Gain switching and active mode locking of mid-infrared quantum cascade lasers

Roberto Paiella, Federico Capasso, Claire F. Gmachl, Clyde G. Bethea, Harold Y. Hwang, Deborah L. Sivco, James N. Baillargeon, Albert L. Hutchinson, Alfred Y. Cho, H. C. Liu

Research output: Contribution to specialist publicationArticle

1 Scopus citations

Abstract

The gain switching and active mode locking of mid-infrared quantum cascade (QC) lasers was analyzed. A step-recovery diode that produced voltage pulses of approximately 90 ps at a repetition rate of 100 MHz to gain switch several QC lasers was used. A pulse duration of 89 ps was obtained accounting for the finite response time of the detection electronics. In the case of active mode locking, a 8-μm device with round-trip frequency of 11.65 GHz was used. The phase-locking of this multimode output was confirmed by the observation of a narrow spike centered at frt in the rf spectrum of quantum well infrared photodetector (QWIP) photocurrent.

Original languageEnglish (US)
Pages22-23
Number of pages2
Volume11
No12
Specialist publicationOptics and Photonics News
DOIs
StatePublished - Dec 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Paiella, R., Capasso, F., Gmachl, C. F., Bethea, C. G., Hwang, H. Y., Sivco, D. L., Baillargeon, J. N., Hutchinson, A. L., Cho, A. Y., & Liu, H. C. (2000). Gain switching and active mode locking of mid-infrared quantum cascade lasers. Optics and Photonics News, 11(12), 22-23. https://doi.org/10.1364/OPN.11.12.000022