METHOD AND DEVISE FOR STABILIZING OPTICAL POWER AND SPECTRAL COMPOSITION OF RADIATION OF FIBRE LASER OF ULTRASHORT PULSES Russian patent published in 2016 - IPC H01S3/136 H01S3/67 H01S3/83 

FIELD: physics.

SUBSTANCE: invention relates to laser engineering and is intended to provide stable generation of laser pulses of femto-picosecond range. Circuit with annular fibre laser with passive mode synchronization on nonlinear polarization evolution effect is implemented, containing polarizing optical insulator, active fibre, inflated by laser diode, two optical fiber polarization controllers, controlled by microcontroller. Stability of pulse mode is achieved due to increased stability of generation of broadband spectrum of ultrashort pulse by arranging automatic optoelectronic feedback controlled by microcontroller. For this two spectra powers (full and its part) are compared after optical filtration with reference values, previously measured microcontroller.

EFFECT: in case of power deviation from reference values microcontroller generates control signals for optical fiber polarization controllers, which provide minimum deviation of power in measuring channels from reference values, by which stable optical power pulse generation of broadband spectrum and stability is achieved.

20 cl, 1 dwg