Patents by Inventor Snigdharaj Kumar Mishra
Snigdharaj Kumar Mishra 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: 20170017032Abstract: An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ?1MAX; and LP01 effective area>100 ?m2 at 1550 nm; (ii) an inner cladding surrounding the core and having a minimum relative refractive index delta ?2MIN and ?coreMAX>?2MIN; (iii) an outer cladding surrounding the inner cladding and comprising a first outer cladding portion with a maximum refractive index ?3A such that ?3A>?2MIN; and another outer cladding portion surrounding the first outer cladding portion with a maximum refractive index delta ?3B wherein with a maximum refractive index delta ?3B wherein ?3B>?3A, said another portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ?C wherein ?C>?3B.Type: ApplicationFiled: May 27, 2016Publication date: January 19, 2017Inventors: Snigdharaj Kumar Mishra, Michal Mlejnek, James Andrew West, William Allen Wood, Aramais Robert Zakharian
-
Publication number: 20170003445Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.Type: ApplicationFiled: June 21, 2016Publication date: January 5, 2017Inventors: Dana Craig Bookbinder, Ming-Jun Li, Hazel Benton Matthews, III, Snigdharaj Kumar Mishra, Pushkar Tandon
-
Patent number: 9481599Abstract: A method of making a multimode optical fiber is disclosed. In one embodiment the method includes calculating a core radius that maximizes the bandwidth of the multimode optical fiber wherein the effect of draw tension is accounted for. The embodiments herein illustrate how core radius can be tuned so the time delay of the outermost guided mode group is reduced. The resultant core radius may be targeted for a value off-nominal from what would be expected for a particular commercial optical fiber type.Type: GrantFiled: December 20, 2011Date of Patent: November 1, 2016Assignee: CORNING INCORPORATEDInventors: Scott Robertson Bickham, Oleksandr Kogan, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
-
Publication number: 20160306107Abstract: Optical fibers having a mode field diameter at 1310 nm of at least 8.8 ?m, wire mesh covered drum microbending losses at 1550 nm less than 0.03 dB/km, and a 2 m cutoff wavelength less than 1320 nm. The fibers may include a central core region, an inner cladding region, an outer cladding region, a primary coating with an in situ modulus less than 0.20 MPa and glass transition temperature less than ?35° C., and a secondary coating with an in situ modulus greater than 1500 MPa. The fibers may further include a depressed index cladding region. The relative refractive index of the central core region may be greater than the relative refractive index of the outer cladding region may be greater than the relative refractive index of the inner cladding region. The fibers may be produced at draw speeds of 30 m/s or greater.Type: ApplicationFiled: June 27, 2016Publication date: October 20, 2016Inventors: Scott Robertson Bickham, Kevin Alton Lewis, Snigdharaj Kumar Mishra, Manuela Ocampo, Joan Diana Patterson
-
Patent number: 9383511Abstract: Optical fibers having a mode field diameter at 1310 nm of at least 8.8 ?m, wire mesh covered drum microbending losses at 1550 nm less than 0.03 dB/km, and a 2 m cutoff wavelength less than 1320 nm. The fibers may include a central core region, an inner cladding region, an outer cladding region, a primary coating with an in situ modulus less than 0.20 MPa and glass transition temperature less than ?35° C., and a secondary coating with an in situ modulus greater than 1500 MPa. The fibers may further include a depressed index cladding region. The relative refractive index of the central core region may be greater than the relative refractive index of the outer cladding region may be greater than the relative refractive index of the inner cladding region. The fibers may be produced at draw speeds of 30 m/s or greater.Type: GrantFiled: March 25, 2014Date of Patent: July 5, 2016Assignee: Corning IncorporatedInventors: Scott Robertson Bickham, Kevin Alton Lewis, Snigdharaj Kumar Mishra, Manuela Ocampo, Joan Diana Patterson
-
