Self-similarity mode locking optical fiber femtosecond laser device based on spectrum compression and amplification

摘要: A self-similarity mode locking optical fiber femtosecond laser device based on spectrum compression and amplification is composed of an coupling output diode, a wavelength division multiplexing coupler, ytterbium-mixed monomode fiber, frequency filter, collimator, quarter-wave plate, half-wave polarization splitting prism, 45-degree reflector, grating isolator. Spectrum compressed by using the self-phase modulation generated when negative chirp pulses are amplified in narrow-band chirp-free picosecond formed, filter used for eliminating residual side lobes nonlinear compression, evolution completed broadband linear parabola directly, Fourier transformation extremity lasers after chirps eliminated. The high efficiency, large widening amount, capable obtaining energy narrow pulse width, compact structure easy to operate.