Tm(3+)/Ho(3+) codoped tellurite fiber laser.
Continuous-wave and Q-switched lasing from a Tm(3+)/Ho(3+) codoped tellurite fiber is reported. An Yb(3+)/Er(3+)-doped silica fiber laser operating at 1.6 microm was used as an in-band pump source, exciting the Tm(3+) ions into the (3)F(4) level. Energy is then nonradiatively transferred to the upper laser level, the (5)I(7) state of Ho(3+). The laser transition is from the (5)I(7) level to the (5)I(8) level, and the resulting emission is at 2.1 microm. For continuous wave operation, the slope efficiency was 62% and the threshold 0.1 W; the maximum output demonstrated was 0.16 W. Mechanical Q switching resulted in a pulse of 0.65 microJ energy and 160 ns duration at a repetition rate of 19.4 kHz.
Tsang
Yuen
Y
Photon Physics Group, School of Physics and Astronomy, The University of Manchester, Manchester, UK. yuen.tsang@manchester.ac.uk
Richards
Billy
B
Binks
David
D
Lousteau
Joris
J
Jha
Animesh
A
D004867:Equipment Design; D005898:Glass; D006695:Holmium / Q000737:chemistry*; D007477:Ions; D007834:Lasers; D008027:Light; D008163:Luminescent Measurements; D012822:Silicon Dioxide; D013691:Tellurium / Q000737:chemistry*; D013932:Thulium / Q000737:chemistry*; D013997:Time Factors
D007477:Ions; D012822:Silicon Dioxide; D013932:Thulium; C026660:tellurous acid; D013691:Tellurium; D006695:Holmium