Patent number: 9360619Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, ?1MAX, at a wavelength ?0, an inner clad region surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, ?2MIN, of about 0.0% at a wavelength of ?0, and an outer clad layer, which is doped with chlorine at greater than or equal to 0.5 weight %, surrounding the inner clad region and having a radial thickness, T3, and a maximum relative refractive index, ?3MAX, at a wavelength of ?0. The optical fiber satisfies the following relationship: ?1MAX>?3MAX>?2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at ?0.Type: GrantFiled: June 9, 2015Date of Patent: June 7, 2016Assignee: Corning IncorporatedInventors: Dana Craig Bookbinder, Oleksandr Kogan, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
-
Publication number: 20160152510Abstract: One embodiment of the disclosure relates to a method of making an optical fiber comprising the steps of: (i) exposing a silica based preform with at least one porous glass region having soot density of ? to a gas mixture comprising SiCl4 having SiCl4 mole fraction ySiCl4 at a doping temperature Tdop such that parameter X is larger than 0.03 to form the chlorine treated preform, wherein X = 1 1 + [ ( ? ? s - ? ) ? 0.209748 ? ? T dop ? Exp ? [ - 5435.33 / T dop ] y SiCl ? ? 4 3 / 4 ] and ?s is the density of the fully densified soot layer; and (ii) exposing the chlorine treated preform to temperatures above 1400° C. to completely sinter the preform to produce sintered optical fiber preform with a chlorine doped region; and (iii) drawing an optical fiber from the sintered optical preform.Type: ApplicationFiled: February 15, 2016Publication date: June 2, 2016Inventors: Brian Lee Harper, Rostislav Radiyevich Khrapko, Snigdharaj Kumar Mishra, Sonya Marie Raney, Pushkar Tandon
-
Publication number: 20160091660Abstract: A quasi-single-mode optical fiber with a large effective area is disclosed. The quasi-single-mode fiber has a core with a radius greater than 5 ?m, and a cladding section configured to support a fundamental mode and a higher-order mode. The fundamental mode has an effective area greater than 170 ?m2 and an attenuation of no greater than 0.17 dB/km at a wavelength of 1530 nm. The higher-order mode has an attenuation of at least 1.0 dB/km at the wavelength of 1530 nm. The quasi-single-mode optical fiber has a bending loss of less than 0.02 dB/turn for a bend diameter of 60 mm for a wavelength of 1625 nm.Type: ApplicationFiled: September 23, 2015Publication date: March 31, 2016Inventors: Ming-Jun Li, Snigdharaj Kumar Mishra, Michal Mlejnek, William Allen Wood, Aramais Robert Zakharian
-
Patent number: 9290405Abstract: One embodiment of the disclosure relates to a method of making an optical fiber comprising the steps of: (i) exposing a silica based preform with at least one porous glass region having soot density of ? to a gas mixture comprising SiCl4 having SiCl4 mole fraction ySiCl4 at a doping temperature Tdop such that parameter X is larger than 0.03 to form the chlorine treated preform, wherein X = 1 1 + [ ( ? ? s - ? ) ? 0.209748 ? T dop ? Exp ? [ - 5435.33 / T dop ] y SiCl ? ? 4 3 / 4 ] and ?s is the density of the fully densified soot layer; and (ii) exposing the chlorine treated preform to temperatures above 1400° C. to completely sinter the preform to produce sintered optical fiber preform with a chlorine doped region; and (iii) drawing an optical fiber from the sintered optical preform.Type: GrantFiled: August 25, 2014Date of Patent: March 22, 2016Assignee: Corning IncorporatedInventors: Brian Lee Harper, Rostislav Radiyevich Khrapko, Snigdharaj Kumar Mishra, Sonya Marie Raney, Pushkar Tandon
-
Publication number: 20150378092Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, ?1MAX, at a wavelength ?0, an inner clad region surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, ?2MIN, of about 0.0% at a wavelength of ?0, and an outer clad layer, which is doped with chlorine at greater than or equal to 0.5 weight %, surrounding the inner clad region and having a radial thickness, T3, and a maximum relative refractive index, ?3MAX, at a wavelength of ?0. The optical fiber satisfies the following relationship: ?1MAX>?3MAX>?2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at ?0.Type: ApplicationFiled: June 9, 2015Publication date: December 31, 2015Inventors: Dana Craig Bookbinder, Oleksandr Kogan, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
-
Patent number: 9188736Abstract: An optical fiber having both low bend loss. The fiber has a central core region having refractive index ?1, an inner cladding region having an outer radius r2>17 microns and refractive index ?2 and a second cladding region surrounding the inner cladding region having refractive index ?3. The fiber profile segments may be arranged so that ?1>?3>?2. The fiber may exhibit a profile volume, V2 of the inner cladding region, calculated between r1 and r2, is at least 30% ?micron2.Type: GrantFiled: March 14, 2014Date of Patent: November 17, 2015Assignee: Corning IncorporatedInventors: Snigdharaj Kumar Mishra, Pushkar Tandon
