Patents by Inventor Hock Gin Lim
Hock Gin Lim 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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Publication number: 20230283448Abstract: In some implementations, an optical receiver may receive, from an optical transmitter, a signal that is based on a clock of the optical transmitter. The optical receiver may generate a sampling clock signal that is swept over a range of sampling rates. The optical receiver may perform, using the sampling clock signal at a sampling rate of the range of sampling rates, oversampling of the signal to detect transition edges of the signal. The optical receiver may determine that the detected transition edges are indicative of a correspondence between the sampling rate and a data rate of the signal. The optical receiver may terminate sweeping of the sampling clock signal over the range of sampling rates based on the correspondence between the sampling rate and the data rate. The optical receiver may adjust the sampling clock signal to align the sampling clock signal with transition edges of the signal.Type: ApplicationFiled: March 3, 2023Publication date: September 7, 2023Inventors: Hock Gin LIM, Chiachen CHANG
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Patent number: 10904163Abstract: A system may comprise a host device that stores a first application programming interface (API) and a transceiver. The transceiver may comprise a microcontroller unit (MCU) that stores a second API. The second API may be a subset of the first API. The first API and the second API may control different functions of a data-path chip of the transceiver. The MCU may be configured to provide controls and data from the first API through the MCU without operating on the controls and the data and without using the second API.Type: GrantFiled: March 22, 2019Date of Patent: January 26, 2021Assignee: Lumentum Operations LLCInventor: Hock Gin Lim
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Publication number: 20190306081Abstract: A system may comprise a host device that stores a first application programming interface (API) and a transceiver. The transceiver may comprise a microcontroller unit (MCU) that stores a second API. The second API may be a subset of the first API. The first API and the second API may control different functions of a data-path chip of the transceiver. The MCU may be configured to provide controls and data from the first API through the MCU without operating on the controls and the data and without using the second API.Type: ApplicationFiled: March 22, 2019Publication date: October 3, 2019Inventor: Hock Gin LIM
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Patent number: 9246626Abstract: A network operating system NOS for an agile optical network with a plurality of mesh interconnected switching nodes, manages the network using an object-oriented network information model. The model is common to all applications requiring the data stored in the network managed information base. The core model can be expanded for serving specific application areas. The NOS is organized in layers, at the optical module level, connection level and network level. A distributed topology server DTS organizes the physical, logical and topological data defining all network entities as managed objects MO and topology objects TO for constructing a complete network view. The network information model associates a network element NE information model, specified by managed objects MO and a topological information model, specified by topology objects TO.Type: GrantFiled: July 17, 2007Date of Patent: January 26, 2016Assignee: Alcatel LucentInventors: Guy Claude Fortin, Markus Messenschmidt, Jeffrey Kenneth Emery, Hock Gin Lim, Ralph Stemmer
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Publication number: 20150377526Abstract: A thermoelectric cooler (TEC) circuit is provided that includes a power supply, a TEC, and an H-bridge. The H-bridge, which is coupled to the power supply and ground, controls a direction of current through the TEC. The H-bridge comprises at least two low-resistance switches in integrated circuit (IC) form. The IC switches are each controlled by a digital control signal referenced to ground and each have an ON resistance of about 25 m? or less.Type: ApplicationFiled: June 27, 2014Publication date: December 31, 2015Inventors: Hock Gin LIM, Jimmy GO, Ricardo SAAD, David L. WILSON, Chiachen CHANG
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Publication number: 20140241727Abstract: The invention relates to a system and method of communication between optical transceivers in an optical WDM network, wherein a broad-band modulation of optical signals in a primary frequency band is utilized for transmitting primary high-speed data, while a plurality of relatively low-frequency in-band subcarriers is used to modulate the optical signals to transmit secondary data between network nodes, wherein the plurality of low-frequency subcarriers lie at least in part within the primary frequency band.Type: ApplicationFiled: February 27, 2013Publication date: August 28, 2014Inventors: Hock Gin LIM, Thomas Beck Mason, Michael Shinsky, Victor Steinberg
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Patent number: 8543010Abstract: An apparatus and method for controlling bias in an optical modulator is disclosed. The method is particularly applicable to controlling multi-wavelength modulators and wavelength-tunable transmitters. At a calibration stage, a desired optical performance of the modulator is achieved, and an amplitude of a peak-to-peak variation of the output optical signal at a pre-determined amount of dither is stored in a memory as a reference. At operating stage, a controller of the optical modulator adjusts a bias voltage of the modulator until the measured peak-to-peak optical signal variation matches the reference value stored at the calibration stage. For multi-wavelength modulators and tunable transmitters, the calibration is repeated at each wavelength, and corresponding peak-to-peak optical signal variations are stored in the memory.Type: GrantFiled: February 23, 2011Date of Patent: September 24, 2013Assignee: JDS Uniphase CorporationInventors: Yuxin Zhou, Hock Gin Lim
