Session Index

In this experiment, UV-curable resin combined with a new type of curing method is used to make the optical fiber lens with a special structure. The curing time and the amount of coating are used to adjust the radius of curvature and the size of the lens, then the coupling efficiency with the silicon photonics chip is measured in the end.

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We present a Si photonics (SiPh) mmWave-over-fiber antenna module for 5G fiber-wireless communication. The antenna module consists of silicon photonics transceivers, CMOS millimeter-wave circuits and phased array antennas, heterogeneously integrated on a PCB. We evaluated the system performance by transmitting a 28GHz, 16-QAM OFDM signal through a fiber-wireless system. Experimental results show that the EVMs are 10% and 13% for the downlink and uplink, respectively.

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Coupling control of microresonators is critical for integrated photonics when small gap in-between the bus- and resonator-waveguides are necessary to achieve efficient coupling. To alleviate the fabrication restrictions on the pitch resolution, we proposed a novel method, double-patterning, for realizing a sub-micron gap by the traditional, low-cost contact UV lithography. The fabricated resonators show high extinction ratio up to 8 dB, providing the accessibility of efficient coupling with low-cost, mass-productive fabrication.

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We demonstrate for the first time laser-powered silicon photonics circuit using a CMOS photovoltaic power converter. The optical transmission of silicon Mach-Zehnder interferometer based optical switch was finely tuned by adjusting the illuminating light intensity onto the photovoltaic cells. This proof-of-concept demonstration verifies the feasibility of the proposed scheme for all optical control silicon photonics applications.

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The cross-coupling reduction between array waveguides can lower the crosstalk and enlarge a field of view. A 16-channel optical phased array built with semi-isolated waveguides experimentally demonstrates the full horizontal and vertical widths at half maximum as 2.16 and 1.98 degrees, respectively. Moreover, the side mode suppression ratio achieves 18 dB, which is superior to previous works in a 16-channel optical phased array. In the field of view, the horizontal angle is greater than 60 degrees, and the vertical one can achieve 0.1025 degrees per nanometer.

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We demonstrate the first silicon photonics driver chip that employs thermal-optic phase shifters for interferometric fiber optics gyroscopes (IFOG). This chip occupies only an area of 1.1 mm2, and successfully drives an IFOG system with a scale factor accuracy of 1.42% under ±1000 deg/hr rotational rate.

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In this work, we propose the design of bus waveguide to enhance the coupling strength between the bus- and resonator-waveguides. By introducing the taper structures at the coupled regime, we successfully demonstrate high coupling efficiency with an enhancement factor up to 7.1. Without the need for a small gap between bus waveguide and micro-cavity, this taper design with cost-effective, mass-productive i-line lithography offers potentials in nonlinear and quantum photonics, relying on strong/over-coupling.

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