ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Highly efficient Er3+: Pr3+-codoped CW fluorozirconate fiber laser operating at 2.7 µm (1994)

Schneider, J. ; Hauschild, D. ; Frerichs, Ch. ; [et al.]

Springer

International journal of infrared and millimeter waves 15 (1994), S. 1907-1922

add to mindlist on the mindlist

Details

ISSN: 1572-9559

Keywords: mid-infrared ; fiber laser ; codoping ; fluoride fiber ; erbium ; praseodymium

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We report highly efficient CW fiber lasers at 2.7µm in an Er3+-doped and weakly Pr3+-codoped fluorozirconate fiber. The fiber lasers were pumped in three pump wavelength ranges around 650, 795 and 980 nm. Higher output powers of nearly 30 mW and a broader potential tuning range of 180 nm compared to Er3+ singly doped fiber lasers are demonstrated. Laser efficiencies of more than 13% were achieved. It is shown that the fiber laser can be tuned to longer wavelengths by increasing the pump power or, in certain cases, by increasing the pump wavelength. Furthermore, we present the wavelength tuning of the Er3+:Pr3+-codoped system by an external grating. The relationships between laser wavelength and pump rates are described, and the reasons for the improvements with Pr3+-codoping are given.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02096058

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Occurrence of methylated tin and dimethyl mercury compounds in a mangrove core from Sepetiba Bay, Brazil (1992)

Quevauviller, P ; Donard, O F X ; Wasserman, J C ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Applied Organometallic Chemistry 6 (1992), S. 221-228

add to mindlist on the mindlist

Details

ISSN: 0268-2605

Keywords: Mangrove ; methylation ; organotins ; dimethylmercury ; anoxic conditions ; methyltins ; Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Analyses of organotin and organic mercury compounds have been performed in a sediment core from Sepetiba Bay, Brazil, in order to investigate possible methylation pathways in a mangrove environment. The results have revealed that the physico-chemical conditions existing in this type of environment (high organic inputs, anaerobic conditions, microbial activity, etc.) account for high methyltin concentrations (mono-, di- and trimethyltin) in the sediments, which are dependent upon the total load of metal released (e.g. from anthropogenic sources). Furthermore, the presence of dimethylmercury and not monomethylmercury in the samples demonstrated a new pathway of transformation of mercury in the environment: this compound, thought to be unstable in sediment, is assumed to be stabilized by a conjunction of factors, such as high sulphide levels, anoxic conditions and constant inputs of methane into the medium.

Additional Material: 5 Ill.