Abstract
We demonstrate a photonic-integrated circuit for continuous-wave (cw) terahertz (THz) generation. By comprising two lasers and an optical phase modulator on a single chip, the full control of the THz signal is enabled via a unique bidirectional operation technique. Integrated heaters allow for continuous tuning of the THz frequency over 570GHz. Applied to a coherent cw THz photomixing system operated at 1.5μm optical wavelength, we reach a signal-to-noise ratio of 44dB at 1.25THz, which is identical to the performance of a standard system based on discrete components.
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