Tuned cascade laser

Jianfeng Li, Darren D. Hudson, Stuart D. Jackson

Research output: Contribution to journalArticlepeer-review


Tuning of a diode-cladding-pumped cascade Ho3+ -doped fluoride fiber laser is demonstrated using a single plane ruled diffraction grating. At the maximum available pump power, a tuning range 2955-3021 nm, an output power of >500 mW, and a bandwidth of <1nm was achieved for tuning across the 5|6 -> 5|7 transition. In a separate experiment, the  5|7 -> 5|8 laser transition was tuned from 2064 to 2082 nm (with a bandwidth of <0.5 nm) which simultaneously shortened the average emission wavelen 5|6 -> 5|7 length of the free-running  laser transition of the cascade from 2.959 to 2.954 µm. This demonstration represents the first fiber laser that can tune beyond 3 µm.

Original languageEnglish
Pages (from-to)1215-1217
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number14
Publication statusPublished - 15 Jul 2012


  • erbium lasers
  • fiber lasers
  • fluoride glass


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