Self-modulation oscillation regimes in fibre lasers with microoptomechanical resonance structures

Self-modulation oscillation regimes are studied in erbium fibre lasers with intracavity microoptomechanical structures (microoscillators) of different types, namely, based on silicon structures and consisting of special waveguide segments. Optical excitation of acoustomechanical vibrations of microoscillators is accomplished using photothermal effect or light pressure. Under the conditions of resonance interaction, i.e., when the eigenfrequencies of microoscillators coincide with the frequencies of relaxation oscillations or with those of intermode beats, the dependences of self-oscillation characteristics on the system parameters are found and the stability of the self-modulation frequency within 10^-4 — 10^-6 is obtained at relatively low (40 — 300) Q-factors of microoscillators. The possibility to construct multivariate (multichannel) fibreoptical sensors of physical quantities with frequency division of measurement channels is demonstrated.