Terry Vanderwert

US Patent:

20040047537, Mar 11, 2004

Filed:

Sep 6, 2002

Appl. No.:

10/236877

Inventors:

Warren Boord - Brooklyn Park MN, US
Terry Vanderwert - Inver Grove Heights MN, US
Anil Jain - North Oaks MN, US

International Classification:

G02B006/12
G02B006/26

US Classification:

385/014000, 385/015000

Abstract:

A substantially planar fan-out circuit that receives a set of signals at one end and conducts the signals via a set of waveguides to an opposite end of the circuit. The intensity of at least one of the optical signals is detected with an optical detector integrated into the optical circuit. The detected optical signal is attenuated with a variable optical attenuator integrated into the optical circuit. The variable optical attenuator effects an attenuation level based upon an output of the optical detector. The optical signals are delivered from the second end of the optical circuit, so that the optical signals are either more or less dispersed at the second end of the optical circuit than at the first end.

US Patent:

20040047571, Mar 11, 2004

Filed:

Sep 6, 2002

Appl. No.:

10/237250

Inventors:

Warren Boord - Brooklyn Park MN, US
Terry Vanderwert - Inver Grove Heights MN, US

International Classification:

G02B006/00

US Classification:

385/094000, 385/138000

Abstract:

A hermetically sealed ferrule includes one or more walls cooperating to enclose a volume. At least one of the walls defines an orifice permitting passage to the enclosed volume. A fiber optic ribbon passes through the orifice to the enclosed volume. The fiber optic ribbon includes a plurality of optical fibers with a protective coating surrounding each of the optical fibers. Each optical fiber is exposed where it passes through the orifice. A low-temperature melting point glass seals a space between the exposed optical fibers and the region of the wall defining the orifice. A first epoxy layer extends between the fiber optic ribbon, an outer surface of the region of the wall defining the orifice, and the low-temperature melting point glass. A second epoxy layer extends between the fiber optic ribbon, an inner surface of the region of the wall defining the orifice, and the low-temperature melting point glass.

US Patent:

55213740, May 28, 1996

Filed:

Sep 7, 1994

Appl. No.:

8/302070

Inventors:

Gregory D. Cray - Chanhassen MN
Terry L. VanderWert - Inver Grove Heights MN

Assignee:

Lumonics Corporation - Eden Prairie MN

International Classification:

H01J 314

US Classification:

250216

Abstract:

A laser beam measurement device comprises a pinhole aperture spaced to one side of a power meter for measuring the power level of the laser beam. The positioning system of the laser system causes the laser beam to move relative to the pinhole aperture in each of the three x, y and z directions of an xyz coordinate system, namely longitudinally, transversely and radially relative to the pinhole aperture, respectively. During each scan, the power meter measures the Gaussian distribution of the power level that occurs when the laser beam passes through the pinhole aperture and moves relative thereto along the scan axis. The coordinate position of the laser beam along each scan axis is identified corresponding to a peak value of the Gaussian distribution, thus deriving a three dimensional reference location corresponding to the point in space at which the focal point of the laser beam is centered on the pinhole aperture.