Patents by Inventor Luis A. Zenteno
Luis A. Zenteno 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: 6944192Abstract: An optical device (10) includes a broad area laser (72) for lasing at a first wavelength (64), a multimode active-doped tapered waveguide laser (6); and a multimode passive planar mode transformer (118) coupling and tapering from the broad area laser (72) to the multimode active-doped tapered waveguide laser (6).Type: GrantFiled: June 6, 2003Date of Patent: September 13, 2005Assignee: Corning IncorporatedInventors: Michel Prassas, Luis A. Zenteno
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Publication number: 20050158006Abstract: An optical fiber comprising: (i) a silica based, rare earth doped core having a first index of refraction n1; (ii) a silica based inner cladding surrounding the core having a second index of refraction n2, such that n1>n2; (iii) a silica based outer cladding surrounding the inner cladding having a third index of refraction n3 such that n2>n3, wherein inner cladding diameter is at least 125 ?m.Type: ApplicationFiled: January 19, 2005Publication date: July 21, 2005Inventors: Joohyun Koh, Christine Tennent, Donnell Walton, Ji Wang, Luis Zenteno
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Publication number: 20050100073Abstract: An optically active fiber (30) is disclosed for making a fiber laser (18) or an amplifier (16) for optically pumping by a broad area laser diode for operation in the 1.5 micron band. This double-clad structured active fiber (30) has a core (34), doped with an optically excitable erbium ion having a quasi-three-level transition. The core (3) has a core refractive index and a core cross-sectional area. An inner cladding (32) surrounds the core (34). The inner cladding (32) has an inner cladding refractive index less than the core refractive index, an inner cladding cross-sectional area between 2 and 25 times greater than that of the core cross-sectional area, and an aspect ratio greater than 1.5:1. An outer cladding (36) surrounds the inner cladding (32) and has an outer cladding refractive index less than the inner cladding refractive index.Type: ApplicationFiled: November 10, 2003Publication date: May 12, 2005Inventors: Lawrence Hughes, Xingsheng Liu, Donnell Walton, Chung-En Zah, Luis Zenteno
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Publication number: 20050069257Abstract: A fiber lens includes a multimode fiber and a refractive lens disposed at an end of the multimode fiber. The refractive lens focuses a beam from the multimode fiber into a diffraction-limited spot. In one embodiment, a graded-index is interposed between the multimode fiber and the refractive lens. In one embodiment, the combination of the graded-index and the refractive lens enables extreme anamorphic lens characteristics.Type: ApplicationFiled: September 23, 2004Publication date: March 31, 2005Inventors: Venkata Bhagavatula, John Himmelreich, Phyllis Markowski, Michael Rasmusen, Nagaraja Shashidhar, Luis Zenteno
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Patent number: 6836607Abstract: An optically active fiber (30) is disclosed for making a fiber laser (18) or an amplifier (16). This double-clad structured active fiber (30) has a core (34), doped with an optically excitable ion having a three-level transition. The core (34) has a core refractive index and a core cross-sectional area. An inner cladding (32) surrounds the core (34). The inner cladding (32) has an inner cladding refractive index less than the core refractive index, an inner cladding cross-sectional area between 2 and 25 times greater than that of the core cross-sectional area, and an aspect ratio greater than 1.5:1. An outer cladding (36) surrounds the inner cladding (32) and has an outer cladding refractive index less than the inner cladding refractive index.Type: GrantFiled: March 14, 2001Date of Patent: December 28, 2004Assignee: Corning IncorporatedInventors: Matthew J. Dejneka, Adam J. Ellison, Dmitri V. Kuksenkov, John D. Minelly, Carlton M. Truesdale, Luis A. Zenteno
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Publication number: 20040258377Abstract: An optically active linear single polarization device includes a linearly birefringent and linearly dichroic optical waveguide (30) for propagating light and having single polarization wavelength range (48). A plurality of active dopants are disposed in a portion (34) of the linearly birefringent and linearly dichroic optical waveguide (30) for providing operation of the waveguide in an operating wavelength range (650) for overlapping the single polarization wavelength range (48).Type: ApplicationFiled: October 30, 2003Publication date: December 23, 2004Inventors: George E. Berkey, Ming-Jun Li, Daniel A. Nolan, Donnell T. Walton, Luis A. Zenteno
