Yb{sup 3+},Er{sup 3+} codoped silica-based glasses for planar optical waveguide amplifiers
- Los Alamos National Lab., NM (United States)
- AT and T Bell Labs., Murray Hill, NJ (United States)
Spectroscopic properties of Er{sup 3+}-doped and Yb{sup 3+},Er{sup 3+}-codoped sodium- and alumino-silicate glasses, potential planar optical waveguide amplifier materials for 1.55 {mu}m, are investigated. With the exception of {sup 4}I{sub 1 3/2}, multiphonon relaxation is dominant for all Er{sup 3+} excited-state multiplets, allowing efficient population of the emitting {sup 4}I{sub 1 3/2} state by {sup 4}I{sub 1 1/2} excitation around 980 nm. In both glasses, multiphonon relaxation from {sup 4}I{sub 1 3/2} is negligible up to 678 K, and the respective 300 K absolute quantum yields are {similar_to}0.9 for 0.05 mol% Er{sup 3+}-doped samples under low- power {sup 4}I{sub 1 1/2} excitation. OH{sup {minus}} impurities are able to efficiently quench {sup 4}I{sub 1 3/2} excitation. Absolute {sup 4}I{sub 1 3/2} quantum yields are used to predict an optimum Yb{sup 3+},Er{sup 3+} concentration range for sensitization. Yb{sup 3+} codotation strongly enhances pump-light absorption and increases {sup 4}I{sub 1 3/2} population by almost two orders of magnitude in some samples. Relative {sup 2}H{sub 1 1/2}/{sup 4}S{sub 3/2} upconversion luminescence intensities are shown to be a sensitive measure for the substantial internal sample heating observed in Yb{sup 3+} codoped glasses.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 212691
- Report Number(s):
- LA-UR-96-0315; CONF-960137-3; ON: DE96008135
- Resource Relation:
- Conference: 11. topical meeting on advanced solid-state lasers, San Francisco, CA (United States), 31 Jan - 3 Feb 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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