Title:
OPTICAL WAVE GUIDE AND METHOD FOR MANUFACTURE THEREOF
Document Type and Number:
WIPO Patent Application WO/2004/006394
Kind Code:
A1
Abstract:
An optical waveguide type amplifier which has a core (3) containing a rare earth element having a concentration distribution such that the concentration is high in a central portion of the core and become gradually lower toward the perimeter and also a modifying element for preventing the rare earth element from forming a cluster and for expanding the wavelength region for a light capable of being amplified having a concentration distribution similar to that of the rare earth element, wherein the concentration of the rare earth element is gradually decreased both in the X direction and the Y direction in a coordinate system formed, in a plane perpendicular to the light guiding direction of the core (3), by an X axis of the direction of the surface of a substrate (1) (the width direction of the plane) and a Y axis of the direction of the normal to the surface of a substrate (1) (the height direction of the plane). The optical waveguide type amplifier allows the achievement of an enhanced gain.
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Inventors:
FURUKAWA AKIO (JP)
SHIMODA TUYOSHI (JP)
DEKI YUKARI (JP)
SHIMODA TUYOSHI (JP)
DEKI YUKARI (JP)
Application Number:
PCT/JP2003/008241
Publication Date:
January 15, 2004
Filing Date:
June 27, 2003
Export Citation:
Assignee:
NEC CORP (JP)
FURUKAWA AKIO (JP)
SHIMODA TUYOSHI (JP)
DEKI YUKARI (JP)
FURUKAWA AKIO (JP)
SHIMODA TUYOSHI (JP)
DEKI YUKARI (JP)
International Classes:
G02B6/12; G02B6/122; G02B6/13; H01S3/06; H01S3/063; (IPC1-7): H01S3/063; G02B6/12
Foreign References:
| EP0474447A1 | 1992-03-11 | |||
| EP1127858A1 | 2001-08-29 | |||
| JPH05341145A | 1993-12-24 | |||
| JPH08213690A | 1996-08-20 | |||
| JPH0537045A | 1993-02-12 | |||
| JPH04359230A | 1992-12-11 | |||
| JPH04271328A | 1992-09-28 | |||
| JPH0921922A | 1997-01-21 | |||
| EP0476688A2 | 1992-03-25 |
Other References:
CHELNOKOV, A.V. et al., "Deep erbium-ytterbium implantation codoping of low-loss silicon oxynitride waveguides", Electronics Letters, 13 April 1995, Vol. 31, No. 8, pages 636 to 638
ZAKERY, A. et al., "Modeling of Erbium-Doped Fiber Amplifiers (EDFAS) Using a Gaussian Profile for the Doped Ion Concentration", Proceedings of the SPIE-The International Society for Optical Engineering, January 1999, Vol. 3622, pages 161 to 168
ARZI, E. et al., "A Model to Obtain an Optimized Erbium Density Profile in EDFA", Technical Digest, CLEO/Pacific Rim 2001, the 4th Pacific Rim Conference on Lasers and Electro-Optics, July 2001, Vol. II, pages II-278 to II-279
DE ALMEIDA, J.M.M.M. et al., "Optical amplification in Localized doping Er:Ti:LiNbO3 waveguides", Proceedings of the SPIE - The International Society for Optical Engineering, January 1999, Vol. 3622, pages 153 to 160
ZAKERY, A. et al., "Modeling of Erbium-Doped Fiber Amplifiers (EDFAS) Using a Gaussian Profile for the Doped Ion Concentration", Proceedings of the SPIE-The International Society for Optical Engineering, January 1999, Vol. 3622, pages 161 to 168
ARZI, E. et al., "A Model to Obtain an Optimized Erbium Density Profile in EDFA", Technical Digest, CLEO/Pacific Rim 2001, the 4th Pacific Rim Conference on Lasers and Electro-Optics, July 2001, Vol. II, pages II-278 to II-279
DE ALMEIDA, J.M.M.M. et al., "Optical amplification in Localized doping Er:Ti:LiNbO3 waveguides", Proceedings of the SPIE - The International Society for Optical Engineering, January 1999, Vol. 3622, pages 153 to 160
Attorney, Agent or Firm:
Yamakawa, Masaki c/o Yamakawa International Patent 0ffice (8th Floor Shuwa-Tameike Building, 4-2,
Nagatacho 2-chom, Chiyoda-ku Tokyo, JP)
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