Louis G Allen

US Patent:

40392511, Aug 2, 1977

Filed:

Apr 19, 1976

Appl. No.:

5/678517

Inventors:

Louis B. Allen - Florissant MO
James R. Teague - St. Charles MO

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G02F 128

US Classification:

350157

Abstract:

A tapered crystal for use in a laser modulator in a communication system reduces switching voltage and driving power requirements. Alternately, the crystals are tapered for reduced crystal capacitance, thus decreasing the modulator rise time.

US Patent:

43800750, Apr 12, 1983

Filed:

Mar 23, 1981

Appl. No.:

6/246271

Inventors:

Louis B. Allen - Florissant MO
Herbert G. Koenig - St. Charles MO

Assignee:

McDonnell Douglas Corporation - Long Beach CA

International Classification:

H01S 319

US Classification:

372 44

Abstract:

High power operation in conjunction with excellent mode stability is rendered possible by a unique configuration comprising the use of two injection laser diode sections in a crossed-junction configuration.

US Patent:

43933939, Jul 12, 1983

Filed:

May 8, 1981

Appl. No.:

6/261832

Inventors:

Louis B. Allen - Florissant MO
Herbert G. Koenig - St. Charles MO
Robert A. Stacy - Chesterfield MO
Danny D. Meyer - St. Louis MO

Assignee:

McDonnell Douglas Corporation - Long Beach CA

International Classification:

H01L 2302
H01L 2348
H01L 2944

US Classification:

357 81

Abstract:

A laser diode is soldered between metal plates for intimate thermal and electrical contact. The plates are prefabricated and are provided with an insulative spacer therebetween. The two metal plates are held together in a preferred orientation by the spacer which is firmly adhered and sealed to the two plates during the diode soldering operation. The metal plates are constructed from material thin enough that they yield under thermal pressure of the diode to eliminate mechanical strain on the diode during thermal cycling. Backup plates are provided in contact with the diode mounting plates to feed electrical energy thereto.

US Patent:

43152252, Feb 9, 1982

Filed:

Aug 24, 1979

Appl. No.:

6/069311

Inventors:

Louis B. Allen - Florissant MO
Herbert G. Koenig - St. Charles MO
Danny D. Meyer - St. Louis MO

Assignee:

McDonnell Douglas Corporation - St. Louis MO

International Classification:

H01S 319

US Classification:

372 35

Abstract:

A laser diode is soldered between metal plates for intimate thermal and electrical contact. The plates are prefabricated and are provided with an insulated spacer therebetween. The two metal plates are held together in a preferred orientation by the spacer which is firmly adhered and sealed to the two plates during the diode soldering operation. The laser diodes so mounted can be tested in this configuration and after testing are formed into an array by stacking the laser diode subassemblies providing spacer elements therebetween and series contacts from one end to the other of the array so that an array of laser diodes with matched characteristics can be constructed in a line which may not be in alignment with the total package to provide an intense light output at a predetermined wavelength.

US Patent:

42849632, Aug 18, 1981

Filed:

Aug 24, 1979

Appl. No.:

6/069388

Inventors:

Louis B. Allen - Florissant MO
Herbert G. Koenig - St. Charles MO
Robert R. Rice - Florissant MO

Assignee:

McDonnell Douglas Corporation - St. Louis MO

International Classification:

H01S 319

US Classification:

331 945H

Abstract:

A laser diode suitable for integrated and fiber optic applications requiring single transverse and single longitudinal mode operation. The single transverse mode is provided by making a gallium arsenide double heterostructural laser diode with a narrow stripe width and a relatively long length. The single longitudinal mode operation is provided by cracking the diode transverse to the stripe at one or more locations to form internal etalons in the laser cavity.