Abstract-Optical frequency switching scheme for a high-speed broadband THz measurement system based on the photomixing technique

Hajun Song, Sejin Hwang, and Jong-In Song

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-10-11767&origin=search

This study presents an optical frequency switching scheme for a high-speed broadband terahertz (THz) measurement system based on the photomixing technique. The proposed system can achieve high-speed broadband THz measurements using narrow optical frequency scanning of a tunable laser source combined with a wavelength-switchable laser source. In addition, this scheme can provide a larger output power of an individual THz signal compared with that of a multi-mode THz signal generated by multiple CW laser sources. A swept-source THz tomography system implemented with a two-channel wavelength-switchable laser source achieves a reduced time for acquisition of a point spread function and a higher depth resolution in the same amount of measurement time compared with a system with a single optical source.

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