/0262; H01S5/0264; H01S5/06; H01S5/062; H01S5/0625; H01S5/06255; H01S5/10; H01S5/1003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
An electrically tunable, interferometric semiconductor laser including: at least three segments monolithically integrated on a semiconductor wafer and each provided with at least one laser-active zone and a mirror at an end; and beam splitter means disposed between said at least three segments for optically connecting said segments with one another, said beam splitter means having two electrodes for controlling the transmission and refection of laser light between said segments.
Claim 2
Dependent Claim
70 words
An electrically tunable, interferometric semiconductor laser including: at least three segments monolithically integrated on a semiconductor wafer and each provided with at least one laser-active zone and a mirror at an end; and beam splitter means disposed between said at least three segments for optically connecting said segments with one another, said beam splitter means having two electrodes for controlling the transmission and refection of laser light between said segments.
Claim 3
Dependent Claim
16 words
A semiconductor laser according to claim 1, wherein said beam splitter means includes a holographic grating.
Claim 4
Dependent Claim
18 words
A semiconductor laser according to claim 1, wherein said beam splitter means is configured as a Y coupler.
Claim 5
Dependent Claim
38 words
A semiconductor laser according to claim 2, wherein one of said at least three segments is provided with a ridge waveguide laser; and two others of said at least three segments are each provided with a broad-area laser.
Claim 6
Dependent Claim
21 words
A semiconductor laser according to claim 1, wherein each one of said at least three segments includes a ridge waveguide laser.
Claim 7
Dependent Claim
31 words
A semiconductor laser according to claim 1, wherein a monitor diode is provided at right angles with two of said at least three segments for controlling the laser light output power.
Claim 8
Dependent Claim
92 words
A semiconductor laser according to claim 6, wherein said beam splitter means includes a partially transparent mirror having a vertical surface, and wherein said beam splitter means has a first and a second half, each half having a horizontal surface of a different height, the height of said first surface placing said first surface in a plane with two of said at least three segments and the height of said second surface placing said second surface in a plane with a third of said at least three segments and said monitor diode.
Claim 9
Dependent Claim
34 words
An arrangement wherein a plurality of semiconductor lasers according to claim 7 are provided on a single substrate disposed so that the surfaces of their beam splitter means mirrors lie in a straight line.
Claim 10
Dependent Claim
18 words
A semiconductor laser according to claim 1, wherein said at least three segments are provided with quantum-well lasers.
Claim 11
Dependent Claim
35 words
A semiconductor laser according to claim 1, wherein said beam splitter means comprises two beam splitters; and said laser includes three monitor diodes for controlling phase, power and filter wavelength of the laser light, respectively.
References Cited (Backward Citations)
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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) | 1995-04-14 | 1995-10-14 | 1996-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-14 | 1999-10-14 | 2000-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-14 | 2003-10-14 | 2004-04-14 | $7700.00 | Window Closed / Lapsed |