Abstract

Diffractive optical elements (DOE’s) were designed and fabricated to provide a means both for monitoring vertical-cavity-surface-emitting-laser(VCSEL) output power and for coupling the VCSEL output onto a fiber. The design put two DOE’s on opposite sides of a glass cover positioned over the VCSEL header/can. The power monitor DOE, located on the inner surface of the cover glass, operates in reflection and focuses ~2% of the emitted radiation into an annular ring centered on the VCSEL. Approximately 88% of the transmitted light is in the zero order and is available for focusing on to a fiber by a second DOE located on the back (outer) surface of the cans cover glass.

© 1998 Optical Society of America