Patents by Inventor Hanan Anis
Hanan Anis 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: 8879058Abstract: A miniaturized imaging system is provided that operates in multiple modes, including a coherent anti-stokes Raman scattering (CARS) mode. The imaging system includes: a laser delivery subsystem that generates an excitation signal; a scanning mechanism configured to receive the excitation signal from the laser delivery subsystem and direct the excitation signal through an optics subsystem onto a sample, such that the optics subsystem compensates for chromatic aberration in the excitation signal; and a dichroic mirror that receives emission from the sample in a backward direction and directs the emission along a collection path to a detector. The light source for the laser delivery subsystem may be a single femtosecond pulse laser.Type: GrantFiled: November 4, 2011Date of Patent: November 4, 2014Assignee: The University of OttawaInventors: Sangeeta Murugkar, Peter K. Stys, Hanan Anis
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Publication number: 20120281211Abstract: A miniaturized imaging system is provided that operates in multiple modes, including a coherent anti-stokes Raman scattering (CARS) mode. The imaging system includes: a laser delivery subsystem that generates an excitation signal; a scanning mechanism configured to receive the excitation signal from the laser delivery subsystem and direct the excitation signal through an optics subsystem onto a sample, such that the optics subsystem compensates for chromatic aberration in the excitation signal; and a dichroic mirror that receives emission from the sample in a backward direction and directs the emission along a collection path to a detector. The light source for the laser delivery subsystem may be a single femtosecond pulse laser.Type: ApplicationFiled: November 4, 2011Publication date: November 8, 2012Applicant: UNIVERSITY OF OTTAWAInventors: Sangeeta Murugkar, Peter K. Stys, Hanan Anis
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Publication number: 20120033686Abstract: A mode-locked fiber laser system is presented with an improved optical cavity structure having a lower doped and longer gain medium. The laser system comprises: a laser source operable to produce a light beam; an optical cavity structure operable to amplify a light beam propagating therethrough; and a beam splitter operable to output the amplified light beam from the optical cavity. The optical cavity includes a single-mode fiber section and a gain fiber section doped with a lanthanide element, such as erbium or ytterbium, where the ratio between length of the gain fiber section to a total length of the cavity structure is greater than 1:5. By increasing length of the gain medium, peak power of the generated pulse is increased while keeping the nonlinear phase shift constant to avoid optical wave breaking.Type: ApplicationFiled: January 28, 2011Publication date: February 9, 2012Applicant: The University of OttawaInventors: Mohamed A. Abdelalim, Hanan Anis, Diaa Abdel-Maguid Mohamed Khalil
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Patent number: 7907844Abstract: A method is provided for routing optical signals in an optical transport network. The method includes: separating an incoming optical multiplexed signal having a plurality of wavelength-channels embodied therein into two or more channel groups, where each channel group has a subset of the wavelength-channels and channels to be routed hitlessly in a given channel group are adjacent to a channel free region; providing a wavelength selective element for each wavelength-channel to be routed hitlessly; and routing a given wavelength-channel by tuning the corresponding wavelength selective element to either the given wavelength-channel or a channel free region adjacent to the given wavelength-channel. Providing a channel free region next to each channel to be routed allows the use of inexpensive tunable elements, which typically cause hits as they tune, to effect hitless routing.Type: GrantFiled: October 25, 2007Date of Patent: March 15, 2011Assignee: University of OttawaInventors: Daniel Levner, Francois Boudreault, Hanan Anis
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Patent number: 7738097Abstract: A method is provided for biosensing using a photonic crystal fiber having a hollow core. The method includes: designating an analyte of interest; determining a wavelength for an excitation light source which generates a Raman spectrum when incident upon the analyte of interest; selecting a photonic crystal fiber that would guide the light when the fiber is non-selectively filled with a solvent hosting the analyte of interest; non-selectively filling a photonic crystal fiber with the solvent hosting the analyte of interest; interrogating the analyte of interest by coupling light from the light source to the photonic crystal fiber; and analyzing the light output from the photonic crystal fiber for Raman fingerprints.Type: GrantFiled: July 16, 2008Date of Patent: June 15, 2010Assignee: University of OttawaInventors: Altaf Khetani, Majid Naji, Neil Lagali, Hanan Anis, Rejean Munger
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Patent number: 7706688Abstract: The invention provides a unified optical network architecture for metro and access communication networks, wherein a metro ring network interfaces access PONs through one or more reconfigurable Optical Add/Drop Multiplexers to provide wavelength-reconfigurable all-optical transmission of communication signals from the metro ring network to designated optical network units associated with the end-users, and wherein one metro hub located in the metro ring network is utilized to set transmission wavelengths and timing for both downstream and upstream signal transmission for multiple access PONs.Type: GrantFiled: July 16, 2007Date of Patent: April 27, 2010Assignee: University of OttawaInventors: Francois Boudreault, Hanan Anis, S. Richard Pramod
