Quasi-three-level laser operation of Yb:YAG waveguides

Large, A.C., Hanna, D.C., Jones, J.K., Shepherd, D.P., Tropper, A.C., Chandler, P.J., Townsend, P.D., Zhang, L., Chartier, I., Ferrand, B. and Pelenc, D. (1993) Quasi-three-level laser operation of Yb:YAG waveguides At QE-11: 11th National Quantum Electronics Conference, United Kingdom. 30 Aug - 02 Sep 1993.


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The main advantage of using waveguides in laser systems is that they produce high pump intensities over long interaction lengths for low input pump powers. This should lead to lower thresholds and more efficient lasers. Often though extra loss due to waveguide propagation reduces the benefits of this confinement. However in three-level and quasi-three-level laser systems there already exists absorption loss at the laser wavelength due to thermal population of the lower laser level. Any added waveguide propagation loss will therefore not have such a significant effect on laser performance. An example of such a laser system is Yb:YAG where 4% of the total population resides in the lower laser level. For a 6.5 at.% doped sample this is roughly equivalent to a propagation loss of 2.5db/cm which for the guides discussed here is the main contribution to the loss. The laser performance of Yb:YAG has been measured in planar waveguides made by two methods - ion-implantation and epitaxial growth.

Item Type: Conference or Workshop Item (Paper)
Venue - Dates: QE-11: 11th National Quantum Electronics Conference, United Kingdom, 1993-08-30 - 1993-09-02
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ePrint ID: 77308
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Date Event
Date Deposited: 11 Mar 2010
Last Modified: 18 Apr 2017 20:31
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/77308

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