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Bragg gratings are one of most powerful basic components for optical signal processing. They have been intensively used to construct various functional devices, such as lasers, modulators, WDM filters, optical delay lines, dispersion compensators, sensors etc. The Bragg grating can be regarded as one-dimensional photonic crystal whose performance can be easily tailored by changing the grating parameters...
We present a CMOS-compatible temperature-independent tunable silicon lattice filter composed of 10 cascaded 2×2 asymmetric Mach-Zehnder interferometers. Experiments show the device has a wide wavelength tuning range and low temperature sensitivity of ~6.2 pm/°C.
We experimentally demonstrate two-stage self-coupled optical waveguide (SCOW) resonators. Coupled-resonator-induced-transparency (CRIT) and high-order filtering features are observed. Resonance spectrum is tunable via a p-i-p thermal resistor or a p-i-n diode.
We experimentally demonstrate tunable silicon comb filters based on Fabry-Perot resonators composed of Sagnac loop mirrors using periodically-interleaved PN junctions. Forward and reverse biases blue- and red-shift the comb lines, respectively.
We present a reflective-type delay line using side-coupled integrated spaced sequence of resonators (SCISSOR) terminated with a Sagnac loop reflector. With 13 microrings, group delay of ∼150 ps is achieved with 170 GHz bandwidth.
We experimentally demonstrate a self-coupled optical waveguide (SCOW)-based optical resonator. Transmission spectra reveal the resonators can exhibit split, broadened, or enhanced resonance dips. The SCOW resonators can be used for second-order optical filters.
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