A tension sensor including an optical fibre having a Bragg grating is disclosed, the sensor including a housing and a support member shorter that the housing coaxially disposed therein and connected to the housing at one end. The fiber runs along the longitudinal axis of the housing and is connected...http://www.google.es/patents/US6276215?utm_source=gb-gplus-sharePatente US6276215 - Sensor for measuring strain
