Analog and Digital High-speed modulation of Quantum-cascade laser

Rainer Martini, Claire F. Gmachl, Roberto Paiella, Federico Capasso, Chris Glazowski, Robert Murawski, Edward A. Whittaker, Clyde G. Bethea, Harold Y. Hwang, Deborah L. Sivco, James N. Baillargeon, Alfred Y. Cho, H. C. Liu

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


In this paper we present measured modulation responses on quantum-cascade lasers (QCL) up to 10 GHz. The obtained modulation response shows a flat response over the whole frequency range, proving the broadband capabilities of these devices. Even more striking is the absence of a strong resonance peak, which demonstrates the absence of relaxation oscillations, a feature which often limits the high speed performance of standard diode lasers. This property is quite attractive for use of these devices as high-speed data sources, particularly in applications where linearity is important. To address this possible application, the digital modulation properties of these devices were tested in a standard bit error-rate-measurement at 2.5 GBit/s for cryogenically cooled QCL, showing the suitability of QCLs in digital as well as analog telecommunication application. In addition we present recent data showing bit error measurements and eye diagrams obtained for the pulsed mode operation of QCL near room-temperature.

Original languageEnglish (US)
Pages (from-to)169-175
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2003
EventNovel In-Plane Semiconductor Lasers II - San Jose, CA, United States
Duration: Jan 27 2003Jan 29 2003

All Science Journal Classification (ASJC) codes

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


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