TY - GEN
T1 - Arrayed uni-traveling-carrier photodiodes for pulsed THz wave beam steering
AU - Che, Ming
AU - Matsuo, Yuki
AU - Kondo, Kazuya
AU - Kato, Kazutoshi
N1 - Funding Information:
This work was supported by MIC/SCOPE (#195010002), and Collaborative Research Based on Industrial Demand/JST (JPMJSK1513), and Japan Society for the Promotion of Science (JP19H02201, JP19K21977, JP20H00253).
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - An electro-optic frequency comb is heterodyne down-converted by a uni-traveling-carrier photodiode (UTC-PD) to a broad spectrum in the range from DC to THz band. As a result, a pulsed THz train with a repetition rate of 25-GHz was generated which is an envelope or averaged intensity of optical pulses. To generate steerable THz pulsed beam, we fabricated a monolithic InP substrate photonics integrated circuit that includes a uniform linear array of four InP/InGaAs UTC-PDs with integrated bow-tie antennas. Concurrently, four variable fiber-optic delay lines were employed in the demonstration setup for altering optical path length (OPL) of the propagating laser pulses in different channels, which eventually resulted in a altered time-delay of the THz pulses. Thus, with a gradient OPL of the laser pulse being adjusted for each UTC-PD, the pulsed THz wave can be continuously steered within a range of 40° at the elevation plane.
AB - An electro-optic frequency comb is heterodyne down-converted by a uni-traveling-carrier photodiode (UTC-PD) to a broad spectrum in the range from DC to THz band. As a result, a pulsed THz train with a repetition rate of 25-GHz was generated which is an envelope or averaged intensity of optical pulses. To generate steerable THz pulsed beam, we fabricated a monolithic InP substrate photonics integrated circuit that includes a uniform linear array of four InP/InGaAs UTC-PDs with integrated bow-tie antennas. Concurrently, four variable fiber-optic delay lines were employed in the demonstration setup for altering optical path length (OPL) of the propagating laser pulses in different channels, which eventually resulted in a altered time-delay of the THz pulses. Thus, with a gradient OPL of the laser pulse being adjusted for each UTC-PD, the pulsed THz wave can be continuously steered within a range of 40° at the elevation plane.
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U2 - 10.1109/MWP53341.2021.9639421
DO - 10.1109/MWP53341.2021.9639421
M3 - Conference contribution
AN - SCOPUS:85123773268
T3 - 2021 International Topical Meeting on Microwave Photonics, MWP 2021
BT - 2021 International Topical Meeting on Microwave Photonics, MWP 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 International Topical Meeting on Microwave Photonics, MWP 2021
Y2 - 15 November 2021 through 17 November 2021
ER -