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Patent number: 8165466Abstract: The network operating system includes an embedded platform for controlling operation of an agile optical network at the physical layer level. At the module embedded level, each module (card-pack) is provided with an embedded controller EC that monitors and control operation of the optical modules. At the next level, each shelf is provided with a shelf processor SP that monitors and control operation of the ECs over a backplane network. All optical modules are connected over an optical trace channel to send/receive trace messages that can then be used to determine network connectivity. At the next, link management level, a network services controller NSC controls the SPs in a negotiated span of control, over a link network. The control is address-based; each NSC receives ranges of addresses for the entities in its control, and distributes these addresses to the SPs, which in turn distribute addresses to the ECs in their control.Type: GrantFiled: May 17, 2010Date of Patent: April 24, 2012Assignee: Alcatel LucentInventors: Jeffrey Kenneth Emery, Guy Claude Fortin, Markus Messerschmidt, Paul Edward Beer, Robert George Alexander Craig, Hock Gin Lim, Youxun Duan
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Publication number: 20110206384Abstract: An apparatus and method for controlling bias in an optical modulator is disclosed. The method is particularly applicable to controlling multi-wavelength modulators and wavelength-tunable transmitters. At a calibration stage, a desired optical performance of the modulator is achieved, and an amplitude of a peak-to-peak variation of the output optical signal at a pre-determined amount of dither is stored in a memory as a reference. At operating stage, a controller of the optical modulator adjusts a bias voltage of the modulator until the measured peak-to-peak optical signal variation matches the reference value stored at the calibration stage. For multi-wavelength modulators and tunable transmitters, the calibration is repeated at each wavelength, and corresponding peak-to-peak optical signal variations are stored in the memory.Type: ApplicationFiled: February 23, 2011Publication date: August 25, 2011Applicants: JDS Uniphase CorporationInventors: Yuxin ZHOU, Hock Gin Lim
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Publication number: 20100247096Abstract: The network operating system includes an embedded platform for controlling operation of an agile optical network at the physical layer level. At the module embedded level, each module (card-pack) is provided with an embedded controller EC that monitors and control operation of the optical modules. At the next level, each shelf is provided with a shelf processor SP that monitors and control operation of the ECs over a backplane network. All optical modules are connected over an optical trace channel to send/receive trace messages that can then be used to determine network connectivity. At the next, link management level, a network services controller NSC controls the SPs in a negotiated span of control, over a link network. The control is address-based; each NSC receives ranges of addresses for the entities in its control, and distributes these addresses to the SPs, which in turn distribute addresses to the ECs in their control.Type: ApplicationFiled: May 17, 2010Publication date: September 30, 2010Inventors: Jeffrey Kenneth Emery, Guy Claude Fortin, Markus Messerschmidt, Paul Edward Beer, Robert George Alexander Craig, Hock Gin Lim, Youxun Duan
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Patent number: 7747165Abstract: The network operating system includes an embedded platform for controlling operation of an agile optical network at the physical layer level. At the module embedded level, each module (card-pack) is provided with an embedded controller EC that monitors and control operation of the optical modules. At the next level, each shelf is provided with a shelf processor SP that monitors and control operation of the ECs over a backplane network. All optical modules are connected over an optical trace channel to send/receive trace messages that can then be used to determine network connectivity. At the next, link management level, a network services controller NSC controls the SPs in a negotiated span of control, over a link network. The control is address-based; each NSC receives ranges of addresses for the entities in its control, and distributes these addresses to the SPs, which in turn distribute addresses to the ECs in their control.Type: GrantFiled: June 6, 2002Date of Patent: June 29, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Jeffrey Kenneth Emery, Guy Claude Fortin, Markus Messerschmidt, Paul Edward Beer, Robert George Alexander Craig, Hock Gin Lim, Youxun Duan
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Publication number: 20080212963Abstract: A network operating system NOS for an agile optical network with a plurality of mesh interconnected switching nodes, manages the network using an object-oriented network information model. The model is common to all applications requiring the data stored in the network managed information base. The core model can be expanded for serving specific application areas. The NOS is organized in layers, at the optical module level, connection level and network level. A distributed topology server DTS organizes the physical, logical and topological data defining all network entities as managed objects MO and topology objects TO for constructing a complete network view. The network information model associates a network element NE information model, specified by managed objects MO and a topological information model, specified by topology objects TO.Type: ApplicationFiled: July 17, 2007Publication date: September 4, 2008Inventors: Guy Claude Fortin, Markus Messenschmidt, Jeffrey Kenneth Emery, Hock Gin Lim, Ralph Stemmer
