Optical fiber coupling part

Details Optical fiber coupling part Optical fiber coupling part

2004-09-28

2008-03-18

Connelly-Cushwa, Michelle (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

Reexamination Certificate

active

07346237

ABSTRACT:
An optical fiber coupling part capable of reducing coupling loss while maintaining a large operating distance, and having a good module assembling property. AT least one GRIN lens having numerical aperture NA that is larger than numerical aperture NAs of a light-emitting source (such as a semiconductor laser) is fusion-spliced with one end of the optical fiber. All lights emitted from the light-emitting source can enter the GRIN lens, and the loss of the light can thereby be reduced. In addition, a second GRIN lens having numerical aperture NA2is fusion-spliced with one end of the optical fiber having numerical aperture NAf, and further a first GRIN lens having numerical aperture NA1, which is larger than numerical aperture NA2, is fusion-spliced with the other end of the second GRIN lens. Thereby, the light emitted from the light-emitting source can efficiently enter the optical fiber, and loss of the light can thereby be reduced. In this case, the formula expressed by NAf≦NA2<NAs≦NA1is desirable.

REFERENCES:
patent: 3910677 (1975-10-01), Becker et al.
patent: 4701011 (1987-10-01), Emkey et al.
patent: 5384874 (1995-01-01), Hirai et al.
patent: 5865867 (1999-02-01), Kinoshita
patent: 5881195 (1999-03-01), Walker
patent: 6594419 (2003-07-01), Ukrainczyk et al.
patent: 2002/0150333 (2002-10-01), Reed et al.
patent: 1 260 841 (2007-07-01), None
patent: 62-296105 (1987-12-01), None
patent: 4-260609 (1992-09-01), None
patent: 7-149525 (1995-06-01), None
patent: 7-333463 (1995-12-01), None
patent: 8-292341 (1996-11-01), None
patent: 2001-521633 (2001-11-01), None
patent: 2002-182073 (2002-06-01), None
patent: 2002-350666 (2002-12-01), None
patent: 2003-227963 (2003-08-01), None
patent: 97/29392 (1997-08-01), None
patent: 03/076992 (2003-09-01), None
patent: 03/076994 (2003-09-01), None
Yamagishi et al., “Gradient-index rod lens with high N.A.”, Applied Optics, vol. 22, No. 3 , Feb. 1, 1983.
Kitano et al., “Gradient-index lens for low-loss coupling of a laser diode to single-mode fiber”, Applied Optics, vol. 25, No. 19, Oct. 1, 1986.
T. Sakamato, “Laser-Diode/Mutlimode-Fibre Couling Analysis Using A Planoconvex GRIN Lens”, Electronics Letters, vol. 22, No. 25, Dec. 4, 1986.
Shingyouchi et al., “Determination of Diffusion Coefficient of Titanium Ion in TiO2-Sio2Wet Gel Prepared from Metal Alkoxides During Leaching”,Journal of Non-Crystalline Solids, vol. 100, pp. 383-387, 1988.
Konishi et al.,r-Grin Glass Rods Prepared by a Sol-Gel Method,Journal of Non-Crystalline Solids, vol. 100, pp. 511-513, 1988.
Chinese Office Action issued Sep. 7, 2007 (with English language version) in Chinese Application No. 200480026727.1, which is a foreign counterpart to the present U.S. application.

Affiliated with

Also associated with

Rating

Optical fiber coupling part does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical fiber coupling part, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical fiber coupling part will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3979013