Desmond Lim resumes & CV records
Resumes
Vice President
Industry:
Banking
Work:
Rhb Banking Group
Vice President
Vice President
Desmond Rodney Lim, 54195 Binney St UNIT 1202, Cambridge, MA 02142
Desmond Lim Phones & Addresses
218 Thorndike St, Cambridge, MA 02141 617-4949491
New Providence, NJ
1 Broadway FL 14, Cambridge, MA 02142
Work
Company:
L optics inc
Address:
143 Third St #3, Cambridge, MA 02141
Phones:
617-2125779
Position:
Owner
Industries:
Offices of Bank Holding Companies
Education
Degree:
Associate degree or higher
Mentions for Desmond Rodney Lim
Publications & IP owners
Us Patents
Mode Coupler Between Low Index Difference Waveguide And High Index Difference Waveguide
US Patent:
6631225, Oct 7, 2003
Filed:
Apr 24, 2001
Appl. No.:
09/841464
Inventors:
Kevin K. Lee - Cambridge MA
Kazumi Wada - Lexington MA
Desmond Lim - Cambridge MA
Lionel C. Kimerling - Concord MA
Kazumi Wada - Lexington MA
Desmond Lim - Cambridge MA
Lionel C. Kimerling - Concord MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02B 626
US Classification:
385 28, 385 43, 385 49, 385 50
Abstract:
A mode coupler that enables low-loss coupling between optical modes of two waveguides with different index difference. The mode size and the effective index are gradually changed between two waveguides to gradually transform the mode shape, size, and speed with minimum power loss. The mode coupler is useful for coupling the mode of an optical fiber waveguide with low index difference to the mode of a planar high index difference waveguide, and vice versa.
Optical Micro-Cavity Sensors
US Patent:
6661938, Dec 9, 2003
Filed:
Sep 25, 2001
Appl. No.:
09/963026
Inventors:
Desmond R. Lim - Cambridge MA
Anuradha Agarwal - Weston MA
Lionel C. Kimerling - Concord MA
Anuradha Agarwal - Weston MA
Lionel C. Kimerling - Concord MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02B 600
US Classification:
385 12, 385129
Abstract:
An integrated optical sensor using optical waveguide micro-cavity resonators. Using a laser and a detector it is possible to detect changes in the position of the resonance position, in wavelength or frequency, of one or more modes of the resonator. The change in resonance can be made dependent on chemicals, which have been adsorbed by chemically or biologically sensitive material provided in close proximity to the resonator.
Graded Index Waveguide
US Patent:
6690871, Feb 10, 2004
Filed:
Jun 27, 2001
Appl. No.:
09/893263
Inventors:
Kevin K. Lee - Cambridge MA
Desmond Lim - Cambridge MA
Kazumi Wada - Lexington MA
Lionel C. Kimerling - Concord MA
Desmond Lim - Cambridge MA
Kazumi Wada - Lexington MA
Lionel C. Kimerling - Concord MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02B 610
US Classification:
385129, 385124, 385125, 385126
Abstract:
A planar waveguide that has a graded index layer at the core/cladding interface to reduce scattering losses due to core/cladding interface roughness. The refractive index at the core/cladding interface is changed from that of the core to that of cladding gradually by having a graded index layer. The graded index layer reduces the scattering of light traveling in the waveguide by reducing the effect of the roughness at the abrupt interface between the core and the cladding. Using a proper design, the graded index layer also minimizes the modal and polarization dispersion of the optical mode traveling in the waveguide.
Mode Transformer Between Low Index Difference Waveguide And High Index Difference Waveguide
US Patent:
6697551, Feb 24, 2004
Filed:
Jun 26, 2001
Appl. No.:
09/978310
Inventors:
Kevin K. Lee - Cambridge MA
Kazumi Wada - Lexington MA
Desmond Lim - Cambridge MA
Lionel C. Kimerling - Concord MA
Kazumi Wada - Lexington MA
Desmond Lim - Cambridge MA
Lionel C. Kimerling - Concord MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02B 626
US Classification:
385 28, 385 43, 385132
Abstract:
A mode transformer that enables low-loss coupling between optical modes of two waveguides with different index difference. The mode size and the effective index are gradually changed between two waveguides to gradually transform the mode shape, size, and speed with minimum power loss. The mode transformer is useful for coupling the mode of an optical fiber waveguide with low index difference to the mode of a planar high index difference waveguide, and vice versa.
