Publikationsdatum:
2017-08-12
Beschreibung:
The use of Yb 3+ co-doping with Ho 3+ to enhance the Ho 3+ : 5 I 6 $\to $ 5 I 7 $\sim 2.84-\mu \text{m}$ emissions is investigated in the tellurite–germanate glasses. An intense ~ 2.84- $\mu \text{m}$ emission with a full width at half maximum (FWHM) of 132 nm is achieved in the Ho 3+ /Yb 3+ co-doped tellurite–germanate glass upon excitation at 980 nm. The glass not only possesses considerably low OH − absorption coefficient (0.206 cm $^{-1}$ ), but also exhibits 2.84- $\mu \text{m}$ large emission cross section ( $14.6\times 10^{-21}$ cm $^{2}$ ). Moreover, the measured lifetime of Ho 3+ : 5 I 6 level is as high as 0.283 ms. Results reveal that Ho 3+ /Yb 3+ co-doped Tellurite–germanate glass is an attractive host for developing a mid-infrared 3- $\mu \text{m}$ solid-state laser.
Print ISSN:
1041-1135
Digitale ISSN:
1941-0174
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik