Affiliation:
1. Sun Yat-sen University
2. Jinan University
3. University of California
4. Baylor University
5. Princeton University
6. Russian Quantum Center
7. M. V. Lomonosov Moscow State University
Abstract
We study coherent anti-Stokes Raman spectroscopy in air-filled anti-resonance hollow-core photonic crystal fiber, otherwise known as “revolver” fiber. We compare the vibrational coherent anti-Stokes Raman signal of N2, at ∼2331 cm−1, generated in ambient air (no fiber present), with the one generated in a 2.96 cm of a revolver fiber. We show a ∼170 times enhancement for the signal produced in the fiber, due to an increased interaction path. Remarkably, the N2 signal obtained in the revolver fiber shows near-zero non-resonant background, due to near-zero overlap between the laser field and the fiber cladding. Through our study, we find that the revolver fiber properties make it an ideal candidate for the coherent Raman spectroscopy signal enhancement.
Funder
King Abdulaziz City for Science and Technology
Welch Foundation
Subject
Atomic and Molecular Physics, and Optics