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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
Femtosecond fiber CPA system based on picosecond master oscillator and power amplifier with CCC fiber
J Želudevičius1, R Danilevičius, K Viskontas
1Department of Laser Technology, Center for Physical Sciences & Technology, Savanoriu Ave 231, Vilnius, Lithuania. j.zeludevicius@ar.fi.lt
Abstract:
Results of numerical and experimental investigations of the simple fiber CPA system seeded by nearly bandwidth-limited pulses from the picosecond oscillator are presented. We utilized self-phase modulation in a stretcher fiber to broaden the pulse spectrum and dispersion of the fiber to stretch pulses in time. During amplification in the ytterbium-doped CCC fiber, gain-shaping and self-phase modulation effects were observed, which improved pulse compression with a bulk diffraction grating compressor. After compression with spectral filtering, pulses with the duration of 400 fs and energy as high as 50 µJ were achieved, and the output beam quality was nearly diffraction-limited.