High-speed operation of gain-switched midinfrared quantum cascade lasers

Roberto Paiella, Federico Capasso, Claire Gmachl, Clyde G. Bethea, Deborah L. Sivco, James N. Baillargeon, Albert L. Hutchinson, Alfred Y. Cho

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


We report on a simple technique for the generation of short pulses of midinfrared (5 and 8 μm) radiation, based on gain-switched quantum cascade lasers. In particular, an integrated step-recovery diode source (comb generator) is used to drive the lasers, properly packaged for high-speed operation. Using a fast HgCdTe detector, we measure optical pulses with duration as short as 200 ps, broadened by the detector response time, and peak power of a few tens of mW. The maximum operating temperature of these gain-switched sources is approximately 120 K.

Original languageEnglish (US)
Pages (from-to)2536-2538
Number of pages3
JournalApplied Physics Letters
Issue number17
StatePublished - Oct 25 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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