In-band pumped Ho3+:KY3F10 2 μm laser

doi:10.1364/OL.38.000504

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

Editor: Alan E. Willner
Vol. 38, Iss. 4 — Feb. 15, 2013
pp: 504–506

In-band pumped Ho³⁺:KY₃F₁₀ 2 μm laser

Martin Schellhorn, Daniela Parisi, Stefano Veronesi, Giacomo Bolognesi, Marc Eichhorn, and Mauro Tonelli »View Author Affiliations

Optics Letters, Vol. 38, Issue 4, pp. 504-506 (2013)
http://dx.doi.org/10.1364/OL.38.000504

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Abstract

We report the first observation to our knowledge of room-temperature continuous-wave laser operation on the ${}^{5}{I_{7}} \to {}^{5}{I_{8}}$ transition of ${Ho}^{3 +}$ ions in a ${KY}_{3} F_{10}$ single crystal. Using a Tm-doped silica fiber laser operating at 1938 nm as a pump source, a maximum laser power of 1.8 W was obtained at a wavelength of $\sim 2040 nm$ for 27 W of absorbed pump power with a slope efficiency of 19.1% with respect to absorbed power. At low cavity output coupling, the lasing wavelength shifted to 2060.5 nm. The beam propagation factor ( $M^{2}$ ) was measured to be $< 1.06$ at the maximum output power, confirming fundamental transverse-mode ( ${TEM}_{00}$ ) operation. Performing a Caird analysis, we determined resonator round-trip losses and intrinsic slope efficiency of 30% and 43.8%, respectively.

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 5, 2012
Revised Manuscript: January 9, 2013
Manuscript Accepted: January 9, 2013
Published: February 12, 2013

Citation
Martin Schellhorn, Daniela Parisi, Stefano Veronesi, Giacomo Bolognesi, Marc Eichhorn, and Mauro Tonelli, "In-band pumped Ho³⁺:KY₃F₁₀ 2 μm laser," Opt. Lett. 38, 504-506 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-4-504

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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES