Ronald Lee Soderstrom

US Patent:

49174533, Apr 17, 1990

Filed:

Sep 29, 1988

Appl. No.:

7/251975

Inventors:

Timothy R. Block - Rochester MN
Gerald M. Heiling - Pine Island MN
Dennis L. Karst - Rochester MN
David C. Kobliska - Rochester MN
Tong Lu - Rochester MN
Ronald L. Soderstrom - Rochester MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G02B 632

US Classification:

350 9620

Abstract:

An optical communication signal source package and assembly for coupling optical signals to the end of an optical fiber includes first and second semiconductor laser diodes capable of being operated in a redundant fashion for increased reliability or to provide wavelength division multiplexing for increases in bandwidth and information carrying capability. The laser diodes are supported with their mounting flanges in a common plane and are oriented to provide parallel beams of polarized light having perpendicular E-field vectors. A connector carried by the support positions the optical fiber at the target area where an optics system focuses the light beams. An optical coupling device such as a polarizing beam splitter or a holographic beam separator is responsive to the orthogonal light beams to direct both light beams toward the optical fiber with minimum decrease in amplitude. The package includes no moving parts or highly frequency selective components. The package is employed in a compact communication signal coupling assembly permitting short electrical lead lengths and high circuit density.

US Patent:

43050808, Dec 8, 1981

Filed:

Jul 18, 1979

Appl. No.:

6/058593

Inventors:

Earl A. Cunningham - Rochester MN
David E. Cutshall - Rochester MN
Gerald M. Heiling - Pine Island MN
Ronald L. Soderstrom - Rochester MN
James M. Thompson - Rochester MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01D 1510
H05B 100

US Classification:

346 76PH

Abstract:

A driver circuit for a thermal printing element varies the power applied to the element, depending upon its recent history of energization, in order to maintain uniform print density desprite temperature variation in the element. A capacitor charges and discharges to measure time intervals since the last element energization to control the voltage applied by an output transistor.

US Patent:

44234252, Dec 27, 1983

Filed:

Feb 1, 1982

Appl. No.:

6/344439

Inventors:

Dennis L. Reese - Rochester MN
John L. Regehr - Stewartville MN
Albert E. Schierhorst - Boca Raton FL
Ronald L. Soderstrom - Rochester MN
James M. Thompson - Poughkeepsie NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01D 1510

US Classification:

346 76PH

Abstract:

A porcelain glazed metal bar has a rounded edge carrying a line of deposited print elements. Conductive lands deposited on both sides of the glazed bar connect the print elements to contacts for external circuitry.

US Patent:

48500445, Jul 18, 1989

Filed:

Jun 23, 1988

Appl. No.:

7/210364

Inventors:

Timothy R. Block - Rochester MN
Ronald L. Soderstrom - Rochester MN
Gerald M. Heiling - Pine Island MN
Charles J. Rocca - Rochester MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04B 900

US Classification:

455607

Abstract:

An optical serial data bus for connecting logic cards used in a data processing system. The bus uses semiconductor lasers and PIN diodes as transmitters and receivers, transmitting through free space without the use of lenses or other optical elements. Each logic card communicates only with the adjacent cards on either side to minimize the transmission distance.

US Patent:

53294289, Jul 12, 1994

Filed:

Jun 21, 1993

Appl. No.:

8/080275

Inventors:

Timothy R. Block - Rochester MN
David P. Gaio - Rochester MN
Ronald L. Soderstrom - Rochester MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H01R 2368

US Classification:

361785

Abstract:

Packaging for an electronics assembly. A base card has a row of elongated slots. A number of individually insertable subassemblies have standoff feet and a pair of offset hooks at their sides. The hooks snap into the slots in such a way that each slot can hold the hooks for four different subassemblies, which are positioned adjacent each other and on both sides of the base card.

US Patent:

50695223, Dec 3, 1991

Filed:

Mar 19, 1991

Appl. No.:

7/672193

Inventors:

Timothy R. Block - Rochester MN
Marcia B. Ebler - Rochester MN
Ladd W. Freitag - Rochester MN
Gerald M. Heiling - Rochester MN
Spencer C. Holter - Rochester MN
Dennis L. Karst - Rochester MN
David W. Siljenberg - Rochester MN
Ronald L. Soderstrom - Rochester MN
John T. Trnka - Rochester MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G02B 636

US Classification:

385 39

Abstract:

An optical fiber link card communication module, and process for fabricating the module, where the module provides a parallel electrical interface to the user, facilitates high speed serial transmission of data over an optical data link, and contains a plurality of converters for performing conversions between both electrical and optical signals. A preferred embodiment of the invention contemplates fabricating the optical communication module on a single multilayer card with all the transmitter electrical components being located on one side of the card, all receiver electrical components being located on the other side of the card, and the transmitter and receiver components being separated by shielding layers in the card. By using two transmitter/receiver pairs (with the transmitters and receivers being located on respective sides of the card) an embodiment of the invention provides for double full duplex communications.

US Patent:

45952612, Jun 17, 1986

Filed:

Oct 13, 1983

Appl. No.:

6/541604

Inventors:

Holger J. Baasch - Rochester MN
Douglas S. Goodman - Yorktown Heights NY
Francis S. Luecke - Byron MN
Ronald L. Soderstrom - Rochester MN
Eberhard A. Spiller - Mt. Kisco NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G02B 530
G02B 108

US Classification:

350394

Abstract:

A phase retardation element, for use in an optical data storage system, which provides a 90. degree. phase difference between two perpendicular polarized components of an incident wave with a single internal reflection from a surface coated with a thin film of dielectric or metal material.

US Patent:

50391941, Aug 13, 1991

Filed:

Jan 9, 1990

Appl. No.:

7/462681

Inventors:

Timothy R. Block - Rochester MN
Marcia B. Ebler - Rochester MN
Ladd W. Freitag - Rochester MN
Gerald M. Heiling - Pine Island MN
Spencer C. Holter - Rochester MN
Dennis L. Karst - Rochester MN
David W. Siljenberg - Byron MN
Ronald L. Soderstrom - Rochester MN
John T. Trnka - Rochester MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G02B 626
G02B 636

US Classification:

383 88

Abstract:

An optical fiber link card communication module, and process for fabricating the module, where the module provides a parallel electrical interface to the user, facilitates high speed serial transmission of data over an optical data link, and contains a plurality of converters for performing conversions between both electrical and optical signals. The module further includes edge mounted optical components having leads mounted on the surface of a card (as opposed to standard pin-in-hole type leads) to minimize lead capacitance and inductance from the optical components to the card electronics, on board card control means for the converters and safety shut down means on the same card as the electrical and optical components.