Patents by Inventor Joseph Vanniasinkam
Joseph Vanniasinkam has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7661889Abstract: The present invention provides an apparatus for multiplexing a plurality of light waves with different wavelengths. The apparatus includes a laser sub-assembly, a multiplexer sub-assembly, and a receptacle sub-assembly. The laser sub-assembly includes a plurality of lasers for radiating a plurality of light waves of different wavelengths. The plurality of light waves are multiplexed in the multiplexer sub-assembly. The multiplexed light waves are coupled to an optical fiber by the receptacle sub-assembly.Type: GrantFiled: April 14, 2006Date of Patent: February 16, 2010Assignee: Beam Express IncInventors: Lijun Zhu, Jignesh H. Shah, Hairo Hu, Yaogeng Ding, Joseph Vanniasinkam
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Patent number: 7397988Abstract: A grating based demultiplexer module is described. The module includes an integrally formed first section, second section, and third section. The first section includes a diffraction grating formed on the surface of the first section and directs a WDM beam onto the internal surface of the diffraction grating. The third section is positioned to receive angularly separated light from the external surface of the diffraction grating. In some embodiments, the third section can direct individualy beams of the angularly separated light onto the surface of optical detectors. The third section provides structural support and maintains the alignment between the first section and the third section.Type: GrantFiled: June 16, 2006Date of Patent: July 8, 2008Assignee: Opnext, Inc.Inventors: Joseph Vanniasinkam, Jon Meyer, Christopher Viray, Bor-Long Twu
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Patent number: 7349597Abstract: A grating based demultiplexer module is described. The module includes an integrally formed first section, second section, and third section. The first section includes a diffraction grating formed on the surface of the first section and directs a WDM beam onto the internal surface of the diffraction grating. The third section is positioned to receive angularly separated light from the external surface of the diffraction grating. In some embodiments,the third section can direct individualy beams of the angularly separated light onto the surface of optical detectors. The third section provides structural support and maintains the alignment between the first section and the third section.Type: GrantFiled: December 21, 2001Date of Patent: March 25, 2008Assignee: Opnext, Inc.Inventors: Joseph Vanniasinkam, Jon Meyer, Christopher Viray, Bor-Long Twu
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Publication number: 20070242957Abstract: The present invention provides an apparatus for multiplexing a plurality of light waves with different wavelengths. The apparatus includes a laser sub-assembly, a multiplexer sub-assembly, and a receptacle sub-assembly. The laser sub-assembly includes a plurality of lasers for radiating a plurality of light waves of different wavelengths. The plurality of light waves are multiplexed in the multiplexer sub-assembly. The multiplexed light waves are coupled to an optical fiber by the receptacle sub-assembly.Type: ApplicationFiled: April 14, 2006Publication date: October 18, 2007Applicant: BEAM EXPRESS INC.Inventors: Lijun Zhu, Jignesh Shah, Hairo Hu, Yaogeng Ding, Joseph Vanniasinkam
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Publication number: 20070053690Abstract: Apparatus for demultiplexing a wavelength division multiplexed optical signal comprising a plurality of signals each having a different wavelength. The apparatus comprises a demultiplexer sub-assembly and a multi-channel receiver optical sub-assembly. The demultiplexer sub-assembly comprises a filter block sub-assembly for splitting the input optical signal. The receiver optical sub-assembly comprises an array of photo detectors for converting the optical signals from the filter block sub-assembly into electrical signals. The electrical signals are amplified by amplifier ICs and transmitted through electrical leads. The demultiplexer sub-assembly and the multi-channel receiver optical sub-assembly are actively aligned and fixed together.Type: ApplicationFiled: September 2, 2005Publication date: March 8, 2007Inventors: Lijun Zhu, Grigore Suruceanu, Robert Lombaerde, Jignesh Shah, Joseph Vanniasinkam