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Patent number: 7263290Abstract: A network operating system NOS for an agile optical network with a plurality of mesh interconnected switching nodes, manages the network using an object-oriented network information model. The model is common to all applications requiring the data stored in the network managed information base. The core model can be expanded for serving specific application areas. The NOS is organized in layers, at the optical module level, connection level and network level. A distributed topology server DTS organizes the physical, logical and topological data defining all network entities as managed objects MO and topology objects TO for constructing a complete network view. The network information model associates a network element NE information model, specified by managed objects MO and a topological information model, specified by topology objects TO.Type: GrantFiled: September 16, 2002Date of Patent: August 28, 2007Assignee: Lucent Technologies Inc.Inventors: Guy Claude Fortin, Markus Messenschmidt, Jeffrey Kenneth Emery, Hock Gin Lim, Ralph Stemmer
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Publication number: 20040052526Abstract: An agile network is provided with a layered control system for maintaining a network-wide target performance parameter (e.g. power) along all end-to-end connections. A connection is controlled at the physical layer using optical control loops that have a concatenated response based on a set of loop time constants. The network is separated into gain based span loops and power based switch loops; each link has a gain profile, and requires a per-wavelength power target as the output power target for the switch loop at the start of the link. Use of achievable gain for the span loops allow to optimize the performance of the link. Use of individual achievable power targets allows each switch loop to autonomously ramp on and off channels without causing interference with existing and other ramping channels. A loop control uses a model-based rules block, to distribute control signals to an optical section encompassing a plurality of optical components.Type: ApplicationFiled: September 16, 2002Publication date: March 18, 2004Inventors: Kevan Peter Jones, Mark Stephen Wight, Hock Gin Lim, Paul Edward Beer, Clarence Kwok-Yan Kan, Aihua Yu, Sheldon Walklin, Jingyu Zhou, Paul Po-Wan Chan, David Andrew Whittaker, Kinh Minh Pham, Robert M. Kimball, Christian Scheerer, Alan Glen Solheim
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Publication number: 20030228146Abstract: A network operating system NOS for an agile optical network with a plurality of mesh interconnected switching nodes, manages the network using an object-oriented network information model. The model is common to all applications requiring the data stored in the network managed information base. The core model can be expanded for serving specific application areas. The NOS is organized in layers, at the optical module level, connection level and network level. A distributed topology server DTS organizes the physical, logical and topological data defining all network entities as managed objects MO and topology objects TO for constructing a complete network view. The network information model associates a network element NE information model, specified by managed objects MO and a topological information model, specified by topology objects TO.Type: ApplicationFiled: September 16, 2002Publication date: December 11, 2003Inventors: Guy Claude Fortin, Markus Messenschmidt, Jeffrey Kenneth Emery, Hock Gin Lim, Ralph Stemmer
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Publication number: 20020191241Abstract: The network operating system includes an embedded platform for controlling operation of an agile optical network at the physical layer level. At the module embedded level, each module (card-pack) is provided with an embedded controller EC that monitors and control operation of the optical modules. At the next level, each shelf is provided with a shelf processor SP that monitors and control operation of the ECs over a backplane network. All optical modules are connected over an optical trace channel to send/receive trace messages that can then be used to determine network connectivity. At the next, link management level, a network services controller NSC controls the SPs in a negotiated span of control, over a link network. The control is address-based; each NSC receives ranges of addresses for the entities in its control, and distributes these addresses to the SPs, which in turn distribute addresses to the ECs in their control.Type: ApplicationFiled: June 6, 2002Publication date: December 19, 2002Inventors: Jeffrey Kenneth Emery, Guy Claude Fortin, Markus Messerschmidt, Paul Edward Beer, Robert George Alexander Craig, Hock Gin Lim, Youxun Duan
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Publication number: 20020186432Abstract: The architecture for a photonic transport network provides for separation of passthru channels form the drop channels at the input of a switching node. A wavelength switching sub-system then switches the passthru channels, without OEO conversion. The drop channels are directed to broadband receiver of choice using a broadcast and select drop tree. The add channels are inserted at the output side of the node, using tunable transponders. In addition, a passthru channel may be OEO converted if signal conditioning and/or wavelength conversion are necessary. The transponders, regenerators and transceivers are not wavelength specific, allowing flexible and scaleable network configurations. This structure provides for fast provisioning of new services and ‘class of service’ network recovery in case of faults.Type: ApplicationFiled: June 7, 2001Publication date: December 12, 2002Inventors: Peter David Roorda, Alan Glen Solheim, Gregory Matthew Penz, Hock Gin Lim, Jeffrey Kenneth Emery, Azmina Somani, Mark Stephen Wight, Gregory Dean May, David John Nicholson, James Frodsham