Radiative Transition Properties of Tm3+ in Aluminum Germanate Glass for FWW Waveguide Amplifier

Abstract:

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Dominant 794nm wavelength upconversion emission, which originates from the Tm3+: 3H4®3H6 transition, has been recorded in Tm3+/Yb3+ codoped aluminum germanate glass under the 974nm wavelength laser excitation. Judd-Ofelt parameters W2 (6.52´10-20cm2), W4 (9.83´10-21cm2) and W6 (1.02´10-20cm2) indicate a higher inversion asymmetric and stronger covalent environment in the glass material. The spontaneous transition probability of 3H4®3H6 was derived to be 1121s-1, which is responsable for obtaining the powerful 794nm emission. K+-Na+ ion-exchanged multimode channel waveguide amplifiers have been fabricated based on the Tm3+/Yb3+ codoped aluminum germanate glass substrate. The relative gain coefficient of a 2.20cm channel waveguide was determined to be 1.58dB/cm at a signal wavelength of 810 nm under 457mW 980nm laser diode excitation.

Info:

Periodical:

Advanced Materials Research (Volumes 239-242)

Edited by:

Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He

Pages:

2352-2355

DOI:

10.4028/www.scientific.net/AMR.239-242.2352

Citation:

J. Zhang et al., "Radiative Transition Properties of Tm3+ in Aluminum Germanate Glass for FWW Waveguide Amplifier", Advanced Materials Research, Vols. 239-242, pp. 2352-2355, 2011

Online since:

May 2011

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$35.00

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