Coherent light generators – Particular active media – Semiconductor
Patent
1992-05-14
1994-06-07
Bovernick, Rodney B.
Coherent light generators
Particular active media
Semiconductor
372 50, H01S 319
Patent
active
053196597
ABSTRACT:
A high-power broad-area semiconductor laser having a intracavity spatial phase controller is disclosed. The integrated intracavity spatial phase controller is easily formed by patterning an electrical contact metallization layer when fabricating the semiconductor laser. This spatial phase controller changes the normally broad far-field emission beam of such a laser into a single-lobed near-diffraction-limited beam at pulsed output powers of over 400 mW. Two operating modes, a thermal and a gain operating mode, exist for the phase controller, allowing for steering and switching the beam as the modes of operation are switched, and the emission beam may be scanned, for example, over a range of 1.4 degrees or switched by 8 degrees. More than one spatial phase controller may be integrated into the laser structure.
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Bovernick Rodney B.
Chafin James H.
Moser William R.
Ojanen Karuna
The United States of America as represented by the United States
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