Single frequency fiber laser based on an ultrathin metal–organic framework

Abstract

Metal–organic frameworks (MOFs), an emerging and new class of 2D material family, have offered a nanotechnology platform for achieving unprecedented success in divisional fields. There has been great progress in exploring the many applications of MOF, yet a single frequency (SF) fiber laser that is based on the nonlinearities in a two-dimensional (2D) MOF has barely been studied. In this study paper, to the best of our knowledge, this is the first demonstration of a SF fiber laser that was fabricated with the use of a MOF as a saturable absorber. The line width of the SF fiber laser is 3.2 kHz, which is dramatically narrower than that in previous studies of 2D materials. Its output power fluctuation is less than 1.3%, which is also more stable than the previous record based on 2D materials. Considering the diversity of MOF, this study provides a valuable strategy and intuition for the development of MOF-based nonlinear optical materials and opens a new avenue for advanced photonic devices made with SF fiber lasers.