Tunable Fiber Optic Laser

This is the spectrum of the tunable fiber optic laser built with two-cascaded Optune tunable optical filters (see Publications [1]). It has FWHM line width down to 41MHz, tuning range of 200+nm, tuning speed below 1ms across 200nm and linear tuning characteristic, among other interesting features. This laser configuration is a very good candidate for building an universal interrogator for all type of fiber optic sensors currently in use.