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Time-resolved mid-infrared pump-probe measurements in a quantum cascade laser operating above threshold reveal gain recovery dynamics to be two-fold: relaxation within a stage on a sub-picosecond scale and transport between stages on a picosecond scale.
The intensity-related carrier-envelope phase dynamics of octave-spanning Ti:sapphire lasers is investigated. Taking the laser gain dynamics into account, quantitative agreement between the measured and predicted carrier-envelope phase noise resulting from pump laser noise is achieved.
A channel waveguide exhibiting internal gain under pumping is fabricated inside erbium doped oxyfluoride-silicate glass using a femtosecond laser. The waveguide cross section and refractive index contrast is controlled using a multi-scan technique.
The gain and index dynamics of a QD amplifier operating at 1.55 mum are characterized via heterodyne pump-probe measurements with 150 fs resolution. A 13 ps gain recovery time was found, promising for all-optical signal processing.
We present results in a comprehensive analysis of gain shaping from Nd:glass amplifiers in an effort to generate near 100 fs pulses in chirped pulse amplification. We discuss relative gain balance between the two media.
We report ultrafast amplification of mode-locked laser pulses down to a width of 710 fs at 20 and 80 GHz with a semiconductor optical amplifier, both devices based on the same quantum dot material.
We demonstrate possibility of multi-MeV electron acceleration and ultra-short electron bunch formation in the most basic ldquotransverserdquo geometry of an electron beam and tightly focused laser beam whereby the beams propagate normally to each other.
We demonstrate a technique of measuring Glauberpsilas normalized correlation functions for nonclassical light generated in the pulsed regime. In particular, intensity correlation functions are studied for the transition between spontaneous and stimulated parametric down-conversion.
Spectral shaping in a fiber amplifier with finite gain bandwidth (DeltalambdaFWHM~15nm) and strong self-phase-modulation (PhiNL~12pi) is studied numerically and experimentally. Pulses amplified to 30 muJ energy are dechirped to 250 fs duration.
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