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Optical frequency combs are used as a set of mutually coherently orthogonal signals to realize high speed signal processing. Here, we demonstrate novel comb sources, along with modulation and detection techniques that realize high speed sampling, arbitrary waveform generation and matched filtering functionality.
The technique of multiheterodyne detection is applied to a dynamically varying pulse train, the amplitude and frequency of which are changing at hundreds of kilohertz rates. Unlike traditional pulse reconstruction techniques, time-resolved multiheterodyne provides a method to measure the optical intensity and phase of a pulse train in time bins of approximately 100 ns duration. 10 GHz return-to-zeros...
We demonstrate a mode division multiplexing (MDM) system over an 8 km conventional graded index multimode fiber (GI-MMF). Spatial light modulators (SLMs) are used to multiplex and demultiplex three linearly polarized (LP) modes (LP01, LP11a and LP11b) in two polarizations. A 6×6 sparse frequency domain equalizer (FDE) is used as the channel impulse response of the SLM-based MDM system is found to...
We fabricated an optical interferometric gyroscope front-end with a tunable laser on the heterogeneous silicon platform. We successfully demonstrated a laser based gyroscope with low noise floor comparable to a commercial ASE based gyroscope.
We demonstrate that a metasurface can be designed that allows generating and controlling Surface Plasmons according to the illuminating light polarization state and wavelength. Plasmon focusing as well and generation and control of wakes will be discussed together with a Near-field technique for imaging.
We propose a novel configuration to implement bandwidth-tunable add-drop filters using integrated contra directional grating assisted couplers with a bandwidth tunable from 8 nm to 16 nm. Measurement results of passive structures are presented and the tuning method is analyzed.
A dielectric multilayer platform sustaining Bloch surface waves is investigated for planar integrated optics. We study the optical properties of high refractive index material (TiO2) and obtain propagation lengths in the range of millimeters.
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