We propose and demonstrate a photonic scheme to generate reconfigurable radar waveforms based on an integrated silicon in-phase and quadrature-phase (IQ) modulator. It has significant advantages over commercial LiNbO3...
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We propose and demonstrate a photonic scheme to generate reconfigurable radar waveforms based on an integrated silicon in-phase and quadrature-phase (IQ) modulator. It has significant advantages over commercial LiNbO3 modulator-based schemes in terms of the compatibility with CMOS technology, compact size, light weight, low cost and low power consumption. Experimentally, multi-format radar waveforms, including dual-chirp microwave waveforms, phase-shift keying signals, and amplitude-shift keying signals are successfully generated. The generated waveforms have flexible tunability of center frequency and bandwidth. Our scheme shows the great potential of an on-chip scheme to generate multi-format microwave waveforms for modern radars and electronic warfare systems.
Transfer printing integration of planar membrane devices on photonic and electronic circuits is becoming a well established technology. Typical systems incorporate a single planar layer printed into full contact with ...
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Transfer printing integration of planar membrane devices on photonic and electronic circuits is becoming a well established technology. Typical systems incorporate a single planar layer printed into full contact with the host substrate. In this work we present an advanced transfer print system that enables printing of optical devices in non-planar geometries and allows in-situ optical monitoring of devices. We show micro-resonators with air-clad whispering gallery modes coupled to on-chip waveguides, inverted device printing and three dimensionally assembled micro-cavities incorporating semiconductor micro-lenses and nanowire lasers. We demonstrate printing onto non-standard substrates including optical chip facets and single-mode fibre ends. The optical fibre printing was carried out with alignment assistance from in-situ optical coupling through the transfer printing system in real-time allowing active alignment of the system.
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