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Publication number: 20060244161Abstract: A grating based demultiplexer module is described. The module includes an integrally formed first section, second section, and third section. The first section includes a diffraction grating formed on the surface of the first section and directs a WDM beam onto the internal surface of the diffraction grating. The third section is positioned to receive angularly separated light from the external surface of the diffraction grating. In some embodiments, the third section can direct individualy beams of the angularly separated light onto the surface of optical detectors. The third section provides structural support and maintains the alignment between the first section and the third section.Type: ApplicationFiled: June 16, 2006Publication date: November 2, 2006Inventors: Joseph Vanniasinkam, Jon Meyer, Christopher Viray, Bor-Long Twu
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Publication number: 20050163439Abstract: A receiver optical amplifier assembly (ROSA) is disclosed that provides for greater tolerances in alignment. The ROSA includes a multimode fiber stub to receive a light beam from a single mode optical fiber. The light beam from the multimode fiber stub is focused by a lens system onto the active area of an optical detector chip. The multimode fiber stub acts as a GRIN lens and allows for optimization of the spot size on the active area. Additionally, in some embodiments the return loss characteristics of the ROSA can be greatly improved by including an angled surface on the multimode fiber stub and moving the active area of the optical detector chip off-axis to compensate.Type: ApplicationFiled: January 26, 2004Publication date: July 28, 2005Inventors: Joseph Vanniasinkam, Lijun Zhu
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Patent number: 6870976Abstract: A multiplexer/demultiplexer optical system component that is passively aligned upon assembly is disclosed. The optical system includes a lens block and a mirror-filter block. In some embodiments, optical filters are positioned and epoxyed to the mirror-filter block using a positioning tool. In some embodiments, optical filters are positioned and epoxyed on a support structure which has been etched to receive the optical filters. The mirror-filter block is a block having flat surfaces, one of which is a flat reflecting surface. The lens block is formed by injection molding and includes a barrel for holding and positioning an optical fiber, placement for a collimating lens, and placements for focusing lenses such that, when assembled, light incident on each of the focusing lenses propagates along the optical axis of the focusing lens. In some embodiments, the collimating lens and the focusing lenses are integrally formed with the lens block.Type: GrantFiled: March 13, 2001Date of Patent: March 22, 2005Assignee: Opnext, Inc.Inventors: Yeou-Yen Chen, Joseph Vanniasinkam, Jon Meyer, Chris Carroll, Joseph Wai, Christopher Viray, Bill Reysen, Bor-Long Twu
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Publication number: 20040213519Abstract: A grating based demultiplexer module is described. The module includes an integrally formed first section, second section, and third section. The first section includes a diffraction grating formed on the surface of the first section and directs a WDM beam onto the internal surface of the diffraction grating. The third section is positioned to receive angularly separated light from the external surface of the diffraction grating. In some embodiments, the third section can direct individualy beams of the angularly separated light onto the surface of optical detectors. The third section provides structural support and maintains the alignment between the first section and the third section.Type: ApplicationFiled: December 21, 2001Publication date: October 28, 2004Inventors: Joseph Vanniasinkam, Jon Meyer, Christopher Viray, Bor-Long Twu
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Publication number: 20040101247Abstract: A multiplexer/demultiplexer optical system component that is passively aligned upon assembly is disclosed. The optical system includes a lens block and a mirror-filter block. In some embodiments, optical filters are positioned and epoxyed to the mirror-filter block using a positioning tool. In some embodiments, optical filters are positioned and epoxyed on a support structure which has been etched to receive the optical filters. The mirror-filter block is a block having flat surfaces, one of which is a flat reflecting surface. The lens block is formed by injection molding and includes a barrel for holding and positioning an optical fiber, placement for a collimating lens, and placements for focusing lenses such that, when assembled, light incident on each of the focusing lenses propagates along the optical axis of the focusing lens. In some embodiments, the collimating lens and the focusing lenses are integrally formed with the lens block.Type: ApplicationFiled: March 13, 2001Publication date: May 27, 2004Inventors: Yeou-Yen Chen, Joseph Vanniasinkam, Jon Meyer, Chris Carroll, John Wai, Christopher Viray, Bill Reysen, Bor-Long Twu