Semiconductor saturable absorber mirror passively Q-switched 2.97 μm fluoride fiber laser

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A diode-cladding-pumped mid-infrared passively Q-switched Ho3+-doped fluoride fiber laser using a reverse designed broad band semiconductor saturable mirror (SESAM) was demonstrated. Nonlinear reflectivity of the SESAM was measured using an in-house Yb3+-doped mode-locked fiber laser at 1062 nm. Stable pulse train was produced at a slope efficient of 12.1% with respect to the launched pump power. Maximum pulse energy of 6.65 μ J with a pulse width of 1.68 μ s and signal-to-noise ratio (SNR) of ∼50 dB was achieved at a repetition rate of 47.6 kHz and center wavelength of 2.971 μ m. To the best of our knowledge, this is the first 3 μ m region SESAM-based Q-switched fiber laser with the highest average power and pulse energy, as well as the longest wavelength from mid-infrared passively Q-switched fluoride fiber lasers.

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Original languageEnglish
Article number065102
Number of pages6
JournalLaser Physics Letters
Issue number6
StatePublished - 1 Jun 2014

Bibliographic note

Funding: National Nature Science Foundation of China (Grant No. 61377042, 61107037 and 61327004) and European Commission’s Marie Curie International Incoming Fellowship (Grant No. 911333)


  • fluoride fiber lasers, mid-IR fiber laser, Q-switching, SESAM

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