Thomas Tamulevich

US Patent:

49899384, Feb 5, 1991

Filed:

Feb 7, 1990

Appl. No.:

7/476743

Inventors:

Thomas W. Tamulevich - Chelmsford MA

Assignee:

Light Control Systems, Inc. - Tyngsboro MA

International Classification:

G02B 626
G02B 520

US Classification:

350 9615

Abstract:

A continuously variable fiber optic attenuator which can be constructed in a size amenable to direct mounting on optical data application apparatus is presented. The attenuator utilizes a flexible filter of varying optical density which is oriented in an optical coupling region between two optical fibers. The filter can be displaced in a manner to vary the filter density in the optical coupling region and thereby vary the attenuation across the device. A resistor coupled to the attenuator provides means for calibration of the attenuator to provide a highly accurate and reproducible attenuation.

US Patent:

49040448, Feb 27, 1990

Filed:

Sep 8, 1988

Appl. No.:

7/241606

Inventors:

Thomas W. Tamulevich - Chelmsford MA

Assignee:

Light Control Systems, Inc. - Tyngsboro MA

International Classification:

G02B 632

US Classification:

350 9618

Abstract:

A continuously variable fiber optic attenuator which can be constructed in a size amenable to direct mounting on optical data application apparatus is presented. The attenuator utilizes a flexible filter of varying optical density which is oriented in an optical coupling region between two optical fibers. The filter can be displaced in a manner to vary the filter density in the optical coupling region and thereby vary the attenuation across the device. A resistor coupled to the attenuator provides means for calibration of the attenuator to provide a highly accurate and reproducible attenuation.

US Patent:

51094681, Apr 28, 1992

Filed:

May 8, 1990

Appl. No.:

7/520775

Inventors:

Thomas W. Tamulevich - Chelmsford MA
Keith R. Smith - Manchester NH
Stanley V. Paquette - Dracut MA

Assignee:

M/A-COM Light Control Systems, Inc. - Hudson NH

International Classification:

G02B 638

US Classification:

385140

Abstract:

A fiber optic attenuator having a predetermined, fixed attenuation value and low back reflection properties across a broad wavelength spectrum is disclosed. Attenuation is achieved by providing an optical fiber pathway having an attenuation region which causes a predetermined signal loss. The medium defining the pathway is of a substantially constant index of refraction through the device to minimize or eliminate interference caused by Fresnel reflections.

US Patent:

42729262, Jun 16, 1981

Filed:

Nov 5, 1979

Appl. No.:

6/091076

Inventors:

Thomas W. Tamulevich - Southbridge MA

Assignee:

Epoxy Technology Inc. - Billerica MA

International Classification:

B24B 4106

US Classification:

51216R

Abstract:

A tool for finishing a termination on a fiber optic cable has a base element cast of synthetic resin material to form a reference surface and a mounting passage, and mounts a connector element in the passage adjustably for calibrated repositioning relative to the reference surface.