Abstract

We demonstrate compact silicon-on-insulator-based arrayed waveguide gratings (AWGs) for (de)multiplexing applications with a large free spectral range (FSR). The large FSR is obtained by reducing the arm aperture pitch without changing the device footprint. We demonstrate 4×100GHz, 8×250GHz, and 12×400GHz AWGs with FSRs of 6.9, 24.8, and 69.8, respectively. We measured an insertion loss from 2.45dB for high to 0.53dB for low-resolution AWGs. The crosstalk varies between 17.12 and 21.37 dB. The bandwidth remains nearly constant, and the nonuniformity between the center wavelength channel and the outer wavelength channel improves with larger FSR values.

© 2013 Optical Society of America

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