2017/11/16 by Elias Giacoumidis, Giacoumidis, Elias, Amol Choudhary +19
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Fiber Optic Sensors #Advanced Photonic Communication Systems #Applied Physics (physics.app-ph) #FOS: Physical sciences #Optical Network Technologies #Optics (physics.optics) #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.1712.03142
openalex publication_date 2017/11/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Modern fiber-optic coherent communications employ advanced\nspectrally-efficient modulation formats that require sophisticated narrow\nlinewidth local oscillators (LOs) and complex digital signal processing (DSP).\nHere, we establish a novel approach to carrier recovery harnessing large-gain\nstimulated Brillouin scattering (SBS) on a photonic chip for up to 116.82\nGbit/sec self-coherent optical signals, eliminating the need for a separate LO.\nIn contrast to SBS processing on-fiber, our solution provides phase and\npolarization stability while the narrow SBS linewidth allows for a\nrecord-breaking small guardband of ~265 MHz, resulting in higher\nspectral-efficiency than benchmark self-coherent schemes. This approach reveals\ncomparable performance to state-of-the-art coherent optical receivers without\nrequiring advanced DSP. Our demonstration develops a low-noise and\nfrequency-preserving filter that synchronously regenerates a low-power\nnarrowband optical tone that could relax the requirements on very-high-order\nmodulation signaling and be useful in long-baseline interferometry for\nprecision optical timing or reconstructing a reference tone for quantum-state\nmeasurements.\n