Design of simple and compact tunable fibre laser

Introduction: Interaction between light and material is closely related to light wavelength; therefore tunable lasers are widely used in many applications, for example, medicine, biology and optical measurement systems. Generally, lasers emit at a single frequency; however, a laser medium with a broad emission spectrum, such as a laser dye or luminescent glass, can produce a tunable laser combined with a spectroscopic system, such as a grating or prism.