Patents by Inventor Deepak Devicharan
Deepak Devicharan 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).
-
Publication number: 20230187895Abstract: A system for communicating supervisory information between amplifier nodes in an optical communication network utilizes modulation of an included pump source to superimpose the supervisory information on data signals (typically customer data signals) propagating between the amplifier nodes transmitted customer signals. The modulated pump appears as a modulated envelope on the amplified data signal exiting the amplifier node, and may be recovered by suitable demodulation components located at the second node (i.e., the destined receiver of the supervisory information). The supervisory information may include monitoring messages, provisioning data, protocol updates, etc., and is utilized as an input to an included modulator, which then forms a drive signal for the pump controller.Type: ApplicationFiled: February 2, 2023Publication date: June 15, 2023Applicant: II-VI Delaware, Inc.Inventors: Aravanan Gurusami, Deepak Devicharan, Timothy K. Zahnley, Martin R. Williams
-
Patent number: 11588295Abstract: A system and method for communicating supervisory information between amplifier nodes in an optical communication network utilizes modulation of an included pump source to superimpose the supervisory information on through-transmitted customer signals (or ASE associated with the amplifier if no customer traffic is present). The supervisory information (which may include monitoring messages, provisioning data, protocol updates, and the like) is utilized as an input to an included modulator, which then forms a drive signal for the pump controller. In a preferred embodiment, binary FSK modulation is used.Type: GrantFiled: November 1, 2019Date of Patent: February 21, 2023Assignee: II-VI Delaware, Inc.Inventors: Aravanan Gurusami, Deepak Devicharan, Timothy K. Zahnley, Martin R. Williams
-
Publication number: 20220085889Abstract: A pluggable bidirectional optical amplifier module may include preamp and booster optical amplifiers and a housing. The preamp optical amplifier may be configured to amplify optical signals traveling in a first direction. The booster optical amplifier may be configured to amplify optical signals traveling in a second direction. The housing may at least partially enclose the preamp optical amplifier and the booster optical amplifier. The pluggable bidirectional optical amplifier module may have a mechanical form factor that is compliant with a pluggable communication module form factor MSA. A colorless mux/demux cable assembly may be operated with the pluggable bidirectional optical amplifier. The colorless mux/demux cable assembly may include a 1:N optical splitter a N:1 optical combiner coupled side-by-side to the 1:N optical splitter, a first fiber optic cable optic cable, and a second fiber optic cable.Type: ApplicationFiled: September 23, 2021Publication date: March 17, 2022Inventors: Martin R. Williams, Yajun Wang, Eric Timothy Green, Aravanan Gurusami, Deepak Devicharan, Timothy Kent Zahnley, Mike Burgess
-
Patent number: 11177886Abstract: A pluggable bidirectional optical amplifier module may include preamp and booster optical amplifiers and a housing. The preamp optical amplifier may be configured to amplify optical signals traveling in a first direction. The booster optical amplifier may be configured to amplify optical signals traveling in a second direction. The housing may at least partially enclose the preamp optical amplifier and the booster optical amplifier. The pluggable bidirectional optical amplifier module may have a mechanical form factor that is compliant with a pluggable communication module form factor MSA. A colorless mux/demux cable assembly may be operated with the pluggable bidirectional optical amplifier. The colorless mux/demux cable assembly may include a 1:N optical splitter a N:1 optical combiner coupled side-by-side to the 1:N optical splitter, a first fiber optic cable optic cable, and a second fiber optic cable.Type: GrantFiled: March 6, 2020Date of Patent: November 16, 2021Assignee: II-VI DELAWARE, INC.Inventors: Martin Williams, Yajun Wang, Eric Green, Aravanan Gurusami, Deepak Devicharan, Timothy Zahnley, Mike Burgess
-
Publication number: 20210281323Abstract: A pluggable bidirectional optical amplifier module may include preamp and booster optical amplifiers and a housing. The preamp optical amplifier may be configured to amplify optical signals traveling in a first direction. The booster optical amplifier may be configured to amplify optical signals traveling in a second direction. The housing may at least partially enclose the preamp optical amplifier and the booster optical amplifier. The pluggable bidirectional optical amplifier module may have a mechanical form factor that is compliant with a pluggable communication module form factor MSA. A colorless mux/demux cable assembly may be operated with the pluggable bidirectional optical amplifier. The colorless mux/demux cable assembly may include a 1:N optical splitter a N:1 optical combiner coupled side-by-side to the 1:N optical splitter, a first fiber optic cable optic cable, and a second fiber optic cable.Type: ApplicationFiled: March 6, 2020Publication date: September 9, 2021Inventors: Martin R. Williams, Yajun Wang, Eric Timothy Green, Aravanan Gurusami, Deepak Devicharan, Timothy Kent Zahnley, Mike Burgess
-
