Matthew John Dejneka

US Patent:

6374641, Apr 23, 2002

Filed:

Jun 8, 2000

Appl. No.:

09/590231

Inventors:

Polly Wanda Chu - Painted Post NY
Matthew John Dejneka - Corning NY
Brian Paul Tyndell - Addison NY
Kevin Joseph Yost - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

C03B 37025

US Classification:

65385, 65404, 65390, 65427

Abstract:

An optical article having a rare earth doped, fluorinated aluminosilicate glass core composition consisting essentially, in mole %, of: up to 15 weight % fluorine in the form of at least one of a fluorinated component of the glass composition and a batch constituent selected from a group consisting of at least one of AlF , REF , NH F , NaF, Na SiF , Na AlF , where RE(1) is at least one of Y, La, Gd, and Lu; RE(2) is at least one of Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, and Tm; R is at least one of Ba, Ca, Mg, and Sr; (SiO +GeO ) is in the range (40-90); and (Al O +Ga O ) (RO+âalkâ O+RE O ) where âalkâ is at least one of Li, Na, K, Cs, and Rb. A cullet-in-tube method for making continuous clad filament is also described. The invention provides for an optical waveguiding article having relatively high gain, a relatively flat gain spectrum, compatibility with conventional silica fiber, good durability and ease of manufacture.

US Patent:

6376399, Apr 23, 2002

Filed:

Jan 24, 2000

Appl. No.:

09/490653

Inventors:

Bruce G. Aitken - Corning NY
Matthew J. Dejneka - Corning NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

C03C 312

US Classification:

501 41, 501 37, 501 46, 501 48, 359341, 359343, 372 6, 372 40

Abstract:

Alkali tungstate, molybdate and vanadate glasses, and telecommunications components embodying such glasses, the compositions of the glasses consisting essentially of 15-70 mol percent of at least one oxide selected from the group consisting of WO , MoO and VO , 0-35% CrO , 0-15% UO , the total WO plus MoO plus VO plus CrO plus UO being 50-70%, 20-50% R O where R represents at least two elements selected from the group consisting of Li, Na, K, Rb, Cs, Ag and T1, and optionally containing 0-10% MO where M is selected from the groups of elements consisting of Ca, Ba, Sr, Mg, Cd, Pb, 0-5 % X O where x is at least one element selected from the group consisting of Al, Ga, In and Bi, 0-5% of at least one transition metal oxide, 0-15% P O and/or TeO and 0-5% of a rare earth oxide selected from the lanthanide series.

US Patent:

6515795, Feb 4, 2003

Filed:

Jun 29, 2001

Appl. No.:

09/897833

Inventors:

Matthew J. Dejneka - Corning NY
Ji Wang - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

H01S 3067

US Classification:

3593415, 359343, 501 37, 501 65, 501 77, 501 78

Abstract:

A borosilicate glass composition comprises SiO having a concentration of about 40 mole percent to about 60 mole percent, B O having a concentration of about 10 mole percent to about 30 mole percent, and an alkaline earth and/or alkali compound having a concentration of 10 mole percent to about 40 mole percent. An optical fiber amplification device comprises a borosilicate glass material cladding. The core comprises a germanate glass material doped with Tm. The germanate glass material has a first surface configured to receive an optical signal having a wavelength of from about 1400 nm to about 1540 nm and a second surface configured to output an amplified optical signal. In this manner, low cost fiber amplifiers in the 1450-1530 nm wavelength region (corresponding to the S-band) can be achieved.

US Patent:

6574406, Jun 3, 2003

Filed:

Sep 11, 2001

Appl. No.:

09/950488

Inventors:

Benjamin J. Ainslie - Ipswich, GB
Monica K. Davis - Belmont MA
Matthew J. Dejneka - Corning NY
David A. S. Loeber - Plainville MA
Raymond P. Smith - Woodbridge, GB

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 602

US Classification:

385123, 385141

Abstract:

The invention provides a selectively absorbing optical fiber that is transparent at pump wavelengths, and highly absorbing at signal wavelengths. The selectively absorbing optical fiber includes selectively absorbing species, such as rare earth ions, in concentrations sufficient to provide the desired absorbance selectivity. The fiber is useful as a fiber pigtail for pump lasers in optical amplifiers, where it can reduce the effects of multi-path interference by absorbing stray light with wavelengths in the signal band.

