Abstract
We present the ultra-compact hybrid integration of a 1060-nm-band multi-wavelength vertical cavity surface emitting laser (VCSEL) array with a tapered hollow waveguide multiplexer. The design of the hollow waveguide multiplexer is presented based on ray optics. We show the potential of a 12-channel array VCSEL output multiplexed in a multi-mode fiber. The device length is as small as 200 µm. The proposed hollow waveguide multiplexer would be useful for realizing compact wavelength division multiplexing (WDM) transceivers for optical interconnects.