Biography
Biography: Pascal Besnard
Abstract
Several scientific domains including defense, metrology, aerospace, and telecommunications require low frequency and intensity noise sources. Coherent lasers could improve detection and could offer new perspectives in the fields of instrumentation for high-speed optical telecommunications, microwave-photonics systems and highly sensitive sensors. If very coherent lasers have been realized in metrology or following fundamental studies (for examples, Menlo systems), their cost or complexity is prohibitive and there is a need for compact, low-cost coherent lasers (~Hz linewidth). We propose to use multi-stokes Brilouin lasers to reach such a goal (Hey Tow et al., “Towards more coherent laser sources by using a simple and compact Brillouin laser made of micro structured chalcogenide fiber” IEEE Photonics Technology Letters 25, 3, 2013). Generation of multiple Stokes orders with a single pump enables to filter out the pump noise as many times as the number of nonlinear components, which leads to a drastic reduction in the frequency noise, accompanied by a reduction in the intensity noise. We give for the first time frequency and intensity noise measurement for high-order Stokes components for Brillouin fiber lasers. We discuss future improvements and the impact of such low-cost, compact lasers.
