Compact low loss single air interface bends in polymer waveguides.
We report the design, fabrication, and measurement of high efficiency, compact 45 degrees single air interface bends in low refractive index contrast waveguides in a low refractive index material system. Using standard microfabrication techniques, the bends are fabricated on silicon substrates using perfluorcyclobutyl (PFCB) copolymers, which feature a high glass transition temperature and low absorption loss. The measured 45 degrees bends have a loss of 0.30+/-0.03dB/bend for TM polarization and 0.33+/-0.03dB/bend for TE polarization.
Cardenas
Jaime
J
Li
Lixia
L
Kim
Seunghyun
S
Nordin
Gregory
G