DEVICE FOR ADJUSTMENT OF FIBER LASER GENERATION WAVELENGTH Russian patent published in 2020 - IPC H01S3/67 G02F1/01 G02B6/00 

FIELD: optical instrument making.

SUBSTANCE: device for tuning the wavelength of generation of a fiber laser includes fiber Bragg gratings (FBG) as mirrors which form a fiber laser resonator, located in cores of a multi-core light guide, which on both sides is fixed by means of glue in ceramic ferues, one of which is moved by means of linear translator, and the second one is fixed. Section of fiber with FBG located between two ferulae is located in the third ceramic ferrule with possibility of free movement in it. Weak-reflecting FBGs are placed in the central core of multi-core fiber, and high-reflecting FBG – in peripheral cores, wherein the number of weakly reflecting FBG should be equal to the number of high-reflecting FBGs, which are made one by one in peripheral cores with different reflection wavelengths, wherein reflection wavelengths of the high-reflecting – low-reflecting FBG pair in the initial position must be matched to achieve synchronous adjustment by stretching / contracting the multi-core light guide.

EFFECT: technical result consists in enabling linear dependence of the wavelength tuning value on the fiber deformation value.

1 cl, 3 dwg