Apparatus and method for monitoring vibration levels in rotatable machinery (52). In one embodiment, a system (50) includes a source (66) for generating coherent radiation (70) and a first partially transmissive, partially reflective device (90) positioned to receive radiation (70) from the source (66)...http://www.google.fr/patents/US7533572?utm_source=gb-gplus-shareBrevet US7533572 - High bandwidth fiber optic vibration sensor
