he worked on MEMS based infrared cameras with optical readout and laser based microprojectors. Since 2009 he has been working on multimode and multicore components, wavelength selective switches and optical amplifiers, and numerous first experimental demonstration of long-distance high-capacity space-division multiplexed transmission over multimode fibers and coupled-core multicore fibers. He is a fellow of the IEEE, fellow of the Optical Society of America, a Bell Labs fellow, and recipient of the 2018 IPS William Streifer Scientific Achievement Award. He authored/coauthored over 250 journal and conference publications, and holds over 50 patents.