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We demonstrated passive timing stabilization of mode-locked Ti:sapphire and Yb-fiber oscillators. The timing jitter of two femtosecond laser pulses was 3.2 fs from 10-kHz to 1-Hz integration.
An ultrashort-pulses mode-locked ytterbium-doped fiber laser has been developed with 28.3 fs duration at 80 MHz. The dispersion was compensated by a grating pair inside the cavity and a prism pair outside the cavity.
We demonstrate injection locking of 1 and 1.5 GHz femtosecond Ti:sapphire lasers by a second, physically separate and independent 1 GHz laser. In some cases, both the pulse envelopes and optical carriers are locked.
Dynamics of laser mode of femtosecond Er-fiber lasers were investigated by using a beat signal between two mode-locked lasers. The beat linewidth was controlled to 8 mHz.
We have fixed an optical phase relation among femtosecond subharmonic pulses, and observed interferometric fringes by a video. The estimated phase noise by a movie guaranteed out-of-loop Fourier synthesis of them for long time.
Summary form only given. In recent years high-order harmonic generation has become a promising method for the production of coherent XUV or soft X-ray radiation. In this study we demonstrate a pulse width measurement of the high-order harmonic pulse using the change of the bound-free absorption by the femtosecond dynamics of field ionization. The 9th harmonic of Ti:sapphire is absorbed by neutral...
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