Widely tunable microwave phase shifter based on silicon-on-insulator dual-microring resonator

DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark,Build. 343, DK-2800 Kongens Lyngby, Denmark.
Optics Express (Impact Factor: 3.49). 03/2010; 18(6):6172-82. DOI: 10.1364/OE.18.006172
Source: PubMed


We propose and demonstrate tunable microwave phase shifters based on electrically tunable silicon-on-insulator microring resonators. The phase-shifting range and the RF-power variation are analyzed. A maximum phase-shifting range of 0-600 degrees is achieved by utilizing a dual-microring resonator. A quasi-linear phase shift of 360 degrees with RF-power variation lower than 2dB and a continuous 270 degrees phase shift without RF-power variation at a microwave frequency of 40GHz are also demonstrated.

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Available from: Yunhong Ding, Oct 27, 2014
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    • "But the tunable range is limited by the quality factors of the MRR and a maximum phase shift of ~4.6 rad was experimentally achieved. A modified scheme with increased phase-shift tuning range over 2π has also been proposed [24], but the device is implemented by cascaded MRRs, which impose stringent requirements on the alignment of resonance wavelengths from separate resonators. In this section, we propose and experimentally demonstrate a tunable photonic RF phase shifter based on a single MDR with a compact footprint of ~20 µm × 20 µm. "
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    • "Therefore, generation of two orthogonally polarized phase-modulated signals with complementary phase modulation is indispensable to their approach. Furthermore, silicon-on insulator (SOI) micro-ring resonators (MRRs) have been used as phase shifters [9], [10]. However, it is difficult to realize a full 360 phase shift by using a single MRR, which limits its practical applications in microwave systems. "
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