Ultrafast serrodyne optical frequency translator

Abstract The serrodyne principle enables an electromagnetic signal to be frequency shifted by applying a linear phase ramp in the time domain. This phenomenon has been exploited shift signals radiofrequency, microwave and optical regions of spectrum over ranges up few gigahertz, for example, analyse Doppler radiofrequency noise suppression stabilization. Here we employ this centre high-power femtosecond laser pulses range several terahertz with help nonlinear multi-pass cell. We demonstrate our method experimentally shifting central wavelength state-of-the-art 75 W comb from 1,030 nm 1,060 1,000 nm. Furthermore, show that wavelength-shifting technique supports coherence characteristics at hertz-level while improving temporal pulse quality. is generally applicable wide parameter different systems, enabling efficient conversion lasers spectral beyond gain bandwidth available platforms.