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A novel Er:fiber/Ti:sapphire hybrid laser generates phase-locked few-cycle terahertz transients tunable from 1 to 107 THz and electric fields of up to 108 MV/cm. 8-fs pulses from the fiber laser serve as electro-optic probe.
New configurations for phase locking and beam combining very large laser arrays with intra-cavity polarization elements are presented. We demonstrated efficient phase lock of 24 Nd:YAG lasers and beam combining of 5 lases.
A Nd:YVO4 laser was locked with a chirped volume Bragg grating. Tuning was performed from 1063 nm to 1065 nm by grating translation with 4 W maximum output power. With Cr:YAG, Q-switched pulses with 17 ns, 8 muJ were achieved.
Arbitrary single-frequency CW-THz-wave generator based on two-independent femtosecond fiber-combs is presented. Continuous tuning of a 120-GHz CW wave was demonstrated across several MHz, which is limited by electric bandwidth of THz- for evaluation.
Quasi super continuum generation at 1.1-1.4 mum is demonstrated using ultrahigh speed wavelength tuning of femtosecond soliton pulses for the first time. The center wavelength, bandwidth, and spectrum shape can be changed arbitrarily.
Continuous wavelength tunablity is demonstrated in all-normal-dispersion Yb-doped mode-locked fiber laser with a birefringent filter. The mode-locking is self-started and stable. The center wavelength can be tuned from 1024.5 nm to 1070.8 nm.
Ultra-short pulse compression for tunable mode-locked Ti:sapphire lasers is demonstrated by utilizing a 1-mum-diameter tapered fiber with grating pairs. For 100 fs input pulses at the 880-nm center wavelength, the optical bandwidth is broadened from 14 nm to 45 nm after propagating through the 1-cm long tapered fiber. After passing through the grating pairs with 1.6 cm separation, the final pulse...
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