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Few-cycle carrier-envelope phase (CEP) stable laser pulses enable the precise control of strong-field electron dynamics, such as high-harmonic generation in gases and solids or electron emission in nano-structures [1]. The intrapulse difference-frequency generation (DFG) pumped by a broadband pulse is a reliable method of producing passively CEP-stable pulses. Mid-infrared (mid-IR) pulse generation...
In cavity-enhanced OPCPA, nonlinear phase shifts imparted on the intracavity pump pulse limit pump power loading and degrade system performance. We show that cavity-locking offsets these effects, maintaining dramatic bandwidth extension and high conversion efficiency.
We demonstrate high optical-to-THz conversion efficiency of 3.8% by optical rectification in cryogenically-cooled lithium niobate using near-optimum 680 fs, 1.2 mJ pump pulses centered at 1 μm. Spatial and temporal characterization will be presented.
In a cavity-enhanced optical parametric chirped-pulse amplifier, natural instabilities arise due to the interplay of pump depletion and dispersion when pulse durations longer than the pump to signal/idler walk-off lengths are used.
We report on a kHz, mJ-level, ultrabroadband, phase-stable 2.1-μm OPCPA for high-flux water-window high-order harmonic generation. The final stage is pumped by a high-energy, 15-ps cryogenic Yb:YAG CPA laser optically synchronized to the signal.
We report on the development of a 50-mJ-class ~10-ps chirped-pulse amplifier at kHz repetition rates using cryogenic Yb:YAG regenerative and multi-pass amplifiers. The system is well suited as pump laser for kHz high-average-power ultra-broadband OPCPAs.
We summarize recent progress in low-cost and highly-efficient Cr:Colquiriite laser technology. Pumping with inexpensive single-mode diodes, 270-mW of output power and a total tunability from 754 to 1042 nm were demonstrated in continuous-wave operation. In mode-locked operation, 100-fs pulses with 50-nJ pulse energy were demonstrated.
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