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公开(公告)号：JP2000022245A
公开(公告)日：2000-01-21
申请号：JP10155099
申请日：1999-04-08
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA , PAOLETTI ROBERTO , SCOFET MARCO , TALLONE LUIGI
Abstract: PROBLEM TO BE SOLVED: To provide a laser module which can shorten a full length of a cavity. SOLUTION: A laser module 1 includes a Fabry-Pero cavity active element 2 having a facet 3 for carrying an anti-reflection film thereon, and an external cavity defined by an optical fiber Bragg grating having a low reflection factor. The grating 5 exhibits a modulation profile having a reflection factor asymmetrical and non-uniform in a length direction of the grating. Thereby a position on an equivalent mirror surface is offset toward an end of the grating 5 closer to the active element 2.
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公开(公告)号：CA2268428A1
公开(公告)日：1999-10-10
申请号：CA2268428
申请日：1999-04-09
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： SCOFET MARCO , TALLONE LUIGI , MELIGA MARINA , PAOLETTI ROBERTO
Abstract: A laser module comprises a Fabry-Perot cavity active element with a facet bearing an anti-reflection coating and an external cavity made by an optical fibre Bragg grating with low reflectivity. This grating presents a non-uniform profile of modulation of the refractive index, asymmetrical in the direction of the grating length, such as to give rise to a position of the equivalent mirror plane that is offset towards the end of the grating that is closer to the active element.
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公开(公告)号：CA2268428C
公开(公告)日：2001-12-04
申请号：CA2268428
申请日：1999-04-09
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA , PAOLETTI ROBERTO , SCOFET MARCO , TALLONE LUIGI
Abstract: A laser module comprises a Fabry-Perot cavity active element with a facet bearing an anti-reflection coating and an external cavity made by an optical fibre Bragg grating with low reflectivity. This grating presents a non-uniform profile of modulation of the refractive index, asymmetrical in the direction of the grating length, such as to give rise to a position of the equivalent mirror plane that is offset towards the end of the grating that is closer to the active element.
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公开(公告)号：CA2068443C
公开(公告)日：1996-05-21
申请号：CA2068443
申请日：1992-05-12
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA
IPC: H01S5/00 , H01S5/12 , H01S5/34 , H01S3/1055 , H01S3/103
Abstract: A distributed feedback semiconductor laser is provided whose active medium presents a periodic thickness variation in the direction of light propagation so as to generate a periodic gain variation, while maintaining a constant effective refractive index. The laser has a discrete multi-quantum wire structure. A method of manufacturing such a laser is also described.
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公开(公告)号：CA2068443A1
公开(公告)日：1992-11-14
申请号：CA2068443
申请日：1992-05-12
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA
Abstract: In a distributed feedback semiconductor laser, the active medium presents a periodic thickness variation in the light propagation direction so as to generate a periodic gain variation, while maintaining the effective refractive index constant, and has a discrete multi-quantum wire structure. A method of manufacturing such a laser is also provided.
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Patent Agency Ranking
公开(公告)号：ITTO910352A1
公开(公告)日：1992-11-14
申请号：ITTO910352
申请日：1991-05-13
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA
IPC: H01S5/00 , H01S20060101 , H01S5/12 , H01S5/34
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公开(公告)号：ITTO910352D0
公开(公告)日：1991-05-13
申请号：ITTO910352
申请日：1991-05-13
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA
Abstract: In a distributed feedback semiconductor laser, the active medium presents a periodic thickness variation in the light propagation direction so as to generate a periodic gain variation, while maintaining the effective refractive index constant, and has a discrete multi-quantum wire structure. A method of manufacturing such a laser is also provided.
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公开(公告)号：DE69203784T2
公开(公告)日：1995-12-21
申请号：DE69203784
申请日：1992-05-12
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA
Abstract: In a distributed feedback semiconductor laser, the active medium presents a periodic thickness variation in the light propagation direction so as to generate a periodic gain variation, while maintaining the effective refractive index constant, and has a discrete multi-quantum wire structure. A method of manufacturing such a laser is also provided.
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公开(公告)号：DE69203784D1
公开(公告)日：1995-09-07
申请号：DE69203784
申请日：1992-05-12
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA
Abstract: In a distributed feedback semiconductor laser, the active medium presents a periodic thickness variation in the light propagation direction so as to generate a periodic gain variation, while maintaining the effective refractive index constant, and has a discrete multi-quantum wire structure. A method of manufacturing such a laser is also provided.
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公开(公告)号：IT1245541B
公开(公告)日：1994-09-29
申请号：ITTO910352
申请日：1991-05-13
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MELIGA MARINA
Abstract: In a distributed feedback semiconductor laser, the active medium presents a periodic thickness variation in the light propagation direction so as to generate a periodic gain variation, while maintaining the effective refractive index constant, and has a discrete multi-quantum wire structure. A method of manufacturing such a laser is also provided.
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