Raman-resonance-enhanced composite nonlinearity of air-guided modes in hollow photonic-crystal fibers |
| |
| Authors: | Fedotov Il'ya V Fedotov Andrei B Zheltikov Aleksei M |
| |
| Affiliation: | Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, Vorob'evy gory, Moscow, Russia. |
| |
| Abstract: | Coherent anti-Stokes Raman scattering (CARS) is used to measure relations between the resonant (Raman) and nonresonant (Kerr-type) optical nonlinearities of air-guided modes in a hollow-core photonic-crystal fiber (PCF). We demonstrate that, due to its interference nature, CARS provides a convenient tool for measuring the contribution of the fiber cladding to the total nonlinearity sensed by air-guided modes in hollow PCFs. On a Raman resonance with molecular vibrations in the gas that fills the fiber core, a two-color laser field is shown to induce optical nonlinearities that are several orders of magnitude higher than the nonresonant Kerr-type nonlinearities typical of air-guided PCF modes. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
