Far-detuned parametric sidebands via multiple intermodal
four-wave mixing in communication fiber

Sudip K Chatterjee¹ and R Vijaya^2
1Department of Physics, Bennett University, Greater Noida-201 310, India
²Department of Physics and Centre for Lasers and Photonics, Indian Institute of Technology Kanpur, Kanpur-208 016, India

Dedicated to Professor Bishnu P Pal for his enormous contributions to the advancement of research and education in science and technology through his unique vision and outstanding dedication

We present a detailed investigation of multiple intermodal four-wave mixing (IMFWM) in the standard communications-grade fiber when it is pumped in the deep normal dispersion regime with Q-switched nanosecond pulses at 532 nm. A brief theoretical analysis based on coupled nonlinear Schrödinger equation under quasi-cw approximation, considering different modes for pumping, is carried out to identify all the allowed phase-matched Stokes and anti-Stokes waves having degenerate and non-degenerate mode configurations. With the first-order anti-Stokes thus generated as the secondary pump, the cascaded IMFWM can produce discrete emission in the ultraviolet range near 390 nm. © Anita Publications. All rights reserved.
Keywords: Four-wave mixing, Parametric Process, Nonlinear Schrödinger equation, Phase-matching.

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