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Publication number: 20100014077Abstract: A method is provided for biosensing using a photonic crystal fiber having a hollow core. The method includes: designating an analyte of interest; determining a wavelength for an excitation light source which generates a Raman spectrum when incident upon the analyte of interest; selecting a photonic crystal fiber that would guide the light when the fiber is non-selectively filled with a solvent hosting the analyte of interest; non-selectively filling a photonic crystal fiber with the solvent hosting the analyte of interest; interrogating the analyte of interest by coupling light from the light source to the photonic crystal fiber; and analyzing the light output from the photonic crystal fiber for Raman fingerprints.Type: ApplicationFiled: July 16, 2008Publication date: January 21, 2010Applicant: THE UNIVERSITY OF OTTAWAInventors: Altaf Khetani, Majid Naji, Neil Lagali, Hanan Anis, Rejean Munger
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Patent number: 7542137Abstract: The invention provides a system and method for automatic real-time monitoring for the presence of a pathogen in water using coherent anti-stokes Raman scattering (CARS) microscopy. Water sample trapped in a trapping medium is provided to a CARS imager. CARS images are provided to a processor for automatic analyzing for the presence of image artifacts having pre-determined features characteristic to the pathogen. If a match is found, a CARS spectrum is taken and compared to a stored library of reference pathogen-specific spectra for pathogen identification. The system enables automatic pathogen detection in flowing water in real time.Type: GrantFiled: July 23, 2007Date of Patent: June 2, 2009Assignees: University of Ottawa, President and Fellows of Harvard CollegeInventors: Sangeeta Murugkar, Hanan Anis, Xiaoliang Sunney Xie, Conor Evans
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Publication number: 20090110396Abstract: A method is provided for routing optical signals in an optical transport network. The method includes: separating an incoming optical multiplexed signal having a plurality of wavelength-channels embodied therein into two or more channel groups, where each channel group has a subset of the wavelength-channels and channels to be routed hitlessly in a given channel group are adjacent to a channel free region; providing a wavelength selective element for each wavelength-channel to be routed hitlessly; and routing a given wavelength-channel by tuning the corresponding wavelength selective element to either the given wavelength-channel or a channel free region adjacent to the given wavelength-channel. Providing a channel free region next to each channel to be routed allows the use of inexpensive tunable elements, which typically cause hits as they tune, to effect hitless routing.Type: ApplicationFiled: October 25, 2007Publication date: April 30, 2009Inventors: Daniel Levner, Francois Boudreault, Hanan Anis
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Publication number: 20080059135Abstract: The invention provides a system and method for automatic real-time monitoring for the presence of a pathogen in water using coherent anti-stokes Raman scattering (CARS) microscopy. Water sample trapped in a trapping medium is provided to a CARS imager. CARS images are provided to a processor for automatic analyzing for the presence of image artifacts having pre-determined features characteristic to the pathogen. If a match is found, a CARS spectrum is taken and compared to a stored library of reference pathogen-specific spectra for pathogen identification. The system enables automatic pathogen detection in flowing water in real time.Type: ApplicationFiled: July 23, 2007Publication date: March 6, 2008Inventors: Sangeeta Murugkar, Hanan Anis, Xiaoliang Xie, Conor Evans
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Publication number: 20080013950Abstract: The invention provides a unified optical network architecture for metro and access communication networks, wherein a metro ring network interfaces access PONs through one or more reconfigurable Optical Add/Drop Multiplexers to provide wavelength-reconfigurable all-optical transmission of communication signals from the metro ring network to designated optical network units associated with the end-users, and wherein one metro hub located in the metro ring network is utilized to set transmission wavelengths and timing for both downstream and upstream signal transmission for multiple access PONs.Type: ApplicationFiled: July 16, 2007Publication date: January 17, 2008Inventors: Francois Boudreault, Hanan Anis, S. Richard Pramod
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Patent number: 7254336Abstract: A method is provided for seamless migration from a scaleable optical add/drop multiplexer to a network switching node in an optical transport network. The method includes: providing a pre-deployed optical add/drop multiplexer (OADM) at a network node in the optical transport network; introducing an additional optical add/drop multiplexer (OADM) at the network node; and interconnecting the pre-deployed OADM to the additional OADM using a photonic cross-connect switch, where the photonic cross-connect switch is operable to route optical signals amongst the optical transport lines connected to the pre-deployed OADM and the upgraded OADM.Type: GrantFiled: January 22, 2003Date of Patent: August 7, 2007Assignee: Altera CorporationInventors: Gordon Harney, Jonathan Bosloy, Hanan Anis, Reza Paiam, John Gruber
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Patent number: 7099597Abstract: An iterative process is used to set the phase prechirp of a WDM optical transport system to a system's optimal level that maximizes the signal quality. A signal degradation factor takes into account linear and non-linear effects along the optical path and is used as a receive end feedback signal to control the phase prechirp level at the transmitter site. By using the FEC corrected errors rate as the feedback signal, optimization of signal quality is performed even when the system is running error free. By using an adaptive phase prechirp transmitter, signal degradation compensation can be also performed on a per wavelength basis to compensate for the residual dispersion slope and to allow optimization of individual channels independently of the net link dispersion value.Type: GrantFiled: August 10, 2001Date of Patent: August 29, 2006Assignee: PTS CorporationInventors: Ross Alexander Saunders, Rajkumar Nagarajan, Hanan Anis, Andrew Robinson, Sacha Corbeil
