Reconfigurable monolithic quantum dot passively mode-locked lasers

Y. C. Xin, Y. Li, V. Kovanis, L. F. Lester

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


The dynamical response of a quantum dot photonic integrated circuit formed with a combination of passive and active gain cells is investigated. When these cells are appropriately biased and positioned within the multi-section laser cavity, fundamental frequency and harmonic mode-locking at repetition rates from 7.2 GHz to 115 GHz are found. Carefully engineered multi-section configurations that include a passive waveguide section significantly lower the pulse width up to 34% as well as increase the peak pulsed power by 49% in comparison to conventional two-section configurations that are formed on the identical device under the same average power. In addition an ultra broad operation range with pulse widths below ten picoseconds is obtained with a 3rd-harmonic mode-locking configuration. The fundamental design principles for using QDs in mode-locked lasers are presented to explain the observed results and to describe why QDs are particularly well-suited for reconfigurable laser devices.

Original languageEnglish
Title of host publicationNovel In-Plane Semiconductor Lasers VII
Publication statusPublished - Mar 20 2008
Externally publishedYes
EventNovel In-Plane Semiconductor Lasers VII - San Jose, CA, United States
Duration: Jan 21 2007Jan 24 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherNovel In-Plane Semiconductor Lasers VII
CountryUnited States
CitySan Jose, CA


  • Passive mode locking
  • Photonic integrated circuit
  • Quantum dots
  • Semiconductor lasers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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