Terahertz Spectroscopy with Asynchronous Optical Sampling Using a Compact Bidirectional Mode-locked Fiber Laser

Robert D. Baker, Nezih T. Yardimci, Yi Hsin Ou, Mona Jarrahi, Khanh Q Kieu

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

1 Scopus citations

Abstract

We present a high-speed and broadband time-domain terahertz spectroscopy system based on a single bidirectionally mode-locked fiber laser. This fiber ring laser generates two optical pulse trains having slightly different repetition rates and a slowly varying repetition rate difference in free running mode, eliminating the need for servo locking electronics. Using plasmonics-enhanced photoconductive antennas for terahertz emission and detection, the system generates sufficient output photocurrent on the detector for self-triggering. Acquired spectral data show agreement with the HITRAN water absorption line data up to 1.5 THz. The use of a single compact fiber laser system with simple data acquisition demonstrates the feasibility of a portable time-domain terahertz spectroscopy system with significant reduction in size, weight, and power consumption.

Original languageEnglish (US)
Title of host publicationProceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1184-1187
Number of pages4
Volume2018-June
ISBN (Print)9781538650677
DOIs
StatePublished - Aug 17 2018
Event2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 - Philadelphia, United States
Duration: Jun 10 2018Jun 15 2018

Other

Other2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
CountryUnited States
CityPhiladelphia
Period6/10/186/15/18

Keywords

  • asynchronous optical sampling
  • fiber lasers
  • nanoantennas
  • Time-domain spectroscopy

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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