-
Publication number: 20150225280Abstract: One embodiment of the disclosure relates to a method of making an optical fiber comprising the steps of: (i) exposing a silica based preform with at least one porous glass region having soot density of ? to a gas mixture comprising SiCl4 having SiCl4 mole fraction ySiCl4 at a doping temperature Tdop such that parameter X is larger than 0.03 to form the chlorine treated preform, wherein X = 1 1 + [ ( ? ? s - ? ) ? 0.209748 ? T dop ? Exp ? [ - 5435.33 / T dop ] y SiCl ? ? 4 3 / 4 ] and ?s is the density of the fully densified soot layer; and (ii) exposing the chlorine treated preform to temperatures above 1400° C. to completely sinter the preform to produce sintered optical fiber preform with a chlorine doped region; and (iii) drawing an optical fiber from the sintered optical preform.Type: ApplicationFiled: August 25, 2014Publication date: August 13, 2015Inventors: Brian Lee Harper, Rostislav Radiyevich Khrapko, Snigdharaj Kumar Mishra, Sonya Marie Raney, Pushkar Tandon
-
Patent number: 9057814Abstract: A fiber having a large effective area at 1550 nm of at least 130 ?m2 and a wire mesh drum microbending loss of less than 0.4 dB/km at a wavelength of 1550 nm. The fibers may include a core, a cladding, and a coating. The core may include a central core region and a surrounding first core region. The cladding may include a depressed index inner cladding region and an outer cladding region. The coating may include a primary coating surrounding the cladding and a secondary coating surrounding the primary coating. The primary coating may be formed from a primary composition that may include an acrylate monomer or an N-vinyl amide monomer in combination with an acrylate oligomer, where the acrylate oligomer is present at 35 wt % to 55 wt %. The secondary coating may be formed from a secondary composition including one or more acrylate or diacrylate monomers and an acrylate or methacrylate oligomer, where the oligomer is present at 3 wt % or less.Type: GrantFiled: February 25, 2014Date of Patent: June 16, 2015Assignee: Corning IncorporatedInventors: Scott Robertson Bickham, Snigdharaj Kumar Mishra, Manuela Ocampo, Joan Diana Patterson
-
Patent number: 8971682Abstract: A few mode optical fiber comprising: a Ge-free core having an effective area Aeff of LP01 mode wherein 120 ?m2<Aeff<1000 ?m2 at 1550 nm, and a refractive index profile selected such that the core is capable of supporting the propagation and transmission of an optical signal with X number of LP modes at 1550 nm, X is an integer and 1<X?20, maximum refractive index delta of the core, ?0, wherein ?0.5%??0?0.08%; and, an annular cladding surrounding the core having a low index ring with a minimum refractive index delta ?rMIN, ?rMIN<?0 and ?rMIN??0.3 relative to pure SiO2, an outer cladding with a refractive index delta ?Outer-Clad, such that ?Outer-Clad>?rMIN; and |?0??Outer-Clad|>0.05%, the relative refractive index profile of the optical fiber is selected to provide attenuation of <0.18 dB/km at the 1550 nm, and LP11 cut off wavelength >1600 nm.Type: GrantFiled: February 25, 2013Date of Patent: March 3, 2015Assignee: Corning IncorporatedInventors: Alan Frank Evans, Andrey Evgenievich Korolev, Dmitri Vladislavovich Kuksenkov, Snigdharaj Kumar Mishra, Vladimir Nikolaevich Nazarov, William Allan Wood
-
Patent number: 8891925Abstract: An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r2>8 microns and refractive index ?2 and a second outer cladding region surrounding the inner cladding region having refractive index ?4, wherein ?1>?4>?2. The difference between ?4 and ?2 is greater than 0.002 percent. The fiber exhibits a 22 m cable cutoff less than or equal to 1260 nm, and r1/r2 is greater or equal to 0.25.Type: GrantFiled: August 17, 2012Date of Patent: November 18, 2014Assignee: Corning IncorporatedInventors: Scott Robertson Bickham, Dana Craig Bookbinder, Jeffrey Coon, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon, James Andrew West
-
