Noise Equivalent Pressure of a 1550 nm fiber laser as an underwater acoustic sensor dedicated to high depth

Bernard Orsal (1, 2) , Shiraz Ouarets (1) , René Vacher (3) , David Dureisseix (4)

1 IES - Institut d’Electronique et des Systèmes
2 TéHO - Térahertz, hyperfréquence et optique
3 L2C - Laboratoire Charles Coulomb
4 LaMCoS - Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]

High sensitivity and wide dynamic measurement range can be achieved with these detectors These properties make fiber lasers suitable for acoustic detection of seismic risks, tsunami prevention, oil prospection with large deep-sea detectors. But the free running relative intensity and frequency optical noise of the laser can limit the performance of deep-sea detector systems. In this work, the dependence on relative intensity and frequency optical noise versus acoustic frequency is discussed as a function of the acousto-optic sensitivity SAO(nm/Pa).

Domaines: Optique / photonique; Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]

Bernard Orsal, Shiraz Ouarets, René Vacher, David Dureisseix. Noise Equivalent Pressure of a 1550 nm fiber laser as an underwater acoustic sensor dedicated to high depth. 21st International Conference on Noise and Fluctuations - ICNF 2011, Jun 2011, Toronto, Canada. pp.309-312, ⟨10.1109/ICNF.2011.5994329⟩. ⟨hal-00805526⟩