The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2001
Filed:
Mar. 18, 1999
Hideo Kosaka, Tokyo, JP;
Shojiro Kawakami, Miyagi, JP;
NEC Corporation, Tokyo, JP;
Abstract
A wavelength dividing circuit which realizes improved device characteristics and performance, such as a small size, high speed and high transmission efficiency and which lends itself to improved integration degree. A wavelength dividing circuit in which materials of different refractive indices are arrayed periodically, without forming individual waveguides as in conventional AWG, in order to create strong wavelength dispersion characteristics not possible with an ordinary optical crystal to control wavelength deviation. A substrate,having atomic mediums,buried in a background medium,in a two-dimensional triangular array has its both sides sandwiched by a first clad,and a second clad,Optical signals fall on an incident surface inclined at a certain angle relative to the light incident direction and is radiated from a light outgoing surface,The interval between neighboring atomic mediums,is designed in meeting with the wavelength of the optical signals, while the thickness of the substrate,is designed so that the optical signals are sufficiently confined in the substrate,and so that the light proceeding direction is not significantly deviated from the substrate surface.