Passively Mode-Locked 2.7 and 3.2 μm GaSb-Based Cascade Diode Lasers

Tao Feng, Leon Shterengas, Takashi Hosoda, Gela Kipshidze, Alexey Belyanin, Chu C. Teng, Jonas Westberg, Gerard Wysocki, Gregory Belenky

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The passively mode-locked type-I quantum well cascade diode lasers operating near 2.7 and 3.2 μm generated trains of the ∼10 ps long pulses with average power up to 10 mW. The devices based on laser heterostructures with reinforced carrier confinement requires increased reverse bias voltages applied to absorber sections to operate in mode-locked regime. The autocorrelation measurements showed that lasers generated strongly chirped pulses with temporal width an order of magnitude above transform limit. The application of the external feedback led to narrowing of the laser emission spectra accompanied by an order of magnitude reduction of the intermodal beat note linewidth. The multiheterodyne beat notes have been observed for devices stabilized by external feedback.

Original languageEnglish (US)
Article number8981955
Pages (from-to)1895-1899
Number of pages5
JournalJournal of Lightwave Technology
Issue number7
StatePublished - Apr 1 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


  • Cascade lasers
  • GaSb
  • mode-locked lasers
  • optical frequency comb
  • quantum wells
  • semiconductor lasers


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