Title:
SURFACE EMITTING DFB LASER STRUCTURES AND ARRAY OF THE SAME FOR BROADBAND COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO2003044910
Kind Code:
A3
Abstract:
A surface emitting semiconductor laser (10) is shown having a semiconductor lasing structure having an active layer (22), opposed cladding layers contiguous to said active layer, a substrate (17), and electrodes (12,14) by which current can be injected into the semiconductor lasing structure. Also included is a second or higher order distributed diffraction grating (24) having periodically alternating elements, each of the elements being characterized as being either a high gain element (26) or a low gain element (28). Each of the elements has a length, the length of the high gain element and the length of the low gain element together defining a grating period, where the grating period is in the range required to produce an optical signal in the optical telecommunications signal band. The total length of the high gain elements is no more than the total the lengths of the low gain elements. A single laser structure may be provided or an array of side by side laser structures on a common substrate is also provided. In a further aspect a method of testing laser structures on wafer is provided.
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Inventors:
SHAMS-ZADEH-AMIRI ALI M (CA)
Application Number:
PCT/CA2002/001746
Publication Date:
December 11, 2003
Filing Date:
November 15, 2002
Export Citation:
Assignee:
PHOTONAMI INC (CA)
SHAMS-ZADEH-AMIRI ALI M (CA)
SHAMS-ZADEH-AMIRI ALI M (CA)
International Classes:
H01S1/00; H01S5/12; H01S5/187; H01S5/40; H01S5/026; H01S5/0683; (IPC1-7): H01S5/12; H01S5/18; H01S5/187
Domestic Patent References:
| WO2001013480A1 | 2001-02-22 |
Foreign References:
| US5727013A | 1998-03-10 | |||
| US5452318A | 1995-09-19 | |||
| US5970081A | 1999-10-19 |
Other References:
LOPEZ J ET AL: "Surface-emitting, distributed-feedback diode lasers with uniform near-field intensity profile", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 73, no. 16, 19 October 1998 (1998-10-19), pages 2266 - 2268, XP002152446, ISSN: 0003-6951
MASOUD KASRAIAN ET AL: "SINGLE-LOBED FAR-FIELD RADIATION PATTERN FROM SURFACE-EMITTING COMPLEX-COUPLED DISTRIBUTED-FEEDBACK DIODE LASERS", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 67, no. 19, 6 November 1995 (1995-11-06), pages 2783 - 2785, XP000544220, ISSN: 0003-6951
LOPEZ J G ET AL: "Uniform near-field, symmetric-mode surface emission from complex-coupled 2nd-order distributed-feedback lasers", LASERS AND ELECTRO-OPTICS SOCIETY ANNUAL MEETING, 1997. LEOS '97 10TH ANNUAL MEETING. CONFERENCE PROCEEDINGS., IEEE SAN FRANCISCO, CA, USA 10-13 NOV. 1997, NEW YORK, NY, USA,IEEE, US, 10 November 1997 (1997-11-10), pages 9 - 10, XP010252627, ISBN: 0-7803-3895-2
KAZARINOV R.F. AND HENRY C.H.: "Second-Order Distributed Feedback Lasers with Mode Selection Provided by First-Order Radiation Losses", JOURNAL OF QUANTUM ELECTRONICS, vol. 73, no. 16, 2 February 1985 (1985-02-02), pages 144 - 150, XP000705456
MASOUD KASRAIAN ET AL: "SINGLE-LOBED FAR-FIELD RADIATION PATTERN FROM SURFACE-EMITTING COMPLEX-COUPLED DISTRIBUTED-FEEDBACK DIODE LASERS", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 67, no. 19, 6 November 1995 (1995-11-06), pages 2783 - 2785, XP000544220, ISSN: 0003-6951
LOPEZ J G ET AL: "Uniform near-field, symmetric-mode surface emission from complex-coupled 2nd-order distributed-feedback lasers", LASERS AND ELECTRO-OPTICS SOCIETY ANNUAL MEETING, 1997. LEOS '97 10TH ANNUAL MEETING. CONFERENCE PROCEEDINGS., IEEE SAN FRANCISCO, CA, USA 10-13 NOV. 1997, NEW YORK, NY, USA,IEEE, US, 10 November 1997 (1997-11-10), pages 9 - 10, XP010252627, ISBN: 0-7803-3895-2
KAZARINOV R.F. AND HENRY C.H.: "Second-Order Distributed Feedback Lasers with Mode Selection Provided by First-Order Radiation Losses", JOURNAL OF QUANTUM ELECTRONICS, vol. 73, no. 16, 2 February 1985 (1985-02-02), pages 144 - 150, XP000705456
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