Publication number: 20210135425Abstract: A system and method for communicating supervisory information between amplifier nodes in an optical communication network utilizes modulation of an included pump source to superimpose the supervisory information on through-transmitted customer signals (or ASE associated with the amplifier if no customer traffic is present). The supervisory information (which may include monitoring messages, provisioning data, protocol updates, and the like) is utilized as an input to an included modulator, which then forms a drive signal for the pump controller. In a preferred embodiment, binary FSK modulation is used.Type: ApplicationFiled: November 1, 2019Publication date: May 6, 2021Applicant: II-VI Delaware, Inc.Inventors: Aravanan Gurusami, Deepak Devicharan, Timothy K. Zahnley, Martin R. Williams
-
Patent number: 10564068Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.Type: GrantFiled: July 5, 2017Date of Patent: February 18, 2020Assignee: II-VI Delaware, Inc.Inventors: Aravanan Gurusami, Timothy Zahnley, Scott Dahl, Deepak Devicharan, Ian Peter McClean
-
Publication number: 20170307472Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.Type: ApplicationFiled: July 5, 2017Publication date: October 26, 2017Applicant: II-VI IncorporatedInventors: Aravanan Gurusami, Timothy Zahnley, Scott Dahl, Deepak Devicharan, Ian Peter McClean
-
Patent number: 9752955Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.Type: GrantFiled: June 30, 2015Date of Patent: September 5, 2017Assignee: II-VI INCORPORATEDInventors: Aravanan Gurusami, Timothy Zahnley, Scott Dahl, Deepak Devicharan, Ian Peter McClean
-
Publication number: 20160033359Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.Type: ApplicationFiled: June 30, 2015Publication date: February 4, 2016Applicant: II-VI INCORPORATEDInventors: Aravanan Gurusami, Timothy Zahnley, Scott Dahl, Deepak Devicharan, Ian Peter McClean
-
Patent number: 8755651Abstract: Described are tunable multiport optical filters that filter systems with many optical channels in a convenient and cost-effective manner. The tunable multiport optical filters of the invention are simple in design and have few optical components. The basic elements are a dispersion element and a rotating reflector. With properly arranged arrays of input and output optical fibers, individual wavelength components from a selected input beam are spatially separated and steered by the rotating reflector to selected output locations. The optical properties from the selected components may be measured by one or more photodetectors. The filters are also useful for selecting and routing optical signals.Type: GrantFiled: November 5, 2010Date of Patent: June 17, 2014Assignee: Oclaro (North America Inc.)Inventors: Ming Wu, Deepak Devicharan, Scott R. Dahl, Xuefeng Yue, Michael Lee Saenz
-
Publication number: 20120173175Abstract: A photodiode (PD) array accurately measures incident optical power on each of the PDs in the array by eliminating the effect of crosstalk between the individual PDs. Crosstalk within the PD array is removed by measuring the current generated by each PD in the array and generating a corrected optical power value for each PD that is based on the measured current for each PD and on coupling coefficients associated with other PDs in the array. The coupling coefficients are determined during a previous calibration procedure.Type: ApplicationFiled: December 30, 2010Publication date: July 5, 2012Inventors: Deepak DEVICHARAN, Peter G. Wigley
-
Publication number: 20120020620Abstract: Described are tunable multiport optical filters that filter systems with many optical channels in a convenient and cost-effective manner. The tunable multiport optical filters of the invention are simple in design and have few optical components. The basic elements are a dispersion element and a rotating reflector. With properly arranged arrays of input and output optical fibers, individual wavelength components from a selected input beam are spatially separated and steered by the rotating reflector to selected output locations. The optical properties from the selected components may be measured by one or more photodetectors. The filters are also useful for selecting and routing optical signals.Type: ApplicationFiled: November 5, 2010Publication date: January 26, 2012Inventors: Ming Wu, Deepak Devicharan, Scott R. Dahl, Xuefeng Yue, Michael Lee Saenz
-
Patent number: 7692793Abstract: The specification describes an optical wavelength monitor/analyzer that uses a cost effective wavelength reference source. The wavelength reference source is a nominally fixed wavelength laser with inherent tunability over a very limited wavelength range, i.e. a few nanometers. Tuning is effected by changing the temperature of the laser. The limited range is useful for making multiple wavelength measurements in the context of analyzing wavelength drift in tunable optical filters.Type: GrantFiled: November 29, 2007Date of Patent: April 6, 2010Assignee: Oclaro North America Inc.Inventors: Christopher Lin, Deepak Devicharan
-
Publication number: 20090141266Abstract: The specification describes an optical wavelength monitor/analyzer that uses a cost effective wavelength reference source. The wavelength reference source is a nominally fixed wavelength laser with inherent tunability over a very limited wavelength range, i.e. a few nanometers. Tuning is effected by changing the temperature of the laser. The limited range is useful for making multiple wavelength measurements in the context of analyzing wavelength drift in tunable optical filters.Type: ApplicationFiled: November 29, 2007Publication date: June 4, 2009Inventors: Christopher Lin, Deepak Devicharan