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Advances on Optical Fiber Sensors
Fibers 2014, 2(1), 24-33; doi:10.3390/fib2010024
Article

Energy Transfer between Er3+ and Pr3+ for 2.7 μm Fiber Laser Material

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 and 1,*
Received: 1 November 2013; in revised form: 26 December 2013 / Accepted: 30 December 2013 / Published: 8 January 2014
(This article belongs to the Special Issue Advances on Optical Fibers)
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Abstract: Energy transfer mechanisms between Er3+ and Pr3+ in Er3+/Pr3+ codoped germinate glass are investigated in detail. Under 980 nm LD pumping, 2.7 μm fluorescence intensity enhanced greatly. Meanwhile, 1.5 μm lifetime and fluorescence were suppressed deeply due to the efficient energy transfer from Er3+:4I13/2 to Pr3+:3F3,4, which depopulates the 4I13/2 level and promotes the 2.7 μm transition effectively. The obvious change in J-O parameters indicates that Pr3+ influences the local environment of Er3+ significantly. The increased spontaneous radiative probability in Er3+/Pr3+ glass is further evidence for enhanced 4I11/2 4I13/2 transition. The Er3+:4I11/2→Pr3+:1G4 process is harmful to the population accumulation on 4I11/2 level, which inhibits the 2.7 μm emission. The microscopic energy transfer coefficient of Er3+:4I13/2→Pr3+:3F3,4 is 42.25 × 10−40 cm6/s, which is 11.5 times larger than that of Er3+:4I11/2→Pr3+:1G4. Both processes prefer to be non-phonon assisted, which is the main reason why Pr3+ is so efficient in Er3+:2.7 μm emission.
Keywords: 2.7 μm emission; energy transfer micro-parameters; germanate glass 2.7 μm emission; energy transfer micro-parameters; germanate glass
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Li, X.; Yang, B.; Zhang, J.; Hu, L.; Zhang, L. Energy Transfer between Er3+ and Pr3+ for 2.7 μm Fiber Laser Material. Fibers 2014, 2, 24-33.

AMA Style

Li X, Yang B, Zhang J, Hu L, Zhang L. Energy Transfer between Er3+ and Pr3+ for 2.7 μm Fiber Laser Material. Fibers. 2014; 2(1):24-33.

Chicago/Turabian Style

Li, Xiangtan; Yang, Binhua; Zhang, Junjie; Hu, Lili; Zhang, Liyan. 2014. "Energy Transfer between Er3+ and Pr3+ for 2.7 μm Fiber Laser Material." Fibers 2, no. 1: 24-33.


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