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Publication number: 20040233941Abstract: An optically-active air-clad fiber (30) includes a core (34, 84) that facilitates doping with an ion optically excitable and having a three-level optical transition when pumped at a first end (28) of an optical cavity (46) by a multimode pump source (72) at a pump wavelength (64) for lasing at a signal wavelength (66) different than the pump wavelength (64) at a second end (29) of the optical cavity (46), the core (34, 84) having a refractive index, wherein the core (34, 84) is transformed from the first end to proximate the second end (29) thereof such that the optically-active fiber (30) is multimode at the pump wavelength proximate to the first end (28), and is single-mode at the signal wavelength proximate to the second end (29). An air-clad (36, 86) surrounds at least one portion of the core (34, 84) and has a lower effective refractive index than the refractive index of the core (34, 84).Type: ApplicationFiled: December 19, 2003Publication date: November 25, 2004Inventors: James C. Fajardo, Michael T. Gallagher, Anping Liu, (Ying)Lisa Peng, Carlton M. Truesdale, Luis A. Zenteno
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Patent number: 6751241Abstract: An optically active waveguide laser (30) includes a multimode portion (126) for carrying more than one spatial mode at a predetermined wavelength chosen from a bandwidth including a pump wavelength (64) and the lasing wavelength (66). The multimode portion (126) has a first refractive index. A cladding portion (386) is proximate the multimode portion (126). A multimode grating (60, 56, or 62) is written on at least one section (26) of the multimode portion for reflecting the predetermined wavelength.Type: GrantFiled: September 27, 2001Date of Patent: June 15, 2004Assignee: Corning IncorporatedInventors: Monica K. Davis, Matthew J. Dejneka, John D. Minelly, Luis A. Zenteno
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Publication number: 20030210725Abstract: An optical device (10) includes a broad area laser (72) for lasing at a first wavelength (64), a multimode active-doped tapered waveguide laser (6); and a multimode passive planar mode transformer (118) coupling and tapering from the broad area laser (72) to the multimode active-doped tapered waveguide laser (6).Type: ApplicationFiled: June 6, 2003Publication date: November 13, 2003Applicant: CORNING INCORPORATED, a New York corporationInventors: Michel Prassas, Luis A. Zenteno
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Patent number: 6625182Abstract: A semiconductor laser having an external cavity including a single-mode optical fiber. A Bragg grating is written onto the fiber which defines the end of the optical cavity, selects the lasing wavelength, and discriminates against the lasing of higher-order transverse modes in the multi-mode gain region. In one embodiment, the semiconductor laser includes an optically active vertical-cavity semiconductor stack similar to a vertical-cavity surface emitting laser. The stack is optically pumped either from the front or the back over a relatively large area such a multi-mode beam is output. Optics couple the multi-mode beam to the single-mode input of the fiber. A partially transmissive mirror of reflectivity between 25 and 40% may be placed on the output surface of the semiconductor stack to form a coupled-cavity laser. A plurality of laser diodes can be angularly positioned around the area of the semiconductor stack being pumped to increase the total pump power.Type: GrantFiled: April 20, 2000Date of Patent: September 23, 2003Assignee: Corning IncorporatedInventors: Dmitri V. Kuksenkov, John D. Minelly, Luis A. Zenteno
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Publication number: 20030063629Abstract: An optically active waveguide laser (30) includes a multimode portion (126) for carrying more than one spatial mode at a predetermined wavelength chosen from a bandwidth including a pump wavelength (64) and the lasing wavelength (66). The multimode portion (126) has a first refractive index. A cladding portion (386) is proximate the multimode portion (126). A multimode grating (60, 56, or 62) is written on at least one section (26) of the multimode portion for reflecting the predetermined wavelength.Type: ApplicationFiled: September 27, 2001Publication date: April 3, 2003Inventors: Monica K. Davis, Matthew J. Dejneka, John D. Minelly, Luis A. Zenteno
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Patent number: 6522450Abstract: An apparatus and method of chromatic dispersion includes the negative compensation per channel filter (130) coupled to an optical receiving path (100) for providing a lossless discontinuous per-channel dispersion compensation in the optical receiving path (100). The optical receiving path (100) includes an input port (131), at the input of the filter (130), for receiving an input optical pulse (120) having a packet of waves at corresponding frequencies transmitted and received by an optical fiber (115).Type: GrantFiled: April 25, 2001Date of Patent: February 18, 2003Assignee: Corning IncorporatedInventor: Luis A. Zenteno
