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We present the design, fabrication, and results from the first monolithically integrated optical phase-locked loop (OPLL) photonic integrated circuit (PIC) suitable for a variety of homodyne and offset phase locking applications. This InP-based PIC contains two sampled-grating distributed reflector (SG-DBR) lasers, semiconductor optical amplifiers (SOAs), phase modulators, balanced photodetectors,...
We demonstrate proof-of-concept heterodyne locking of the first optical phase-locked loop photonic integrated circuit. The circuit contains two sampled-grating distributed reflector lasers monolithically integrated with optical amplifiers, multimode interference splitters/couplers, and high-speed modulators and photodetectors.
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