Arrayed uni-traveling-carrier photodiodes for pulsed THz wave beam steering

Ming Che, Yuki Matsuo, Kazuya Kondo, Kazutoshi Kato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication2021 International Topical Meeting on Microwave Photonics, MWP 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665426107
DOIs
Publication statusPublished - 2021
Event2021 International Topical Meeting on Microwave Photonics, MWP 2021 - Pisa, Italy
Duration: Nov 15 2021Nov 17 2021

Publication series

Name2021 International Topical Meeting on Microwave Photonics, MWP 2021

Conference

Conference2021 International Topical Meeting on Microwave Photonics, MWP 2021
Country/TerritoryItaly
CityPisa
Period11/15/2111/17/21

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Instrumentation
  • Atomic and Molecular Physics, and Optics

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