title: High-power "Watt-level" CW operation of diode-pumped 2.7 aem fiber lasers using efficient cross-relaxation and energy transfer mechanisms.
abstract: We report the demonstration of high power (660 mW) CW operation of a diode-pumped mid-IR Er fiber laser. This was achieved by using efficient depopulation of the lower laser level via enhanced cross-relaxation between Er ions and energy transfer to Pr ions (at doping densities much higher than those used previously in Er:ZBLAN), along with optimal pumping of such lasers via custom-designed double-clad fluoride fibers.
authors.forename: B
authors.initials: B
authors.lastname: Srinivasan
authors.forename: J
authors.initials: J
authors.lastname: Tafoya
authors.forename: R
authors.initials: R
authors.lastname: Jain