In this paper, we demonstrate an 8-bit silicon optical true-time delay line with a high resolution of 1.78 ps based on the cascaded optical switches. The total delay time is larger than 400 ps. The crosstalk of the optical switch is below -25 dB and -21 dB in the C band under cross-state and bar-state, respectively. The calculated delay loss is about 2.4 dB/ns.
In this paper, we demonstrate a reconfigurable device that could realize modulation on TE0 polarization or TM0 polarization selectively. The device consists of a pair of TM0-TE1/TE1-TM0 mode converters, two TE0-TE1 mode exchangers, and a TE1 mode micro-ring modulator. 32 Gb/s on-off keying modulation is successfully demonstrated both for TE0 polarization and TM0 polarization.
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