Effective Michelson interference observed in fiber-optical analogue of Hawking radiation
Abstract
We experimentally observe the stimulated analogue of Hawking radiation produced in a photonic-crystal fiber, with a pulsed pump and a continuous-wave probe. In particular, we propose and demonstrate an innovative method to boost the efficiency and probe the coherence characteristics of the analogue Hawking effect relying on a double pump pulse with a controlled temporal delay. We show that the emitted analogue Hawking radiation corresponds to the coherently-added, interfering Hawking signals resulting from the probe interacting with each pump pulse. We introduce a simple effective Michelson interference model, and demonstrate excellent agreement between our experimental data and the predictions derived from this model. Importantly, while naively increasing the pump power in an attempt to boost the Hawking-radiation generation efficiency results in the distortion of the output signal, we show that at the maxima of the observed Hawking-signal interference pattern, the signal can be increased by a factor of >3 (up to 4 under ideal experimental conditions). This approach could be extended to the use of sequences of m pulses, resulting in a Hawking-signal enhancement of m2.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 24, 2022
- Source ID
- 10.1364/oe.447201
Entities
People
- Alfred B. U’Ren
- David Bermúdez
- Hector Cruz-ramirez
- Karina Garay-Palmett
- Rodrigo Felipe-elizarraras
Organizations
- Air Force Office of Scientific Research
- Center for Research and Advanced Studies of the National Polytechnic Institute
- Consejo Nacional de Humanidades, Ciencias y Tecnologías
- Ensenada Center for Scientific Research and Higher Education
- National Autonomous University of Mexico