| Grant number: | 22/14485-5 |
| Support Opportunities: | Regular Research Grants |
| Start date: | July 01, 2023 |
| End date: | June 30, 2025 |
| Field of knowledge: | Engineering - Electrical Engineering - Telecommunications |
| Principal Investigator: | Eric Alberto de Mello Fagotto |
| Grantee: | Eric Alberto de Mello Fagotto |
| Host Institution: | Escola Politécnica (EP). Pontifícia Universidade Católica de Campinas (PUC-CAMP). Campinas , SP, Brazil |
| Associated researchers: | Hugo Enrique Hernández Figueroa ; Sandro Marcelo Rossi |
Abstract
Optical parametric amplifiers (OPAs) are based on four-wave mixing, a nonlinear ultra-fast process that relies on the third-order of the susceptibility and, therefore, on the third-order of the electric polarization. On the other side, optical amplifiers currently deployed in telecommunications systems are based on mechanisms of stimulated emission that lead to much longer response times than the OPAs. Stimulated emission also imposes intrinsic limits to these amplifiers bandwidths, whereas an OPA band is defined by its nonlinear medium dispersion, which can be engineered. Thus, OPAs are very attractive devices for optical signal processing in telecommunication systems because they are transparent to modulation formats and data rates, and their bandwidths can be tailored. Furthermore, since their principle of operation does not rely on electronic transitions, they do not add amplified spontaneous emission (ASE) noise to the signals. This deleterious effect is accumulative because the optical signals are amplified at every network node. In addition to being used as optical amplifiers, they are promising as wavelength converters, devices that can mitigate spectral fragmentation and eliminate wavelength continuity constraint in optical networks. Presently, the only commercial option for wavelength conversion are the optic-electric-optic converters, which are expensive electronic devices specific to modulation formats and data rates. In this proposal, it is outlined a numerical investigation for the design of integrated optical parametric amplifiers (iOPAs) as wideband amplifiers and wavelength converters and their systemic join test with DP-QPSK and DP-16QAM WDM signals in C- and L-bands. The platform Si3N4/SiO2/Si is used for the design of the iOPAs because of its compatibility with processes and materials of the microelectronic industry for complementary metal-oxide (CMOS) devices. The guiding layer is made of Si3N4, which can be a low loss and broadly transparent material in the telecommunication bandwidth, and it can provide high confinement because of its index contrast to SiO2. In the systemic test, wideband amplifiers and wavelength converters, the former designed as dual-pump iOPAs and the latter as single-pump iOPAs, will be placed in nodes connected to optical links that span over typical distances found in long-haul and ultra-long-haul optical communication systems. Afterwards, the performance of such devices will be evaluated by estimating the bit error rate (BER) and it will be compared to the performance of the corresponding technologies currently used. The present proposal is novel, mainly, regarding the joint evaluation of amplifiers and wavelength converters as integrated devices, with WDM DP signals, in an optical communication system under real-world scenarios. Finally, it is expected results from this investigation can provide significant information for the fabrication of iOPAs for optical networks. (AU)
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