Comparison of AWGs and Echelle Gratings for Wavelength Division Multiplexing on Silicon-on-Insulator
Authors:
- S. PathakS. Pathak
- P. DumonPDP. Dumon
- D. Van ThourhoutDTD. Van Thourhout
- W. BogaertsW. Bogaerts
Open Access
- 7 October 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Journal
- Vol. 6 (5) , 1-9
Abstract
We compare the performance (insertion loss and crosstalk) of silicon-based arrayed waveguide gratings (AWGs) and echelle gratings for different channel spacings. For high-resolution de/multiplexer (DWDM) applications, AWGs are the better choice, whereas echelle gratings perform well for low-resolution de/multiplexer (CWDM) applications. Alternatively, for low-resolution de/multiplexer applications, the conventional box-shaped silicon AWG can be modified by an S-shaped AWG. We report crosstalk as low as -27 dB for regular AWGs, whereas in the S-shaped AWGs, the crosstalk is better than -19 dB, with an insertion loss below -2 dB. The crosstalk of the echelle gratings varies between -19 and -23 dB, with insertion loss below -2 dB.Keywords
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