Gaafar, Mahmoud A.Mahmoud A.GaafarBouchalkha, AbdellatifAbdellatifBouchalkhaKasmi, ChaoukiChaoukiKasmiVega, FelixFelixVega2026-02-032026-02-032026-01-15IEEE Photonics Journal (in Press): (2026)https://hdl.handle.net/11420/61251We propose a scheme for an on-chip signal pulse compression using a temporal telescope formed by a pump-induced moving refractive index front. To the best of our knowledge, this is the first numerical demonstration of such a concept using moving index perturbations. We numerically study the signal dynamics under the influence of a moving refractive index front in optical waveguides, revealing analogies to relativistic event horizon physics. Our simulations show that a free-carrier-induced refractive index front, which lowers the refractive index and induces a blue shift in the waveguide's band diagram, can overtake and trap a signal pulse, dynamically accelerating it to the front's velocity. As the interaction continues, the signal is eventually released from the front and transitions into a new velocity regime. This process of trapping, acceleration, and release mirrors the behavior of light near gravitational horizons, with the release phase analogous to light escaping a white hole. These results pave the way for new approaches in nonlinear optics and signal processing using compact, chip-scale systems.en1943-06552026IEEEhttps://creativecommons.org/licenses/by/4.0/Non-linear signal manipulationon-chip dynamic pulse compressionoptical analogue of event horizonTechnology::621: Applied Physics::621.3: Electrical Engineering, Electronic EngineeringNatural Sciences and Mathematics::530: PhysicsNatural Sciences and Mathematics::518: Numerical AnalysisJournal Articlehttps://doi.org/10.15480/882.1661710.1109/JPHOT.2026.365455910.15480/882.16617Journal Article