Abstract
A hollow multimode interference (MMI) coupler based on semiconductor hollow waveguides formed from omnidirectional reflectors (SHOW-ODR) is demonstrated. The device has a shorter coupling length than a conventional silicon-on-insulator MMI coupler. A uniformity was achieved at operating wavelengths between 1520 and . The device exhibited a weak polarization dependence in the TE and TM modes.
© 2007 Optical Society of America
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