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The optical-phase-locked-loop linear phase demodulator is the most critical component for a high dynamic range phase modulated RF/Photonic link. Due to the stringent loop latency requirement, the OPLL should be implemented as a photonic integrated circuit. In this paper we address the design and implementation of an all optical attenuation-counter-propagating (ACP) optical-phase-locked-loop photonic...
Phase modulator nonlinearity is a major problem for implementing an optical phase-locked loop (OPLL) phase demodulator. In this letter, we report an improved InP phase modulator design that uses a detuned shallow multiquantum-well structure. The phase modulator shows high linearity and low optical loss. Its phase IP3 and optical loss per unit length are ~ 4 π/mm and ~ 0.9 dB/mm, respectively. This...
The frequency down-converter is an essential element of a photonic radar frontend. In this paper we describe a new photonic frequency down-conversion approach employing a quadratic optical phase modulator. When paired with an OPLL linear phase demodulator, this approach can potentially achieve a large dynamic range and a low conversion loss. A preliminary experiment has been performed to verify frequency...
Tremendous advances are being made in silicon photonics. Complicated photonic integrated circuits combining active and passive devices are becoming available for a large variety of applications from telecommunications to imaging.
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