The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1991
Filed:
Aug. 17, 1990
Donald R Scifres, San Jose, CA (US);
Richard R Craig, Palo Alto, CA (US);
Robert G Waarts, Palo Alto, CA (US);
Spectra Diode Laboratories, Inc., San Jose, CA (US);
Abstract
A laser having a phase conjugating reflector positioned with a resonant cavity of a laser configuration capable of multimode operation. The resonant cavity or other means associated with the laser configuration selects the preferred mode at threshold. The phase conjugating material builds up reflectivity as the light intensity is increased above threshold power levels to maintain the selected mode to high power levels. One embodiment has an external Talbot cavity with a first mirror in a Talbot plane of a multi-emitter laser array and with the phase conjugating material at a sub-Talbot plane. Another embodiment has an external GRIN lens cavity with a far field apertured stripe mirror for threshold mode selection. The phase conjugator is placed at a high light intensity position within the cavity such as adjacent to the stripe mirror or adjacent to the laser array. The laser source may be a linear laser diode array or a 2-D surface emitting laser array. An additionl embodiment uses a diode-array-pumped solid state laser medium together with a phase conjugator between the cavity mirrors.