Kevin L Robinson

US Patent:

20030091257, May 15, 2003

Filed:

Nov 10, 2001

Appl. No.:

10/007290

Inventors:

Utpal Chakrabarti - Allentown PA, US
Julia Duncan - Mertztown PA, US
Kevin Robinson - Zionsville PA, US
Michael Serbin - Trexlertown PA, US
Yiu-Man Wong - Wescosville PA, US

International Classification:

G02F001/035
G02B006/10

US Classification:

385/002000, 385/131000

Abstract:

The invention is an optical waveguide device and method of fabrication, where the device includes a pyroelectric substrate such as lithium niobate, a waveguide formed in the substrate, a buffer layer formed over the substrate, and at least one electrode formed over the buffer layer. The device further includes a dielectric diffusion barrier layer formed between the substrate and the buffer layer. The dielectric material is preferably a fluorine-doped nitride or a deuterated nitride.

US Patent:

61379417, Oct 24, 2000

Filed:

Sep 3, 1998

Appl. No.:

9/146446

Inventors:

Kevin Cyrus Robinson - Zionsville PA

Assignee:

Lucent Technologies, Inc. - Murray Hill NJ

International Classification:

G02B 626

US Classification:

385140

Abstract:

A variable optical attenuator includes a lens, first and second optical waveguides, and a semiconductor micro-electro-mechanical device positioned on a side of the lens opposite the first and second optical waveguides. The semiconductor micro-electro-mechanical device may be, for example, a digital micromirror device or a silicon micro-electro-mechanical system. The device has a reflecting surface. The reflecting surface has a normal position in which light from the first waveguide reflects off of the reflecting surface and passes through the lens into the second waveguide. The reflecting surface has a plurality of respectively different attenuating positions in which light from the first waveguide reflects off of the reflecting surface and passes through the lens, but an amount of light entering the second optical waveguide is attenuated by respectively different amounts corresponding to the respectively different positions. By pivoting the reflecting surface about 0. 35 degrees or less from the normal position, 40 dB of attenuation are obtained relative to the normal position.

US Patent:

63010305, Oct 9, 2001

Filed:

Aug 14, 1998

Appl. No.:

9/134734

Inventors:

Kevin Cyrus Robinson - Zionsville PA

Assignee:

Lucent Technologies, Inc. - Holmdel NJ

International Classification:

H04J 1406

US Classification:

359122

Abstract:

A birefringent wedge is used to multiplex beams of the same or similar wavelength. The multiplexing system has a compact construction and does not require beam splitters or right angle prisms. The birefringent wedge may also be used to polarization demultiplex an incoming multiplexed communication beam. The invention may be used to increase the data-carrying capacity of optical fiber.

US Patent:

59332697, Aug 3, 1999

Filed:

Aug 22, 1997

Appl. No.:

8/920279

Inventors:

Kevin C. Robinson - Zionsville PA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02F 109

US Classification:

359280

Abstract:

A magneto-optical switch having three or more ports and two or more lenses, in which at least two ports share a common lens. In one embodiment, the switch has three ports and two lenses, where two of the ports share one of the lenses. In another embodiment, the switch has four ports and two lenses, where two of the ports share one lens and the other two ports share the other lens. A magnet generates a magnetic field in either of two directions to select one of two operating modes for the switch. Walk-off plates separate light energy into two polarized beams and rotators rotate the polarization states of those beams as a function of the magnetic field. Depending on the direction of the rotation, another walk-off plate is used either to recombine the two polarized beams or to further separate them. Further separated beams are reflected from a mirror, while converged beams are transmitted through the light-transmitting center of the mirror. Reflected light exits one port, while transmitted light exits a different port.

US Patent:

60881518, Jul 11, 2000

Filed:

Nov 16, 1998

Appl. No.:

9/192652

Inventors:

Kevin C. Robinson - Zionsville PA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02F 100
G02B 632

US Classification:

359322

Abstract:

An optical modulator controllably attenuates an optical signal by changing the index of refraction of an electro-optic prism in the modulator by varying the electrical bias applied to the electro-optic prism. Changing the index of refraction alters the path along which the optical signal travels through the optical modulator. By appropriately focusing the optical signal, the location of the optical signal relative to an output fiber can be controlled to vary the degree of optical coupling between the optical signal and the output fiber, thereby changing the amplitude of the outgoing optical signal. In one embodiment, the optical modulator has an electro-optic prism located between a lens and a mirror, where the mirror reflects the optical signal to pass through the prism and the lens two times: once along an input path and once along an output path. In another embodiment, the optical modulator has an electro-optic prism located between two lenses and the optical signal passes through the prism and each lens a single time, where one lens focuses the optical signal before passing through the prism and the other lens focuses the optical signal after passing through the prism.

US Patent:

20200375375, Dec 3, 2020

Filed:

Jun 3, 2019

Appl. No.:

16/429758

Inventors:

- Memphis TN, US
Kevin Edward Robinson - Wallingford PA, US

International Classification:

A47F 5/11
A47F 5/00
A47B 43/02

Abstract:

A hutch unit including a front panel, a back panel, and two laterally opposing sidewalls hingedly connected to the front panel. One or more shelf units are provided, each shelf unit including a front shelf edge hingedly connected to the front panel and a rear shelf edge hingedly connected to the back panel. The back panel includes opposing lateral back edges, and first and second back flaps are hingedly connected to the lateral back edges extending forward from the back panel. Each of the first and second back flaps is positioned in abutting relationship to a respective sidewall to define first and second overlapping sidewall portions along each sidewall. Vertical sliding connections join the back flaps to the sidewalls at the overlapping sidewall portions, wherein the vertical sliding connections guide the back panel in vertical displacement relative to the sidewalls.