Generation of 70-fs pulses at 2.86 μm from a mid-infrared fiber laser

Robert I. Woodward, Darren Hudson, Alexander Fuerbach, Stuart Jackson

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


We propose and demonstrate a simple route to few-optical-cycle pulse generation from a mid-infrared fiber laser through nonlinear compression of pulses from a holmium-doped fiber oscillator using a short length of chalcogenide fiber and a grating pair. Pulses from the oscillator with 265-fs duration at 2.86 μm are spectrally broadened through self-phase modulation in step-index As2S3 fiber to 141-nm bandwidth and then re-compressed to 70 fs (7.3 optical cycles). These are the shortest pulses from a mid-infrared fiber system to date, and we note that our system is compact, robust, and uses only commercially available components. The scalability of this approach is also discussed, supported by numerical modeling.
Original languageEnglish
Pages (from-to)4893-4896
Number of pages4
JournalOptics Letters
Issue number23
Publication statusPublished - 1 Dec 2017


  • ultrafast lasers
  • pulse compression
  • nonlinear optics
  • fibers


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