Abstract
We experimentally demonstrate a novel use of a spatial light modulator (SLM) for shaping ultrashort pulses in time-gated amplification systems. We show that spectral aberrations because of the device's pixelated nature can be avoided by introducing a group delay offset to the pulse via the SLM, followed by a time-gated amplification. Because of phase wrapping, a large delay offset yields a nearly-periodic grating-like phase function (or a phase grating). We show that, in this regime, the phase grating periocidity defines the group delay spectrum applied to the pulse, while the grating's amplitude defines the fraction of light that is delayed. We therefore demonstrate that a one-dimensional (1D) SLM pixel array is sufficient to control both the spectral amplitude and the phase of the amplified pulses.
Highlights
Femtosecond pulse shaping is nowadays an integral part of ultrafast optics technology
We experimentally demonstrate a new spatial light modulator (SLM)-based pulse shaping technique with which a large spectral phase can be imposed on the pulse without reducing the waveform quality
Due to phase wrapping of this large group delay (GD), we create a phase grating in the frequency domain, which corresponds to a series of pulse replicas in time
Summary
This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
