Abstract-Generation of arbitrarily chirped and CEP-controlled terahertz pulses for dispersion compensation using an optical pulse shaping technique and a fan-out periodically poled crystal

Hisanari Takahashi, Yoichi Kawada, Hiroshi Satozono, Koji Takahashi, Koyo Watanabe, Takashi Inoue, and Hironori Takahashi

Fig. 1. A concept for generating phase-controlled THz pulses. THz-BS: THz beam splitter; SLM: spatial light modulator.

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-27-18-25305

We constructed a system that can generate phase-controlled terahertz (THz) pulses using a fan-out periodically poled lithium tantalate crystal and an optical pulse shaper containing a spatial light modulator. The phase of each THz frequency components could be controlled by manipulating the delay time of the corresponding optical pulses. Using the system, we generated arbitrarily group-velocity-dispersion-controlled THz pulses, where the chirp parameter was 2.53 ps2/rad between 0.6 and 1.5 THz. In addition, we generated arbitrarily carrier-envelope-phase-controlled THz pulses in the same system. Phase-controlled THz pulses may be useful for applications such as dispersion compensation.

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