Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2005-04-26
2005-04-26
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S038050, C372S050121, C372S096000, C372S102000
Reexamination Certificate
active
06885686
ABSTRACT:
A semiconductor laser is formed on a semiconductor substrate with an array of laterally spaced laser device elements each including a second order distributed feedback grating bounded by distributed Bragg reflector gratings and a central phase shift in the distributed feedback grating. The device elements in which the distributed feedback grating and the distributed Bragg reflector gratings are formed have a lower effective index than the index of the interelement regions and are spaced so as to form an antiguided array. A two-dimensional semiconductor array laser may be formed of four or more of the semiconductor array devices arranged on the substrate to provide long range coherent coupling via traveling waves of light between the device elements.
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Harvey Minsun Oh
Rodriguez Armando
Wisconsin Alumni Research Foundation
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