A robust, high-power amplifier design allows for generation of >1 MW, few-cycle pulses from a 100 MHz, 1550 nm Er:fiber frequency comb. With this source, we explore non-perturbative harmonic generation in the UV-visible in solids. In zinc oxide (ZnO) crystal, nearly continuous spectra spanning 200-700 nm are achieved and the dependence on the carrier-envelope-phase is observed and analyzed using carrier-envelope amplitude modulation spectroscopy (CAMS).
A high-power Er:Fiber amplifier design allows for generation of <10 fs pulses with 0.5 MW peak power from a 1.5 micron frequency comb using robust telecom technology in a turn-key package. Chi-2 and Chi-3 nonlinear optical processes result in milliwatt and multi-milliwatt infrared generation through intrapulse difference frequency generation, high contrast few-cycle pulse generation through cross phase modulation, and harmonic generation through cascaded quadratic nonlinear processes. Applications such as dual-comb electric field sampled become more accessible with the milliwatt mid-infrared radiation from our source.
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