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Tuning, temporal, and spectral characteristics of the green (λ~549 nm), holmium-doped fluorozirconate glass fiber laser

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4 Author(s)
Funk, David S. ; Everitt Lab., Illinois Univ., Urbana, IL, USA ; Stevens, S.B. ; Wu, S.S. ; Eden, J.G.

The output power, tuning and temporal behavior of the green (539-550 nm), Ho-doped fluorozirconate glass (ZBLAN) fiber laser pumped in the red (λ~643 nm) has been examined in detail. Fibers ranging in length from ~20-86 cm have been studied, and more than 38 mW of output power has been obtained from a 21 cm long fiber for 30% output coupling and 280 mW of absorbed pump power. By inserting two prisms into the optical cavity, the oscillator has been tuned over ~11 mn, and the emission spectrum of the free-running laser has been recorded as a function of pump power at both room temperature and 77 K. The self-pulsing (spiking)behavior of the laser and the influence of depletion of the Ho3+ ground state (5I8) population on the emission spectrum and efficiency of this system are discussed

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Quantum Electronics, IEEE Journal of  (Volume:32 ,  Issue: 4 )