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We demonstrate a new post-fabrication trimming technique to fine-tune the phase of integrated Mach-Zehnder Interferometers (MZIs), enabling permanent correction of typical fabrication based phase errors. Preliminary results demonstrate a phase trimming accuracy of 0.146π.
The design and characterization of a silicon-on-insulator planar concave grating based (de)multiplexer operating at 3.8µm is reported. Low insertion loss (≈1.6dB) and good crosstalk characteristics (≈19dB) are demonstrated.
We experimentally compare the extinction ratio enhancement of RZ-OOK signal using four-wave mixing in a silicon waveguide at 10 Gb/s and 40 Gb/s. The measured extinction ratio enhancement was 4.7 and 4.1 dB, respectively.
We propose and show that a linearly chirped waveguide grating can reduce reflection and increase the coupling efficiency from ~25% to ~42% for coupling light from a submicron-sized silicon waveguide to a vertical optical fiber.
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