Methods Of Altering The Resonance Of Waveguide Micro-Resonators
US Patent:
6751368, Jun 15, 2004
Filed:
Sep 21, 2001
Appl. No.:
09/961573
Inventors:
Desmond R. Lim - Cambridge MA
Kevin K. Lee - Cambridge MA
Lionel C. Kimerling - Concord MA
Kevin K. Lee - Cambridge MA
Lionel C. Kimerling - Concord MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02B 612
US Classification:
385 14
Abstract:
Methods of tuning, switching or modulating, or, in general, changing the resonance of waveguide micro-resonators. Changes in the resonance can be brought about, permanently or temporarily, by changing the size of the micro-resonator with precision, by changing the local physical structure of the device or by changing the effective and group indices of refraction of the mode in the micro-resonator. Further changing the asymmetry of the index profile around a waveguide can alter the birefringence of the waveguide and allows one to control the polarization in the waveguide. This change in index profile may be used to change the polarization dependence or birefringence of the resonators.
Low-Loss Waveguide And Method Of Making Same
US Patent:
6850683, Feb 1, 2005
Filed:
Jun 7, 2001
Appl. No.:
09/876392
Inventors:
Kevin K. Lee - Cambridge MA, US
Desmond R. Lim - Cambridge MA, US
Kazumi Wada - Lexington MA, US
Lionel C. Kimerling - Concord MA, US
Desmond R. Lim - Cambridge MA, US
Kazumi Wada - Lexington MA, US
Lionel C. Kimerling - Concord MA, US
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02B 610
US Classification:
385129, 385130, 385131, 385132, 65386, 216 24
Abstract:
A method of reducing the scattering losses that involves smoothing of the core/cladding interface and/or change of waveguide geometry in high refractive index difference waveguides. As an example, the SOI-based Si/SiOwaveguides are subjected to an oxidation reaction at high temperatures, after the waveguide patterning process. By oxidizing the rough silicon core surfaces after the patterning process, the core/cladding interfaces are smoothened, reducing the roughness scattering in waveguides.
High Density Integrated Optical Chip With Low Index Difference And High Index Difference Waveguide Functions
US Patent:
6915029, Jul 5, 2005
Filed:
Mar 7, 2003
Appl. No.:
10/384503
Inventors:
Kevin K. Lee - Cambridge MA, US
Desmond R. Lim - Cambridge MA, US
Desmond R. Lim - Cambridge MA, US
Assignee:
LNL Technologies, Inc. - Cambridge MA
International Classification:
G02B006/12
US Classification:
385 14, 385 31, 385 32, 385 49, 385 42, 385 89, 385 92, 385129, 385130, 385 43, 385131, 385132, 385 27, 385 28
Abstract:
The invention features a programmable optical chip. The optical chip has a plurality of optical functions, each of which is connected to a waveguide having a core and a cladding. A photosensitive layer is disposed between at least three of the waveguides, and the photosensitive layer has a refractive index similar to that of the cladding prior to exposure to irradiation. The photosensitive layer changes refractive index upon exposure to irradiation to selectively form an optical connection between at least two of the waveguides.
Methods Of Altering The Resonance Of Waveguide Micro-Resonators
US Patent:
6925226, Aug 2, 2005
Filed:
Aug 1, 2003
Appl. No.:
10/632247
Inventors:
Desmond R. Lim - Cambridge MA, US
Lionel C. Kimerling - Concord MA, US
Lionel C. Kimerling - Concord MA, US
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02B006/26
US Classification:
385 32, 385 4, 385 24, 385 39, 385129
Abstract:
Methods of tuning, switching or modulating, or, in general, changing the resonance of waveguide micro-resonators. Changes in the resonance can be brought about, permanently or temporarily, by changing the size of the micro-resonator with precision, by changing the local physical structure of the device or by changing the effective and group indices of refraction of the mode in the micro-resonator. Further changing the asymmetry of the index profile around a waveguide can alter the birefringence of the waveguide and allows one to control the polarization in the waveguide. This change in index profile may be used to change the polarization dependence or birefringence of the resonators.
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