fiber 10 after the fiber coating die 12 but prior to the fiber entering the uv cure stage 13 14 15 in this embodiment a plurality of transducers are placed circumferentially around the fiber 10 to effect an even peripheral cure around the fiber 10 although one transducer may be used it is preferred to have at least two transducers 11 a positioned 180 degrees to each other at opposite sides of the fiber 10 or have three transducers positioned 120 degrees to each other in this embodiment the tips of the transducers 11 a should make contact with the coating to ensure optimum cure performance it should be noted that as an alternative to the above preferred embodiment it is also contemplated that instead of using a combination of transducers 11 a as described above a single transducer 11 a can be used with an annular collar not shown in this embodiment the fiber passes through an annular collar which acts as a cylindrical resonator to effect resonation in the fiber 10 coating it is preferred that the interior surfaces of the collar be coated with a lubricant which is compatible with the coating material to ensure that the coating does not stick to the inside of the collar an example of such a coating would be teflon u00ae in this configuration a single or multiple transducer 11 a is coupled to the collar thus preventing the need for the transducer 11 a to be contacting the coating in yet other embodiments of the present invention a transducer 11 can be added to.