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We fabricated a fiber-connector-type saturable absorber in which SWNTs and P3HT (poly-3-hexylthiophene) were coated on the connector end. The pulse width was 147 fs and the repetition rate reached as high as 51 MHz.
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.
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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