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Tunable Terahertz Signal Generation by Chirped Pulse Photomixing

Johan Stigwall (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Andreas Wiberg (Institutionen för mikroteknologi och nanovetenskap, Fotonik)
IEEE Photonics Technology Letters (1041-1135 ). Vol. 19 (2007), 12, p. 931 - 933.
[Artikel, refereegranskad vetenskaplig]

Tunable signal generation in the gigahertz to terahertz range was demonstrated by photomixing of a chirped optical pulse and its time-delayed replica. The chirped pulses were created by chromatically dispersing femtosecond pulses from a mode-locked fiber ring laser, and frequency tuning was achieved by adjusting the time delay and/or the amount of group velocity dispersion. It is shown that the signal phase is locked to the femtosecond-laser pulses and that an extinction ratio close to 100% can be obtained. Analytical calculations on the signal chirp introduced by higher order dispersion are also presented and compared with the experimental data

Nyckelord: Fiber optics, microwave photonics, photomixing, submillimeter-wave generation



Denna post skapades 2007-06-28.
CPL Pubid: 43297

 

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