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Publication number: 20020159691Abstract: An apparatus and method of chromatic dispersion includes the negative compensation per channel filter (130) coupled to an optical receiving path (100) for providing a lossless discontinuous per-channel dispersion compensation in the optical receiving path (100). The optical receiving path (100) includes an input port (131), at the input of the filter (130), for receiving an input optical pulse (120) having a packet of waves at corresponding frequencies transmitted and received by an optical fiber (115).Type: ApplicationFiled: April 25, 2001Publication date: October 31, 2002Inventor: Luis A. Zenteno
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Publication number: 20020159736Abstract: An optically active fiber (30) is disclosed for making a fiber laser (18) or an amplifier (16). This double-clad structured active fiber (30) has a core (34), doped with an optically excitable ion having a three-level transition. The core (34) has a core refractive index and a core cross-sectional area. An inner cladding (32) surrounds the core (34). The inner cladding (32) has an inner cladding refractive index less than the core refractive index, an inner cladding cross-sectional area between 2 and 25 times greater than that of the core cross-sectional area, and an aspect ratio greater than 1.5:1. An outer cladding (36) surrounds the inner cladding (32) and has an outer cladding refractive index less than the inner cladding refractive index.Type: ApplicationFiled: March 14, 2001Publication date: October 31, 2002Inventors: Matthew J. Dejneka, Adam J. Ellison, Dmitri V. Kuksenkov, John D. Minelly, Carlton M. Truesdale, Luis A. Zenteno
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Patent number: 6441953Abstract: A multi-stage optical fiber amplifier comprises a first gain stage amplifying and optical signal; a pumping source coupled to the first gain stage, a second gain stage coupled to the first gain to further amplifying the optical signal to a desired output signal power, and a second pumping source coupled to the second gain stage. The second pumping source is preferably an erbium-doped fiber laser and has an operating wavelength between about 1520 nm and about 1620 nm. This amplifier achieves good noise figure and high output powers.Type: GrantFiled: April 24, 2000Date of Patent: August 27, 2002Assignee: Corning IncorporatedInventors: Gregory J. Cowle, Felton A. Flood, Chia Chi Wang, Luis A. Zenteno
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Patent number: 6427491Abstract: An optical fiber with a non-circular cross-section is realized by creating a void having the desired cross-section in a housing and filling the void with an optical material. This structure is then collapsed to solidify it and drawn to desired dimensions. The optical material may be rods, soot or ground material.Type: GrantFiled: August 20, 1999Date of Patent: August 6, 2002Assignee: Corning IncorporatedInventors: Gerald E. Burke, Carlton M. Truesdale, Luis A. Zenteno
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Patent number: 6370180Abstract: The invention includes a solid state laser which outputs wavelength emission &lgr;ss centered about 946 nm, combined with a lasing waveguide which includes a Yb doped optical waveguide such that when the &lgr;ss output is inputted into the lasing waveguide the lasing waveguide produces a wavelength emission &lgr;y centered about 980 nm. The invention further includes the utilization of pump light with optical waveguide amplifying devices.Type: GrantFiled: October 25, 1999Date of Patent: April 9, 2002Assignee: Corning IncorporatedInventor: Luis A. Zenteno
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Publication number: 20020012378Abstract: The invention includes a solid state laser which outputs wavelength emission &lgr;ss, centered about 946 nm, combined with a lasing waveguide which includes a Yb doped optical waveguide such that when the &lgr;ss output is inputted into the lasing waveguide the lasing waveguide produces a wavelength emission &lgr;y centered about 980 nm. The invention further includes the utilization of pump light with optical waveguide amplifying devices.Type: ApplicationFiled: October 25, 1999Publication date: January 31, 2002Inventor: LUIS A. ZENTENO
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Patent number: 6324326Abstract: A tapered fiber laser having a multi-mode section, a single-mode section, and either a tapered section or fundamental mode matching junction therebetween. The multi-mode section has a large core to directly receive pump light from a broad stripe laser or diode bar, and a length preferably longer than the absorption length of the pump light (so optical amplification occurs predominantly in the multi-mode section). Doping levels can be increased to reduce the multi-mode length. The taper angle is sufficiently small to produce adiabatic compression of the fundamental mode from the multi-mode to single-mode sections, and acts as a cutoff filter favoring lasing of the fundamental mode within the multi-mode section. Alternately, the step junction may have a mode field diameter matched to the lowest-order mode, with laser light output via the single-mode section.Type: GrantFiled: August 20, 1999Date of Patent: November 27, 2001Assignee: Corning IncorporatedInventors: Matthew J. Dejneka, John D. Minelly, Luis A. Zenteno