Joseph Salzman

US Patent:

46740961, Jun 16, 1987

Filed:

Mar 4, 1985

Appl. No.:

6/707672

Inventors:

Joseph Salzman - Pasadena CA
Robert J. Lang - Pasadena CA
Amnon Yariv - San Marino CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

H01S 308
H01S 310

US Classification:

372 50

Abstract:

Two or more parallel waveguide lasers of different effective length are coupled together by their evanescent waves such that the composite structure functions as a single cavity having a longitudinal mode with resonances related to the resonances of the separate cavities. A very strong selection of the composite operating frequency, and suppression of most or all of the other longitudinal modes, with frequency tuning of the composite structure (both continuously and by mode hopping), can be accomplished by varying the relative currents supplied to each laser. Upon holding one cavity at one current level for a selected operating point and shifting the other, bistable operation can be achieved.

US Patent:

48273252, May 2, 1989

Filed:

May 4, 1987

Appl. No.:

7/046523

Inventors:

Zvi Or-Bach - Haifa, IL
Joseph Salzman - South Pasadena CA

International Classification:

H01L 2702
H01L 2934

US Classification:

357 54

Abstract:

A multilayer optical coating for semiconductor substrates characterized in that it is etchable by conventional techniques used for fabrication of integrated circuits and has high reflectivity.