A cascadable optical amplifier arrangement having a modular base amplifier arrangement that is constructed in single-mode technology and has at least one amplifier stage. They may be associated with cyclodextrins in inclusion complexes or using a biodegradable or non-biodegradable polymer, such as PLGA, PLA, PGA or mixtures thereof in controlled release devices. The conductive layer is formed of solid mixture containing aluminum and graphite. The implement is preferably ready-to-use. The second base address is distinct from the first base address. In the case where a load not less than a predetermined value is given from the bolt 42 to the second displacement preventing protruding portion 57, the second displacement preventing protruding portion 57 is deformed and the thus deformed portion is withdrawn into an accommodating recess portion 60 provided in the stopper member 54.