Parametric Amplification and Wavelength Conversion in Dual-Core Highly Nonlinear Fibers

Abstract

In this paper we experimentally show parametric amplification and wavelength conversion in a custom manufactured dual-core highly nonlinear fiber. On-off gain > 10 dB and conversion efficiencies between −1 and −8.5 dB were measured for both cores. The estimated effective nonlinear parameter for the cores of the fiber are 6.6 W −1 km −1 and 6.3 W −1 km −1 , while the zero-dispersion wavelength for the individual cores is shown to be relatively close from each other. Furthermore, complementary analytical and numerical results show that coupled cores fiber optical parametric amplifier offer the potential of wide-band gain even when they have significantly distinct zero-dispersion wavelengths.

Core Switch Using Optically Induced Long-Period Gratings

“…By combining all the aforementioned approaches, the optical power of the pump beams can be substantially reduced to enable the use of pump beams in constant wave (CW) operation. In that way, the development of highly nonlinear fiber is of paramount importance to pave the way for all-optical core switching [14].…”

Impact of Zero-Dispersion Wavelength Fluctuations in a Coupled Dual-Core Fiber Optical Parametric Amplifier

“…This was indeed validated and tested thoroughly during this work. 6) The gain of the system is obtained by solving (4) with a RK4 method and by using Gain = |es 1 (z)−es 2 (z)| 2 |es 1 (0)−es 2 (0)| 2 [15]. Fig.…”

“…This results in the following input vector ⃗ E + (0) = (0, 0) and ⃗ E − (0) = (2e s , 0). A schematic implementation of this super-mode system is shown in [15,Fig. 8].…”

Parametric amplification in coupled nonlinear waveguides: The role of coupling dispersion

“…It has been recently proposed as a promising practical solution for optical communications featuring: flat gain profile, phase-matching in the normal dispersion regime thanks to the coupling contribution, and 0-dB noise figure in the phase-sensitive operational mode (Ribeiro et al, 2017;. Preliminary experimental results in a dual-core highly nonlinear fiber have been obtained too (Szabo et al, 2021;Ribeiro et al, 2022). Some of the authors of the present paper have furthermore shown that if the coupling is chosen with a proper spatial dependence, it can compensate for the mismatch dynamically arising due to the pump attenuation (Ribeiro and Perego, 2022a;Ribeiro and Perego, 2022b), which could solve a substantial problem in integrated amplifiers where the attenuation is of the order of 1 dB/m (Karlsson et al, 2021).…”