Issued Patents

Enhanced disturbance monitoring and localization enabled by digital signal processing based laser phase noise estimation

Inventors: M. E. M. Pasandi (Ciena), M. O'Sullivan (Ciena), M. Reimer (Ciena), Y. Hu, D. V. Plant, R. Gutierrez-Castrejon

U.S. Patent: 20250130095 (2025)

Optical transmission systems, receivers, and devices, and methods of receiving optical signals and designing filters and filtering optical and electrical signals

Inventors: R. Maram (Fonex), K. A. Shahriar, M. S. Alam, P. Ricciardi (Fonex), and D. V. Plant

U.S. Patent: 12,375,180 (2025)

Chromatic dispersion tolerant PAM-M transceiver for optical routing to extended paths

Inventors: R. G. Castrejon (Ericsson), S. M. Ghulam, D. V. Plant, R. Brunner (Ericsson), L. Giorgi (Ericsson), and T. Catuogno (Ericsson)

U.S. Patent: 12,047,208 (2024)

Asymmetric direct detection of optical signals

Inventors: X. Li, M. O'sullivan (Ciena), Z. Xing, D. V Plant, M. E M. Pasandi (Ciena)

U.S. Patent: 11,799,560 (2024)

Optimum three dimensional constellations for optical interconnects employing stokes vector receivers

Inventors: M. Morsy-Osman, D. V. Plant, S. Lessard (Ericsson)

U.S. Patent: 11,245,473 (2022)

DSP-free `coherent lite` transceiver for next generation 1 lambda x 400G 10km optical intra-datacenter interconnects

Inventors: D. V. Plant, M. Morsy-Osman, M. Sowailem, E. El-Fiky, T. Hoang, S. Lessard (Ericsson)

U.S. Patent: 11,228,371 (2022)

Bias control structure for avalanche photodiodes

Inventors: D. V. Plant, A. Samani, and M. Ayliffe (Lumentum)

U.S. Patent: 10,797,193 (2020)

Patterned accumulation mode capacitive phase shifter

Inventors: D. V. Plant, N. A. Calvo, L. Xu, D. Patel, M. Parvizi (Ciena), and N. Ben-Hamida (Ciena)

U.S. Patent: 10,330,962 (2019)

Low-latency adjustment of flexible transceivers using pilot signal

Inventors: D. V. Plant, and Q. Zhuge (Ciena)

U.S. Patent: 10,027,424 (2018)

Optical transmitters and receivers using polarization multiplexing

Inventors: D. V. Plant, M. Osman, and M. Chagnon

U.S. Patent: 10,116,410 (2018)

Method and apparatus for distributed synchronous clocking

Inventors: David R. Rolston, David V. Plant, and Gordon W. Roberts

U.S. Patent: 7,035,269

Submitted Patents

External cavity laser with multiple materials micro-ring reflectors

Inventors: R. Maram (Fonex), M. Rezaei (Fonex), A. Bayat (Fonex), M. H. Motavas (Fonex), S. Mahmoudi (Fonex), W. Li, D. V Plant, and P. Ricciardi (Fonex)

U.S. Patent Application Filing Number:18952638 (2025)

Polarization controller and method

Inventors: W. Li, C. St. Arnault, D. V. Plant, A. Bigongiari (Ericsson), and A. D'Errico (Ericsson)

U.S. Patent Application Filing Number:63/652759 (2024)

Spatially multiplexed electrical-to-optical transduction circuit with feedback

Inventors: D. V. Plant, C. St. Arnault, B. Shastri, N. Kayed (Milkshake), H. Rorison (Milkshake), and A. Rahim ((Milkshake)

U.S. Patent Application Filing Number:39209-60483 (2024)

Time-multiplexed electrical-to-optical transduction circuit with feedback

Inventors: D.V. Plant, C. St. Arnault, B. Shastri, N. Kayed (Milkshake), H. Rorison (Milkshake), and A. Rahim (Milkshake)

U.S. Patent Application Filing Number:39209-60189 (2024)

Feedback based electrical-to-optical transduction circuit with mode-multiplexing architecture

Inventors: D.V. Plant, C. St. Arnault, B. Shastri, N. Kayed (Milkshake), H. Rorison (Milkshake), and A. Rahim (Milkshake)

U.S. Patent Application Filing Number:39209-60484 (2024)

Systems, methods, and devices for non-invasive and continuous hemodynamic measurement

Inventors: Y. D'Mello, J. Skoric, D. V. Plant, and M. Lortie

U.S. Patent Application Filing Number:63,033,103 (2021)