Analysis of a narrowband terahertz signal generated by a unitravelling carrier photodiode coupled with a dual-mode semiconductor Fabry–Pérot laser

Latkowski, Sylwester; Parra-Cetina, Josué; Maldonado-Basilio, Ramón; Landais, Pascal; Ducournau, Guillaume; Beck, Alexandre; Peytavit, Emilien; Akalin, Tahsin; Lampin, Jean-François
June 2010
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p241106
Academic Journal
A narrowband terahertz signal generated by a unitravelling carrier photodiode (UTC-PD) interfaced with a dual-mode Fabry–Pérot laser diode is demonstrated. A beat tone corresponding to the free spectral range is generated on the UTC-PD, and radiated by a transverse-electromagnetic-horn antenna. A terahertz signal at a frequency of 372 GHz, featuring a linewidth of 17 MHz is recorded by a subharmonic mixer coupled to an electrical spectrum analyzer. All components involved in this experiment operate at room temperature. The linewidth and the frequency of the emitted terahertz wave are analyzed, along with their dependency on dc-bias conditions applied to laser diode.


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