Chirp-enhanced direct modulation of a monolithic sub-Terahertz dual laser transmitter

Z. Yang, A. Wonfor, A. H. Quarterman, R. V. Penty, I. H. White, F. Van Dijk

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

3 Citations (Scopus)

Abstract

A technique enabling 10 Gbps data to be directly modulated onto a monolithic sub-THz dual laser transmitter is proposed. As a result of the laser chirp, the logical zeros of the resultant sub-THz signal have a different peak frequency from that of the logical ones. The signal extinction ratio is therefore enhanced by suppressing the logical zeros with a filter stage at the receiver. With the aid of the chirp-enhanced filtering, an improved extinction ratio can be achieved at moderate modulation current. Hence, 10 GHz modulation bandwidth of the transmitter is predicted without the need for external modulators. In this paper, we demonstrate the operational principle by generating an error-free (bit error rate less than 10-9) 100 Mbps Manchester encoded signal with a centre frequency of 12 GHz within the bandwidth of an envelope detector, whilst direct modulation of a 100 GHz signal at data rates of up to 10 Gbps is simulated by using a transmission line model. This work could be a key technique for enabling monolithic sub-THz transmitters to be readily used in high speed wireless links.

Original languageEnglish
Title of host publication2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013
PublisherIEEE
Pages60-63
Number of pages4
ISBN (Print)9781467360715
DOIs
Publication statusPublished - 27 Jan 2014
Event2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013 - Alexandria, VA, USA United States
Duration: 28 Oct 201331 Oct 2013

Conference

Conference2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013
CountryUSA United States
CityAlexandria, VA
Period28/10/1331/10/13

Keywords

  • chirp modulation
  • millimeter wave integrated circuits
  • photonic integrated circuits
  • submillimeter wave communication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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