Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2006-02-14
2006-02-14
Bovernick, Rodney (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
Reexamination Certificate
active
06999660
ABSTRACT:
Provided is a focusing waveguide grating coupler using a leaky mode which can form single output beam while relieving the dependency on manufacturing processes. The focusing waveguide grating coupler of the present research includes: a substrate having a first refraction index n1; a first core layer having a second refraction index n2, the first core layer being formed on the substrate; a second core layer having a third refraction index n3, the second core layer being formed on the first core layer apart from the first core layer with a space d in between; a first cladding layer having a fourth refraction index n4, the first cladding layer being formed on the second core layer; a second cladding layer having a fifth refraction index n5, the second cladding layer being formed on the first cladding layer and inserted between the first core layer and the second core layer; and a Fresnel lens positioned on the second cladding layer, wherein the refractive indexes satisfy conditions of n5>(n2, n3)>n1 and n5>n4; and light inputted through the first and second core layers to the Fresnel lens as radiated leaky beam by a leaky mode formed according to the conditions, and the leaky beam forms an optical focus by performing single directional coupling.
REFERENCES:
patent: 3982810 (1976-09-01), Tamir et al.
patent: 4779259 (1988-10-01), Kono et al.
patent: 4861128 (1989-08-01), Ishikawa et al.
patent: 5436991 (1995-07-01), Sunagawa et al.
patent: 5657407 (1997-08-01), Li et al.
patent: 6285813 (2001-09-01), Schultz et al.
patent: 6436613 (2002-08-01), Fallahi et al.
Ura, et al., “An Integrated-Optic Disk Pickup Device,” Journal of Lightwave Technology, vol. LT-4, No. 7, Jul. 1986, pp. 913-918.
R. Ulrich, “Efficiency of Optical-Grating Couplers,” Journal of the Optical Society of America, vol. 63, No. 11, Nov. 1973, pp. 1419-1431.
Aoyagi, et al., “High-Efficiency Blazed Grating Couplers,”Applied Physics Letters, vol. 29, No. 5, Sep. 1, 1976, pp. 303-304.
Rancone, et al., “Single-leakage-channel grating couplers: comparison of theoretical and experimental branching ratios,” Optics Letters, vol. 18, No. 22, Nov. 19, 1993, pp. 1919-1921.
Avrutsky, et al., “High-efficiency single-order waveguide grating coupler,” Optics Letters, vol. 15, No. 24, Dec. 15, 1990, pp. 1446-1448.
Sheard, et al., “Focusing waveguide grating coupler using a diffractive doublet,” Applied Optics, vol. 36, No. 19, Jul. 1, 1997, pp. 4349-4353.
Paek Mun-Cheol
Park Yong-woo
Pyo Hyeon-Bong
Ryu Hojun
Sohn Yeungjoon
Blakely & Sokoloff, Taylor & Zafman
Bovernick Rodney
Electronics and Telecommunications Research Institute
Stahl Mike
LandOfFree
Highly efficient focusing waveguide grating coupler using... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Highly efficient focusing waveguide grating coupler using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Highly efficient focusing waveguide grating coupler using... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3698173