Scaffardi, M. et al. (2017) A silicon microring optical 2 × 2 switch exploiting orbital angular momentum for interconnection networks up to 20

No abstract

Novel architectures for two-layer interconnection networks based on concentric OAM emitters are presented. A scalability analysis is done in terms of devices characteristics, power budget and optical signal to noise ratio by exploiting experimentally measured parameters. The analysis shows that by exploiting optical amplifications, the proposed interconnection networks can support a number of ports higher than 100. The OAM crosstalk induced-penalty, evaluated through an experimental characterization, do not significantly affect the interconnection network performance.

An ultra‐high frequency (UHF) travelling wave antenna based on complementary split ring resonator (CSRR) element is investigated in this study for pure near‐field radio frequency identification (RFID) system. The proposed antenna consists of a T‐type power divider, 180° phase shifter, two microstrip transmission lines ended with two 50thinmathspacenormalΩ resistors and the metal ground loaded CSRR elements. The CSRR elements are loaded on the metal floor corresponding to the minimum current points and middle of the two transmission lines. The CSRR elements resonate at the centre frequency and introduce coupling to enhance the magnetic field. The measured −10 dB impedance bandwidth of the proposed antenna is 46 MHz (889–935 MHz), which covers the standards of Chinese and American bands. The reading regions for near‐field tag, far‐field tag and anti‐metal tag are 400×200×10thinmathspacenormalmm3, 400×200×70thinmathspacenormalmm3 and 400×200×60thinmathspacenormalmm3, respectively. The far‐field gain is less than −22 dBi, which makes the antenna suitable for the pure near‐field application.

A silicon-on-insulator microring with three superimposed gratings is proposed and characterized as a device enabling 3×3 optical switching based on orbital angular momentum and wavelength as switching domains. Measurements show penalties with respect to the back-to-back of <1  dB at a bit error rate of 10 for OOK traffic up to 20 Gbaud. Different switch configuration cases are implemented, with measured power penalty variations of less than 0.5 dB at bit error rates of 10. An analysis is also carried out to highlight the dependence of the number of switch ports on the design parameters of the multigrating microring.