US Patent:

6589895, Jul 8, 2003

Filed:

Jun 29, 2001

Appl. No.:

09/897294

Inventors:

Matthew J. Dejneka - Corning NY
Jean-Philippe de Sandro - Kirkland, CA
Alexandre M. Mayolet - Auneau, FR
Bryce N. Samson - Horseheads NY
Ji Wang - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

C03C 412

US Classification:

501 42, 501 43, 501 37, 3593415, 359343

Abstract:

A Tm-doped germanate glass composition comprises GeO having a concentration of at least 20 mole percent, Tm O having a concentration of about 0. 001 mole percent to about 2 mole percent, and Ga O , having a concentration of about 2 mole percent to about 40 mole percent. The composition can further include an alkaline earth metal compound selected from the group consisting of MgO, CaO, SrO, BaO, BaF , MgF , CaF , SrF , BaCl , MgCl , CaCl , SrCl , BaBr , MgBr , CaBr , SrBr , and combinations thereof, and having a non-zero concentration of less than about 40 mole percent. The composition can further include an alkali metal compound selected from the group consisting of Li O, Na O, K O, Rb O, Cs O, Li F , Na F , K F , Rb F , Cs F , Li Cl , Na Cl , K Cl , Rb Cl , Cs Cl , Li Br , Na Br , K Br , Rb Br , Cs Br and combinations thereof, and having a non-zero concentration of less than about 20 mole percent. The emission bandwidth of the composition in the 1450 nm to 1530 nm range can be varied on the basis of one or more composition ratios. A Tm-doped germanate optical amplifier can amplify optical signals in the S-band region of the electromagnetic spectrum.

US Patent:

6694080, Feb 17, 2004

Filed:

Sep 20, 2001

Appl. No.:

09/961115

Inventors:

Matthew J. Dejneka - Corning NY
Bryce N. Samson - Horseheads NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 616

US Classification:

385123, 385142, 385144, 3593411

Abstract:

An apparatus and method for thermally tuning an optical amplifier comprises an optical waveguide doped with a fluorescent material, a thermal device for either heating or cooling the optical waveguide, and a pump light for exciting the fluorescent material. The apparatus shapes, shifts, and/or flattens the gain curves of the doped optical amplifier. Thulium doped fiber is cooled to shift the gain curve into the C-band. Erbium doped fiber is heated to flatten the gain curve in the C-band and is cooled to shift the gain curve above the L-band. The apparatus similarly shapes the gain curves of other fluorescent materials. The thermal device comprises three types of optical cooling devices. The apparatus is a component in communications systems, lasers, medical lasers and the like. The method comprises either heating or cooling optical waveguides doped with fluorescent materials to achieve the desired shaping, shifting, and flattening of the gain curves.

US Patent:

6751241, Jun 15, 2004

Filed:

Sep 27, 2001

Appl. No.:

09/968354

Inventors:

Monica K. Davis - Belmont MA
Matthew J. Dejneka - Corning NY
John D. Minelly - Painted Post NY
Luis A. Zenteno - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

H01S 300

US Classification:

372 6, 372 48, 372 75

Abstract:

An optically active waveguide laser ( ) includes a multimode portion ( ) for carrying more than one spatial mode at a predetermined wavelength chosen from a bandwidth including a pump wavelength ( ) and the lasing wavelength ( ). The multimode portion ( ) has a first refractive index. A cladding portion ( ) is proximate the multimode portion ( ). A multimode grating ( , or ) is written on at least one section ( ) of the multimode portion for reflecting the predetermined wavelength.

US Patent:

6836607, Dec 28, 2004

Filed:

Mar 14, 2001

Appl. No.:

09/808270

Inventors:

Matthew J. Dejneka - Corning NY
Adam J. Ellison - Corning NY
Dmitri V. Kuksenkov - Painted Post NY
John D. Minelly - Painted Post NY
Carlton M. Truesdale - Corning NY
Luis A. Zenteno - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 602

US Classification:

385126, 385127, 385146, 3593411, 3593413, 372 6

Abstract:

An optically active fiber ( ) is disclosed for making a fiber laser ( ) or an amplifier ( ). This double-clad structured active fiber ( ) has a core ( ), doped with an optically excitable ion having a three-level transition. The core ( ) has a core refractive index and a core cross-sectional area. An inner cladding ( ) surrounds the core ( ). The inner cladding ( ) 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 ( ) surrounds the inner cladding ( ) and has an outer cladding refractive index less than the inner cladding refractive index.