Binoptics Corporation

Norman Kwong

Alex A Behfar

Malcolm R Green

Joseph John Vandenberg

Cristian Stagaresen

A semiconductor chip has at least two DFB etched facet laser cavities with one set of facets with AR coatings and a second set of etched facets with HR coatings that have a different relative position with respect to the gratings. This creates a difference in the phase between each of the etched facets and the gratings which changes the operational characteristics of the two laser cavities such that at least one of the lasers provides acceptable performance. As a result, the two cavity arrangement greatly improves the yield of the fabricated chips.

Multiple cavity etched-facet DFB lasers

A surface emitting laser () and a monitoring photodetector (MPD)are mounted in a TO (transistor outline package) can () on the same plane as one another. Light from a rear facet () of the laser is directed to the MPD through a polymer light guide ().

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San Marino, CA, United States of America

Norman Kwong