Location History:
- Torino, IT (1989 - 2001)
- Turin, IT (1987 - 2003)
Company Filing History:
5 out of 280 
3 out of 4,671 
1 out of 37 Years Active: 1987-2003
Title: The Innovations of Francesco Cisternino
Introduction
Francesco Cisternino is a notable inventor based in Turin, Italy. He has made significant contributions to the field of optical technologies, holding a total of 9 patents. His work focuses on advanced methods and devices that enhance optical communication systems.
Latest Patents
One of Cisternino's latest patents is a "Method of and a device for polarization-independent optical demultiplexing." This invention involves a method and device for optical demultiplexing that utilizes four wave mixing between the signals to be demultiplexed and pump signals. The signals are introduced into a polarization maintaining fiber, which separates them into two components with orthogonal polarization, allowing for separate four wave mixing and resulting in two polarization-rotated signals that are re-combined.
Another significant patent is the "Opto-electronic frequency divider circuit and method of operating same." This circuit features an electro-optical mixer, such as an electro-optical Mach-Zehnder modulator, which receives an optical signal at the frequency to be divided, along with an electric signal at a corresponding frequency. The output optical signal exhibits a modulation spectrum that includes the frequency difference between the divided frequency and at least one harmonic of the electric signal. This output is then filtered to extract the frequency difference component, which is used as both the mixing signal and the output signal from the divider.
Career Highlights
Francesco Cisternino has worked with prominent companies in the telecommunications sector, including CSELT (Centro Studi e Laboratori Telecomunicazioni S.p.A.) and Agilent Technologies, Inc. His experience in these organizations has contributed to his expertise in optical technologies and innovations.
Collaborations
Throughout his career, Cisternino has collaborated with notable professionals in the field, including Riccardo Calvani and Renato Caponi. These collaborations have further enriched his work and contributed to the development of his patented technologies.
Conclusion
Francesco Cisternino's contributions to optical technology through his patents and collaborations highlight his role as an influential inventor in the field. His innovative methods and devices continue to impact the advancement of optical communication systems.