Broadband Optoelectronic Frequency Response Measurement Utilizing Frequency Conversion

Min Xue, Minghui Lv, Qi Wang, Beibei Zhu, Changyuan Yu, Shilong Pan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

A broadband optoelectronic (O/E) frequency response measurement method utilizing photonics-based frequency conversion is proposed and experimentally demonstrated. It is characterized by a sub-kilohertz frequency resolution and a doubled measurement bandwidth compared with the RF frequency sweeping range and the working bandwidth. A carrier-frequency-shifted optical double-sideband (ODSB) signal is produced by employing a dual-drive Mach-Zehnder modulator (DD-MZM) and stimulated Brillouin scattering (SBS). Then, a photodetector (PD) under test receives and converts the optical signal into a photocurrent. By detecting the frequency up- A nd down-conversion components generated by the two first-order sidebands and the optical carrier, the O/E frequency responses in the low- A nd high-frequency regions are achieved. After stitching the two measured responses together, an O/E frequency response with a frequency range that is twice the bandwidth of the input microwave signal is obtained. In an experiment, the O/E frequency response of a commercial high-speed PD is precisely characterized with a frequency resolution up to 5.55 MHz. A frequency bandwidth of 66.8 GHz (0.1-66.9 GHz) is achieved by using a 25-GHz DD-MZM. The measured O/E frequency response is coincident with that measured by a commercial instrument.

Original languageEnglish
Article number9436049
JournalIEEE Transactions on Instrumentation and Measurement
Volume70
DOIs
Publication statusPublished - May 2021

Keywords

  • Microwave photonics (MWP)
  • optical variables measurement
  • optoelectronic (O/E) frequency response measurement
  • photonics-based frequency conversion
  • stimulated Brillouin scattering (SBS)

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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