P11pd–Numerical Simulations on Quantum Noise Squeezing for CW Light in Highly Nonlinear Tellurite Fibers

Quantum noise suppression of light is desirable for a lot of applications including quantum communication, quantum sensing, and detection of gravitational waves. There are several ways to obtain squeezed light including Kerr squeezing in optical fibers. Silica fibers are commonly used for this purpose. Here we propose to use highly nonlinear tellurite glass fibers for Kerr squeezing of CW light and demonstrate by quantum dynamical simulations the possibility of -20 dB noise suppression. To simulate CW light evolution with allοwance for the quantum noise using the Wigner representatiοn, we used the Raman modified stochastic nonlinear Schrödinger equation. We take into account group velocity dispersion, deterministic nonlinear response including Kerr and Raman cοntributiοns, linear quantum noise, Raman noise, and optical losses. In simulations, Raman effects and losses are switched on and switched off to find their contributions to the limits of squeezing. For the optimal fiber lengths, losses limit the noise suppression.