32 citations · 87 across the 21 of their papers we have counts for
5 papers · 1 filter
A Low-Frequency Tone Sweep Method for in-Service Fault Location in Sub-Carrier Multiplexed Optical Fiber Networks
Gustavo C. Amaral, Diego C. Villafani, Andrea Baldivieso +5
We demonstrate an optical fiber fault location method based on the frequency response of the modulated fiber optical backscattered signal in a steady state low-frequency step regim…
Fast Polarization Switch for Polarization-Based Quantum Communication
Vinicius M. Lima, Felipe Calliari, Joaquim D. Garcia +4
We present a complete optoelectronic unit for polarization visualization, switching and control. The system is based on an FPGA unit and comprises: an acquisition unit containing a…
An Optimal Polarization Tracking Algorithm for Lithium-Niobate-based Polarization Controllers
Joaquim D. Garcia, Gustavo C. Amaral
We present an optimal algorithm for the three-stage arbitrary polarization tracking using Lithium-Niobate-based Polarization Controllers: device calibration, polarization state rot…
Adaptive Trend Filter via Fast Coordinate Descent
Mario Souto, Joaquim D. Garcia, Gustavo C. Amaral
Identifying the unknown underlying trend of a given noisy signal is extremely useful for a wide range of applications. The number of potential trends might be exponential, which ca…
Adaptive Filter for Automatic Identification of Multiple Faults in a Noisy OTDR Profile
Jean Pierre von der Weid, Mario H. Souto, Joaquim D. Garcia +1
We present a novel methodology able to distinguish meaningful level shifts from typical signal fluctuations. A two-stage regularization filtering can accurately identify the locati…