Carl Edward Gaebe

High performance optoelectronic packaging for 2.5 and 10 Gb/s laser modules

This paper reviews the challenges associated with developing robust and manufacturable designs for laser modules capable of intercity trunking at speeds up to 10 Gb/s. Results from electrical, thermal, and optical simulations are presented and verified experimentally. Trade-off issues resulting from conflicting performance requirements are also discussed. A sensitive technique for measuring submicron mechanical motions is described and applied to a critical subassembly. Finally, a novel optical design is proposed which compensates spherical aberrations while providing greater than 40 dB of optical isolation.

High coupling optical design for laser diodes with large aspect ratio

We have designed and performed the optical modeling of a cruciform cylindrical lens to replace the corrective lens in a confocal optical system and demonstrated a coupling efficiency of 85%. This represents more than 3 dB improvement over the conventional confocal system of single mode fiber coupling for 980 nm pump lasers. Also, the fiber alignment tolerance is about three times more relaxed than that of the wedged fiber lens.