Patents by Inventor Syed H. Murshid
Syed H. Murshid 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: 11201678Abstract: A modified optical PAM communication system using multiple laser sources to generate each amplitude level. The systems can be applied separately or in conjunction with another modulation system such as SDM, MDM, WDM, TDM, or other communication systems. In an embodiment, a PAM-4 system will increase data rate by a factor of two, but more complicated schemes using more lasers can be utilized to generate higher efficiency schemes. For example, a 25 Gbps NRZ signal will give 50 Gbps PAM-4 signal and higher laser systems can generate PAM-8 or PAM-16 for 75 and 100 Gbps systems respectively. These can be further applied to SDM systems to generate higher data rates equivalent to the number of SDM channels multiplied by the PAM efficiency. In embodiments, the invention may combing PAM with WDM and SDM to achieve multiple bits per symbol.Type: GrantFiled: November 24, 2020Date of Patent: December 14, 2021Inventors: Syed H. Murshid, Greg Lovell, Bilas Chowdhury, Ce Su, Han Wang, Rayan Enaya, Engin Eyceyurt
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Publication number: 20210152252Abstract: A modified optical PAM communication system using multiple laser sources to generate each amplitude level. The systems can be applied separately or in conjunction with another modulation system such as SDM, MDM, WDM, TDM, or other communication systems. In an embodiment, a PAM-4 system will increase data rate by a factor of two, but more complicated schemes using more lasers can be utilized to generate higher efficiency schemes. For example, a 25 Gbps NRZ signal will give 50 Gbps PAM-4 signal and higher laser systems can generate PAM-8 or PAM-16 for 75 and 100 Gbps systems respectively. These can be further applied to SDM systems to generate higher data rates equivalent to the number of SDM channels multiplied by the PAM efficiency. In embodiments, the invention may combing PAM with WDM and SDM to achieve multiple bits per symbol.Type: ApplicationFiled: November 24, 2020Publication date: May 20, 2021Applicant: Florida Institute of Technology, Inc.Inventors: Syed H. Murshid, Greg Lovell, Bilas Chowdhury, Ce Su, Han Wang, Rayan Enaya, Engin Eyceyurt
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Patent number: 10998980Abstract: A modified optical PAM communication system using multiple laser sources to generate each amplitude level. The systems can be applied separately or in conjunction with another modulation system such as SDM, MDM, WDM, TDM, or other communication systems. In an embodiment, a PAM-4 system will increase data rate by a factor of two, but more complicated schemes using more lasers can be utilized to generate higher efficiency schemes. For example, a 25 Gbps NRZ signal will give 50 Gbps PAM-4 signal and higher laser systems can generate PAM-8 or PAM-16 for 75 and 100 Gbps systems respectively. These can be further applied to SDM systems to generate higher data rates equivalent to the number of SDM channels multiplied by the PAM efficiency. In embodiments, the invention may combing PAM with WDM and SDM to achieve multiple bits per symbol.Type: GrantFiled: March 27, 2019Date of Patent: May 4, 2021Assignee: Florida Institute of Technology, Inc.Inventors: Syed H. Murshid, Greg Lovell, Bilas Chowdhury, Ce Su, Han Wang, Rayan Enaya, Engin Eyceyurt
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Publication number: 20190356391Abstract: A modified optical PAM communication system using multiple laser sources to generate each amplitude level. The systems can be applied separately or in conjunction with another modulation system such as SDM, MDM, WDM, TDM, or other communication systems. In an embodiment, a PAM-4 system will increase data rate by a factor of two, but more complicated schemes using more lasers can be utilized to generate higher efficiency schemes. For example, a 25 Gbps NRZ signal will give 50 Gbps PAM-4 signal and higher laser systems can generate PAM-8 or PAM-16 for 75 and 100 Gbps systems respectively. These can be further applied to SDM systems to generate higher data rates equivalent to the number of SDM channels multiplied by the PAM efficiency. In embodiments, the invention may combing PAM with WDM and SDM to achieve multiple bits per symbol.Type: ApplicationFiled: March 27, 2019Publication date: November 21, 2019Applicant: Florida Institute of Technology, Inc.Inventors: Syed H. Murshid, Greg Lovell, Bilas Chowdhury, Ce Su, Han Wang, Rayan Enaya, Engin Eyceyurt
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Patent number: 9712239Abstract: A multiplexed optical communication system comprising a carrier optical fiber, a plurality of launching light sources, and a matching plurality of multiplexer/demultiplexers and photodetectors is described and claimed. Optical communication channel separation by Spatial Domain Multiplexing (SDM), Optical Angular Momentum (OAM) multiplexing, and Wavelength Division Multiplexing (WDM) is used in combination to achieve significant increase in optical communication channel bandwidth over the prior art. The launching light sources may be positioned such that the light beams are incident on the receiving end of the carrier optical fiber at desired angles including complementary angles. Crosstalk between optical communication channels is minimal. The communication bandwidth of a TDM system may be increased by an order of magnitude due the layered WDM/SDM/OAM data multiplexing of the invention.Type: GrantFiled: February 8, 2016Date of Patent: July 18, 2017Assignee: Florida Institute of Technology, Inc.Inventors: Syed H. Murshid, Saud Alanzi, Bilas Chowdhury
