I am. Google "fiber optic DAS" and you will find quite a lot.
http://www.aogr.com/magazine/cover-story/fiber-optic-sensors...
http://www.aogr.com/magazine/cover-story/fiber-optic-sensors...
I feel like it'd be really hard to break into this field without some data to play with. Catch-22...
If you have access/desire to share some data like this I'd love to chat more (email in bio). Sounds like an interesting problem.