Publication number: 20140328566Abstract: Optical fibers having a mode field diameter at 1310 nm of at least 8.8 ?m, wire mesh covered drum microbending losses at 1550 nm less than 0.03 dB/km, and a 2 m cutoff wavelength less than 1320 nm. The fibers may include a central core region, an inner cladding region, an outer cladding region, a primary coating with an in situ modulus less than 0.20 MPa and glass transition temperature less than ?35° C., and a secondary coating with an in situ modulus greater than 1500 MPa. The fibers may further include a depressed index cladding region. The relative refractive index of the central core region may be greater than the relative refractive index of the outer cladding region may be greater than the relative refractive index of the inner cladding region. The fibers may be produced at draw speeds of 30 m/s or greater.Type: ApplicationFiled: March 25, 2014Publication date: November 6, 2014Applicant: Corning IncorporatedInventors: Scott Robertson Bickham, Kevin Alton Lewis, Snigdharaj Kumar Mishra, Manuela Ocampo, Joan Diana Patterson
-
Patent number: 8873917Abstract: An optical fiber includes a central glass core region comprising maximum refractive index delta percent ?1, a first inner annular region surrounding said core comprising refractive index delta percent ?2, a depressed annular region surrounding said inner annular region and comprising ?3 and a third annular region surrounding the depressed annular region comprising refractive index delta percent ?4; wherein the third annular region comprises chlorine an amount greater than 0.2 weight percent in a region which is within 5 microns from the depressed annular region, wherein ?1MAX>?4>?2>?3. The difference between ?4 and ?2 is greater than 0.01 and profile volume, |V3| is at least 50% ??m2.Type: GrantFiled: May 17, 2012Date of Patent: October 28, 2014Assignee: Corning IncorporatedInventors: Paul Andrew Chludzinski, Dominick Fiordimalva, Peter Gottfried Hebgen, Snigdharaj Kumar Mishra, Sonya Marie Raney
-
Publication number: 20140301708Abstract: An optical fiber having both low bend loss. The fiber has a central core region having refractive index ?1, an inner cladding region having an outer radius r2>17 microns and refractive index ?2 and a second cladding region surrounding the inner cladding region having refractive index ?3. The fiber profile segments may be arranged so that ?1>?3>?2. The fiber may exhibit a profile volume, V2 of the inner cladding region, calculated between r1 and r2, is at least 30% ?micron2.Type: ApplicationFiled: March 14, 2014Publication date: October 9, 2014Applicant: CORNING INCORPORATEDInventors: SNIGDHARAJ KUMAR MISHRA, Pushkar Tandon
-
Publication number: 20140294355Abstract: A fiber having a large effective area at 1550 nm of at least 130 ?m2 and a wire mesh drum microbending loss of less than 0.4 dB/km at a wavelength of 1550 nm. The fibers may include a core, a cladding, and a coating. The core may include a central core region and a surrounding first core region. The cladding may include a depressed index inner cladding region and an outer cladding region. The coating may include a primary coating surrounding the cladding and a secondary coating surrounding the primary coating. The primary coating may be formed from a primary composition that may include an acrylate monomer or an N-vinyl amide monomer in combination with an acrylate oligomer, where the acrylate oligomer is present at 35 wt % to 55 wt %. The secondary coating may be formed from a secondary composition including one or more acrylate or diacrylate monomers and an acrylate or methacrylate oligomer, where the oligomer is present at 3 wt % or less.Type: ApplicationFiled: February 25, 2014Publication date: October 2, 2014Applicant: Corning IncorporatedInventors: Scott Robertson Bickham, Snigdharaj Kumar Mishra, Manuela Ocampo, Joan Diana Patterson
-
Patent number: 8538219Abstract: An optical fiber includes a central glass core region comprising maximum refractive index delta percent ?1, a first inner annular region surrounding said core comprising refractive index delta percent ?2, a depressed annular region surrounding said inner annular region and comprising ?3 and a third annular region surrounding the depressed annular region comprising refractive index delta percent ?4; wherein ?1MAX>?4>?2>?3. The difference between ?4 and ?2 is greater than 0.01% and profile volume, |V3| is at least 10%-?m2. The fibers exhibit an effective area at 1550 nm which is greater than 110 ?m2.Type: GrantFiled: October 29, 2010Date of Patent: September 17, 2013Assignee: Corning IncorporatedInventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon