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  Photonic device and method for making sameUSPTO Application #: 20070116410Title: Photonic device and method for making same Abstract: A monolithic device for photonically coupling a first optical waveguide to a second optical waveguide, including: an input being optically coupled to the first waveguide; a first portion being optically coupled to the input; a second portion being optically coupled to the first portion; and, an output being optically coupled to the second portion and the second waveguide; wherein, when an optical signal is provided on the first waveguide, a given part of the signal is provided to the second waveguide dependently upon an angle between the first and second portions. At least one of the waveguides may have an amorphous silicon material coating. (end of abstract) Agent: Patent Docket Administrator Lowenstein Sandler P.C. - Roseland, NJ, US Inventor: Martin H. Kwakernaak USPTO Applicaton #: 20070116410 - Class: 385039000 (USPTO) Related Patent Categories: Optical Waveguides, With Optical Coupler, Particular Coupling Structure The Patent Description & Claims data below is from USPTO Patent Application 20070116410. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This Application is a divisional of U.S. patent application Ser. No. 11/068,477, filed Feb. 28, 2005, titled "PHOTONIC DEVICE AND METHOD FOR MAKING SAME", which in turn claims priority of U.S. patent application Ser. Nos. 60/549,029, filed Mar. 1, 2004, titled MODIFIED MULTIMODE INTERFERENCE COUPLERS FOR ARBITRARY COUPLING RATIOS, 60/549,024, filed Mar. 1, 2004, titled WAVEGUIDE ENCAPSULATION WITH HYDROGENATED AMORPHOUS SILICON NITRIDE, and 60/579,383, filed Jun. 14, 2004, entitled ELECTRO-REFRACTIVE LOW LOSS MMI-COUPLED RING RESONATORS, the entire disclosure of each of which is hereby incorporated by reference as if being set forth in its entirety herein. FIELD OF INVENTION [0003] The present invention relates generally to optical systems, and more particularly to photonic devices. BACKGROUND OF THE INVENTION [0004] Micro-optic ring resonators are attractive for active and passive micro-optical circuits. Rings and discs with directional couplers have generally been realized in lateral and vertical geometries. Coupling of ring resonators with multi-mode interference (MMI) couplers has been demonstrated with ridge-type waveguides on InP. Switching has been demonstrated in active discs using electro-absorption. [0005] It is believed to be desirable to provide devices exhibiting lower losses and good reliabilities. SUMMARY OF INVENTION [0006] A monolithic device for photonically coupling a first optical waveguide to a second optical waveguide, including: an input being optically coupled to the first waveguide; a first portion being optically coupled to the input; a second portion being optically coupled to the first portion; and, an output being optically coupled to the second portion and the second waveguide; wherein, when an optical signal is provided on the first waveguide, a given part of the signal is provided to the second waveguide dependently upon an angle between the first and second portions. At least one of the waveguides may have an amorphous silicon material coating. BRIEF DESCRIPTION OF THE FIGURES [0007] Understanding of the present invention will be facilitated by consideration of the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings, wherein like numerals refer to like parts and: [0008] FIG. 1A illustrates a ring resonator according to an aspect of the present invention; [0009] FIG. 1B illustrates a Mach-Zehnder interferometer with a ring resonator in one arm according to an aspect of the present invention; [0010] FIG. 1C illustrates a deeply etched waveguide structure according to an aspect of the present invention; [0011] FIG. 2A illustrates transmission characteristics of a ring resonator, such as that illustrated in FIG. 1A; [0012] FIG. 2B illustrates a group delay characteristic of a ring resonator, such as that illustrated in FIG. 1A; [0013] FIG. 3A illustrates a transmission characteristic of a Mach-Zehnder interferometer with a ring-resonator in one arm, such as that illustrated in FIG. 2A; [0014] FIG. 3B illustrates a modulation gain (i.e., modulation efficiency as compared to that of a straight waveguide of length equal to the ring circumference) of a Mach-Zehnder interferometer with a ring-resonator in one arm, such as that illustrated in FIG. 2A; [0015] FIG. 4 illustrates a schematic of an angled MMI suitable for use with the devices of FIGS. 1A, 1B and 1C according to an aspect of the present invention; [0016] FIG. 5 illustrates bar (solid) and cross (dashed) transmissions of an angled MMI, such as that shown in FIG. 4; [0017] FIG. 6 illustrates an SEM representation of ring-resonators coupled with angled MMIs to access waveguides according to an aspect of the present invention; [0018] FIG. 7 illustrates coupling values for ring-resonators coupled with angled MMIs to access waveguides according to an aspect of the present invention; [0019] FIG. 8 illustrates an SEM cross-section image of deeply etched InGaAsP/InP waveguide encapsulated with hydrogenated amorphous silicon nitride according to an aspect of the present invention; [0020] FIGS. 9 and 10 illustrate charts presenting achievable refractive indices as a function of a ratio of source gases used in a PECVD process; Continue reading... Full patent description for Photonic device and method for making same Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Photonic device and method for making same patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Photonic device and method for making same or other areas of interest. ### Previous Patent Application: Integrated gradient index lenses Next Patent Application: Transceiver/fiber optic connector adaptor with patch cord id reading capability Industry Class: Optical waveguides ### FreshPatents.com Support Thank you for viewing the Photonic device and method for making same patent info. 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