American Telephone & Telegraph Co., At&t Bell Laboratories

Daniel R Kaplan

Stephen R Forrest

Andrew H Bobeck

Paul A Kohl

Yusuke Ota

Robert Louis Hartman

Michael G Brown

Lloyd R Harriott

Harvey S Trop

George J Przybylek

William J Tabor

A reflection filter is disposed on a solid state laser so as to preferentially reflect TE or TM modes and to suppress oscillation within the resonator of the non-reflected modes. In one embodiment, the filter includes a layer having a plurality of grooves which may be straight and parallel or curved to approximate the mode shape. In another embodiment, the filter includes a polarization sensitive film, without grooves, which either absorbs or transmits the undesired mode. Specifically described is a buried heterostructure semiconductor DFB laser with such a reflection filter formed on at least one facet thereof.

Tranverse mode control in solid state lasers

Linear arrays of optical fibers are aligned to linear arrays of optoelectronic devices (e.g., photodiodes, diode lasers or LEDs) formed on an elongated chip. The alignment procedure results in a subassembly which includes fiber segments embedded between V-groove mounting blocks and the device array chip affixed to an end face of the blocks.

Aligning arrays of optoelectronic devices to arrays of optical fibers

Growing community of inventors

Springfield, NJ, United States of America

Daniel R Kaplan