2015/04/16 by Neil G. R. Broderick, Broderick, Neil G. R., Stéphane Coen +2
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Fiber Optic Sensors #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices #physics.optics
paper · pdf · doi:10.48550/arxiv.1504.04129
5 pages, no figures
arxiv created 2015/04/16 · openalex publication_date 2015/04/16 · arxiv updated 2015/04/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cascaded Brillouin scattering is increasingly becoming of interest in many areas of pho- tonics (e.g. see [1] and [2]) and has been studied experimentally by many groups. In gain assisted experiments for example up to nearly 800 distinct lines have been observed[3] while in passive cavities, mode locking of a few Brillouin lines has recently been demonstrated[4]. We show that although each pair of lines interact through the creation of an acoustic phonon the resulting acoustic field nevertheless can be written as the sum of only two waves (a forward and backward propagating wave). This new analysis results in a set of strongly coupled amplitude equations for the fields that are derived here for the first time in the context of optical fibres. More-over we show that previous authors have mis- understood the nature of the acoustic field resulting in incorrect sets of coupled equations.