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We present angle-resolved terahertz time-domain spectroscopy (THz TDS) measurements of poly(butylene) terephthalate (PBT) and compare the results to x-ray scattering measurements. This comparison confirms that the THz TDS measurements can be correlated to the crystal structure. Further, the THz TDS measurements give insights into the binding energies of the crystal bounds.
We report on a novel electro-optic modulator that acts on the carrier-envelope-offset frequency of a femtosecond pulsed laser with negligible cross-talk to the position of the optical carrier modes. The fast response on the nanosecond time scale allows to stabilize the carrier-envelope-offset frequency with a bandwidth in excess of 1 MHz while not perturbing a potential independent stabilization of...
Liquid crystals are one of the most promising base materials for switchable devices at THz frequencies. Therefore, a precise understanding of the optical parameters is crucial. Here, we present the refractive indices and absorption coefficients for 5 CB and an isothiocyanate terminated liquid crystal over a broad frequency range from 0.3 THz to 15 THz.
In this contribution we design and analyze pulse shaping filters for use in IEEE 802.15.4a transmitters. They are developed and evaluated for channels 1-4 in the low band. We analyze the minimum requirements for IEEE 802.15.4a standard compliance and design passive filters which shape a given input pulse stream at baseband. Further, we simulate these filters by using S-parameter models of available...
Er3+-doped fiber-lasers efficiently generate frequency-combs for optical frequency metrology. 3.5 nJ energy, 35 fs duration and 100 MHz repetition-rate laser pulses are used to obtain an octave spanning frequency-comb in the visible.
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