Ultracompact Polymer Waveguide Devices for WDM Application (Paperback) (ISBN-13: 9783639007404)

A fabrication process for PFCB waveguide air-trench bends on silicon substrate with electron beam lithography (EBL) and autoalignment has been developed and a high efficiency air-trench bend (97.2% for TE polarization and 96.2% for TM polarization) has been demonstrated. The simulation predicts an optical efficiency of 98.5% for TE and 98.2% for TM when the Goos Hanchen shift is properly accounted for. We have adapted this process to making air trench bends in PFCB waveguides on polyimide substrates. Compared to silicon substrates, the polyimide substrates have the advantage of less coefficient of thermal expansion (CTE) mismatch with PFCB films, which improves fabrication repeatability and yield. Using air-trench bends, an ultracompact 8 x 8 arrayed waveguide grating (AWG) demultiplexer (200 GHz) for WDM has been designed and fabricated on a polyimide substrate. Compared to a conventional AWG in the same material system, the air-trench bend AWG shrinks the required chip area by a factor of 20. The decreased size is a factor in reducing the measured thermal shift to -0.012 nm/C and decreasing the polarization-dependent wavelength shift to 1.3 nm.

Author: Yongbin Lin
ISBN-10: 3639007409
ISBN-13: 9783639007404
Publisher: VDM Verlag Dr. Mueller E.K.
Language: English
Published: 05/15/2008
Pages: 108
Format: Paperback
Weight: 0.34lbs
Size: 9.00h x 6.00w x 0.22d