Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 19, Issue 13-16, Pages 1130-1132Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2007.900313
Keywords
beam forming; complementary metal-oxide-semiconductor (CMOS)-compatible waveguide technology; optical beam forming network (OBFN); optical ring resonator (ORR); phased array antenna
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Optical ring resonators (ORRs) are good candidates to provide continuously tunable delay in optical beam forming networks (OBFNs) for phased array antenna systems. Delay and splitting/combining elements can be integrated on a single optical chip to form an OBFN. A state-of-the-art ring resonator- based 1 x 8 OBFN chip has been fabricated in complementary metaloxide-semiconductor-compatible waveguide technology. A binary tree topology is used for the network such that a different number of ORRs is cascaded for delay generation at each output. In this letter, the principle of operation is explained and demonstrated by presenting some measurement results on the 1 x 8 OBFN chip.
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