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Patent number: 6999681Abstract: A method is provided for seamless migration from static to agile optical networking at a network switching node in an optical transport network. The seamless method includes: providing an optical signal splitter at the input of thenetwork switching node, the signal splitter being adapted to receive an optical multiplexed signal having a plurality of data signals and at least one data signal being agile; providing an optical signal combiner at the output of the network switching node; and introducing a photonic cross-connect switch between the signal splitter and the signal combiner, where the photonic switch is operable to switch the agile data signals.Type: GrantFiled: January 23, 2002Date of Patent: February 14, 2006Assignee: PTS CorporationInventors: John Gruber, Jonathan Bosloy, Hanan Anis, Raza Paiam
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Publication number: 20040208548Abstract: A method is provided for seamless migration from static to agile optical networking at a network switching node in an optical transport network. The seamless method includes: providing an optical signal splitter at the input of the network switching node, the signal splitter being adapted to receive an optical multiplexed signal having a plurality of data signals and at least one data signal being agile; providing an optical signal combiner at the output of the network switching node; and introducing a photonic cross-connect switch between the signal splitter and the signal combiner, where the photonic switch is operable to switch the agile data signals.Type: ApplicationFiled: January 23, 2002Publication date: October 21, 2004Inventors: John Gruber, Jonathan Bosloy, Hanan Anis, Raza Paiam
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Publication number: 20040208608Abstract: A dispersion compensation architecture for a switch-ready optical network includes an identified, switch-ready optical network region having a maximum propagation length, a dispersion section of the region having a section length, and dispersion compensation measures operably applied to said dispersion section, wherein the dispersion compensation measures are selected based on at least one determined regional target value of regional aggregated dispersion, the section length, and the maximum propagation length.Type: ApplicationFiled: June 24, 2002Publication date: October 21, 2004Inventors: Alex Tager, John Gruber, Hanan Anis, Andrew Robinson, Ross Saunders
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Publication number: 20030175029Abstract: A method is provided for seamless migration from a scaleable optical add/drop multiplexer to a network switching node in an optical transport network. The method includes: providing a pre-deployed optical add/drop multiplexer (OADM) at a network node in the optical transport network; introducing an additional optical add/drop multiplexer (OADM) at the network node; and interconnecting the pre-deployed OADM to the additional OADM using a photonic cross-connect switch, where the photonic cross-connect switch is operable to route optical signals amongst the optical transport lines connected to the pre-deployed OADM and the upgraded OADM.Type: ApplicationFiled: January 22, 2003Publication date: September 18, 2003Inventors: Gordon Harney, Jonathan Bosloy, Hanan Anis, Reza Paiam, John Gruber
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Publication number: 20030039003Abstract: An architectural arrangement is provided for launching an optical system signal into an optical transport network, where the optical system signal is constituted in a layered membership relationship that defines at least two optical layers. The architectural arrangement includes a multiplexing component connected to an optical transport line residing in the optical transport network and a plurality of signal impairment compensation mechanisms associated with the multiplexing component. The multiplexing component is operable to receive a plurality of optical data signals therein, combine the plurality of optical data signals to form the optical system signal and launch the optical system signal into the optical transport line. The signal impairment compensation mechanisms are operable across each of the optical layers of the optical system signal to perform a signal impairment compensation operation on optical signal therein.Type: ApplicationFiled: October 31, 2001Publication date: February 27, 2003Inventors: Bogdan Jakobik, John Gruber, Gordon Harney, Alex Tager, Ross Saunders, Hanan Anis, John Harvey, Avid Lemus
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Patent number: 6486990Abstract: A sub-harmonic clock signal is provided in a series of soliton optical pulses that are transmitted at a given line rate in a soliton optical transmission system. The line rate defines time slots of equal duration. Each soliton optical pulse in every N time slots is modulated in a manner to make the pulse distinguishable from pulses in other time slots. The frequency of the sub-harmonic clock signal is equal to the line rate divided by N. This technique of providing a clock signal allows simple recovery of the clock signal using a PIN diode photo detector and a bandpass filter of appropriate bandwidth.Type: GrantFiled: December 18, 1998Date of Patent: November 26, 2002Assignee: Nortel Networks LimitedInventors: Kim Byron Roberts, Hanan Anis, Maurice S. O'Sullivan
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Publication number: 20020039217Abstract: An iterative process is used to set the phase prechirp of a WDM optical transport system to a system's optimal level that maximizes the signal quality. A signal degradation factor takes into account linear and non-linear effects along the optical path and is used as a receive end feedback signal to control the phase prechirp level at the transmitter site. By using the FEC corrected errors rate as the feedback signal, optimization of signal quality is performed even when the system is running error free. By using an adaptive phase prechirp transmitter, signal degradation compensation can be also performed on a per wavelength basis to compensate for the residual dispersion slope and to allow optimization of individual channels independently of the net link dispersion value.Type: ApplicationFiled: August 10, 2001Publication date: April 4, 2002Inventors: Ross Alexander Saunders, Rajkumar Nagarajan, Hanan Anis, Andrew Robinson, Sacha Corbeil