Photonic generation of continuous THz wave using uni-traveling-carrier photodiode

60 Gbit/s 400 GHz wireless transmission

“…In this experiment, a single channel is generated by simply switching on one CW laser, but keeping the others off. In our experiment, a uni-travellingcarrier photodiode (UTC-PD) is used as a THz photo-mixing emitter, due to its extremely fast photo-response [22] [23]. Before launching into the UTC-PD, the optical signals are polarized to minimize the polarization dependency of the UTC-PD.…”

Continuous Wave Terahertz Systems Based on 1.5 μm Telecom Technologies

“…optical modulation speed) of p-i-n photodiodes is limited by the transit time of the photocarriers to the p-or n-contacts. A first approach towards high speed is the unitravelling-carrier (UTC) design [13]. The basic scheme of the according band structure is shown in Fig.…”

High-Power RF Uni-Traveling-Carrier Photodiodes (UTC-PDs) and Their Applications

“…For example, the F-band module could be operated up to 813 GHz (Ito et al, 2004b), and the J-band module up to 650 GHz . For the second approach, a quasi-optic UTC-PD module (Ito et al, 2005b) shown in Fig. 8 has been developed.…”

“…This is because there is no cut-off frequency for the fundamental mode signal and the higher-order-mode output is also possible in the frequency range above 347 GHz. As an example for the quasi optical approach, the UTC-PD was integrated with a wideband self-complementary log-periodic antenna (Ito et al, 2005b) as shown in Fig. 8.…”