FIBRE ANNULAR LASER SOURCE WITH PASSIVE FREQUENCY SCANNING Russian patent published in 2023 - IPC H01S3/10 

FIELD: laser technology.

SUBSTANCE: device relates to single-frequency fibre lasers with passive frequency scanning. The proposed invention differs from the well-known one in that it includes at least one lasing radiation control unit located between the unit for separating the amplified radiation and generation radiation, and the pumping radiation input unit along the direction of propagation of the amplified optical radiation, at least one unit for controlling the amplified radiation, which is located between the fibre optical isolator and the unit for separating the amplified radiation and generation radiation, a dense mirror, which is made with a reflection coefficient of more than 50% and is located at the end of the linear part of the fibre annular source of laser radiation with passive frequency scanning, and the second active optical fibre is made with integral laser absorption radiation of at least 40 dB, whereas the first active optical fibre is made with an integral gain of laser radiation of at least 20 dB.

EFFECT: improving the spectral stability of the output laser radiation, increasing the stability of the polarization of the output laser radiation, improving the polarization and spectral properties of the output laser radiation, expanding the spectral tuning range of the laser.

21 cl, 3 dwg