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Patent number: 9529147Abstract: An optical-to-optical inline spatial domain multiplexing (SDM) de-multiplexer for SDM communication comprising a plurality of concentric core layers each having a beveled output end and a cladding layer concentrically surrounding each core layer. The cladding layer has an index that is lower than the index of the core layer it surrounds. Also included is a system for SDM communication comprising at least one optical source to transmit optical energy, an SDM optical carrier fiber to receive optical energy from the source and output a plurality of SDM signals, a SDM de-multiplexer as described above wherein the SDM signals output from the carrier fiber are each incident upon one of the core layers, optical output fibers positioned to couple SDM signals from each cladding layer, and a photodetector communicatively coupled to the outputs of the optical output fibers to couple the SDM signals output from the optical output fibers.Type: GrantFiled: April 29, 2015Date of Patent: December 27, 2016Assignee: Florida Institute of Technology, Inc.Inventors: Syed H. Murshid, Gregory L. Lovell
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Patent number: 9515729Abstract: A free space optical receiver comprising a photodetector and a fiber bundle. The fiber bundle comprises a plurality of optical fibers splayed apart at one of their ends to receive free space optical energy from multiple directions. The splayed apart ends of the plurality of optical fibers may create a hemispherical shape. Each of the plurality of optical fibers has an acceptance cone for which it couples optical energy into the splayed end of the optical fiber. The acceptance cones of the splayed ends of the plurality of optical fibers may overlap to form an omnidirectional acceptance zone. The other, non-splayed ends of the plurality of optical fibers are communicatively coupled to the photodetector, which is positioned to receive the free space optical energy from the non-splayed ends of the plurality of optical fibers. An optical communication system including the free space optical receiver is also described.Type: GrantFiled: April 29, 2015Date of Patent: December 6, 2016Assignee: Florida Institute of Technology, Inc.Inventors: Syed H. Murshid, Michael F. Finch
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Publication number: 20160233959Abstract: A multiplexed optical communication system comprising a carrier optical fiber, a plurality of launching light sources, and a matching plurality of multiplexer/demultiplexers and photodetectors is described and claimed. Optical communication channel separation by Spatial Domain Multiplexing (SDM), Optical Angular Momentum (OAM) multiplexing, and Wavelength Division Multiplexing (WDM) is used in combination to achieve significant increase in optical communication channel bandwidth over the prior art. The launching light sources may be positioned such that the light beams are incident on the receiving end of the carrier optical fiber at desired angles including complementary angles. Crosstalk between optical communication channels is minimal. The communication bandwidth of a TDM system may be increased by an order of magnitude due the layered WDM/SDM/OAM data multiplexing of the invention.Type: ApplicationFiled: February 8, 2016Publication date: August 11, 2016Applicant: Florida Institute of Technology, Inc.Inventors: Syed H. Murshid, Saud Alanzi, Bilas Chowdhury
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Publication number: 20150333828Abstract: A free space optical receiver comprising a photodetector and a fiber bundle. The fiber bundle comprises a plurality of optical fibers splayed apart at one of their ends to receive free space optical energy from multiple directions. The splayed apart ends of the plurality of optical fibers may create a hemispherical shape. Each of the plurality of optical fibers has an acceptance cone for which it couples optical energy into the splayed end of the optical fiber. The acceptance cones of the splayed ends of the plurality of optical fibers may overlap to form an omnidirectional acceptance zone. The other, non-splayed ends of the plurality of optical fibers are communicatively coupled to the photodetector, which is positioned to receive the free space optical energy from the non-splayed ends of the plurality of optical fibers. An optical communication system including the free space optical receiver is also described.Type: ApplicationFiled: April 29, 2015Publication date: November 19, 2015Applicant: FLORIDA INSTITUTE OF TECHNOLOGY, INC.Inventors: Syed H. Murshid, Michael F. Finch
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Publication number: 20150309249Abstract: An optical-to-optical inline spatial domain multiplexing (SDM) de-multiplexer for SDM communication comprising a plurality of concentric core layers each having a beveled output end and a cladding layer concentrically surrounding each core layer. The cladding layer has an index that is lower than the index of the core layer it surrounds. Also included is a system for SDM communication comprising at least one optical source to transmit optical energy, an SDM optical carrier fiber to receive optical energy from the source and output a plurality of SDM signals, a SDM de-multiplexer as described above wherein the SDM signals output from the carrier fiber are each incident upon one of the core layers, optical output fibers positioned to couple SDM signals from each cladding layer, and a photodetector communicatively coupled to the outputs of the optical output fibers to couple the SDM signals output from the optical output fibers.Type: ApplicationFiled: April 29, 2015Publication date: October 29, 2015Applicant: FLORIDA INSTITUTE OF TECHNOLOGY, INC.Inventors: Syed H. Murshid, Gregory L. Lovell
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Patent number: 8396371Abstract: Multiple light beams are launched into a single optical fiber, each respective light beam with a corresponding signal. Each of the respective multi-beams are separated by launching each of the light at a different incidence angle and/or input position, into the optical fiber. In this way, each light beam is able to propagate independently according to its own trajectory inside the fiber. The resultant multi light beams propagate with respective counter cyclical orbital angular momentum with respective helical paths.Type: GrantFiled: August 11, 2010Date of Patent: March 12, 2013Assignee: Florida Institute of TechnologyInventors: Syed H. Murshid, Azhar M. Khayrattee
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Publication number: 20110150464Abstract: Multiple light beams are launched into a single optical fiber, each respective light beam with a corresponding signal. Each of the respective multi-beams are separated by launching each of the light at a different incidence angle and/or input position, into the optical fiber. In this way, each light beam is able to propagate independently according to its own trajectory inside the fiber. The resultant multi light beams propagate with respective counter cyclical orbital angular momentum with respective helical paths.Type: ApplicationFiled: August 11, 2010Publication date: June 23, 2011Applicant: Florida Institute of TechnologyInventors: Syed H. Murshid, Azhar M. Khayrattee
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Patent number: 6886365Abstract: The method for making the fiber optic Fabry-Perot sensor includes securing an optical fiber to a substrate, and forming at least one gap in the optical fiber after the optical fiber is secured to the substrate to define at least one pair of self-aligned opposing spaced apart optical fiber end faces for the Fabry-Perot sensor. Preferably, an adhesive directly secures the at least one pair of optical fiber portions to the substrate. The opposing spaced apart optical fiber end faces are self-aligned because the pair of optical fiber end portions are formed from a single fiber which has been directly secured to the substrate. Also, each of the self-aligned spaced apart optical fiber end faces may be substantially rounded due to an electrical discharge used to form the gap. This results in integral lenses being formed as the end faces of the fiber portions.Type: GrantFiled: November 4, 2002Date of Patent: May 3, 2005Assignee: Harris CorporationInventors: Raymond C. Rumpf, Syed H. Murshid
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Patent number: 6801678Abstract: A fiber optic liquid level detector uses optical fibers to detect the presence or absence of liquids. The waveguide properties of optical fibers tends to deviate from the normal dielectric interfaces so that a fiber immersed in a liquid has a reflection coefficient smaller than when surrounded by air. This is caused by the differences in refractive indices of liquid and air and is used to measure the amount of light transmitted or reflected by the fiber in the preserve or absence of a liquid.Type: GrantFiled: August 13, 2003Date of Patent: October 5, 2004Assignee: Florida Institute of TechnologyInventor: Syed H. Murshid
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Publication number: 20040086228Abstract: The method for making the fiber optic Fabry-Perot sensor includes securing an optical fiber to a substrate, and forming at least one gap in the optical fiber after the optical fiber is secured to the substrate to define at least one pair of self-aligned opposing spaced apart optical fiber end faces for the Fabry-Perot sensor. Preferably, an adhesive directly secures the at least one pair of optical fiber portions to the substrate. The opposing spaced apart optical fiber end faces are self-aligned because the pair of optical fiber end portions are formed from a single fiber which has been directly secured to the substrate. Also, each of the self-aligned spaced apart optical fiber end faces may be substantially rounded due to an electrical discharge used to form the gap. This results in integral lenses being formed as the end faces of the fiber portions.Type: ApplicationFiled: November 4, 2002Publication date: May 6, 2004Applicant: Harris Corporation and Florida Institute of TechnologyInventors: Raymond C. Rumpf, Syed H. Murshid
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Publication number: 20040036043Abstract: A fiber optic liquid level detector uses optical fibers to detect the presence or absence of liquids. The waveguide properties of optical fibers tends to deviate from the normal dielectric interfaces so that a fiber immersed in a liquid has a reflection coefficient smaller than when surrounded by air. This is caused by the differences in refractive indices of liquid and air and is used to measure the amount of light transmitted or reflected by the fiber in the preserve or absence of a liquid.Type: ApplicationFiled: August 13, 2003Publication date: February 26, 2004Inventor: Syed H. Murshid