An optical fiber hydrophone is deployed underwater to detect acoustic waves (sound waves) from marine vessels. The acoustic waves create pressure variations that physically strain a coil of optical fiber, modulating the phase of a laser carrier signal traveling through its core.
Which option correctly identifies the wave type of the acoustic signal in the water, and the wave type of the laser carrier signal propagating inside the fiber?
Acoustic wave: Transverse mechanical; Laser carrier: Transverse electromagnetic\text{Acoustic wave: Transverse mechanical; Laser carrier: Transverse electromagnetic}Acoustic wave: Transverse mechanical; Laser carrier: Transverse electromagnetic
Acoustic wave: Longitudinal mechanical; Laser carrier: Longitudinal electromagnetic\text{Acoustic wave: Longitudinal mechanical; Laser carrier: Longitudinal electromagnetic}Acoustic wave: Longitudinal mechanical; Laser carrier: Longitudinal electromagnetic
Acoustic wave: Longitudinal mechanical; Laser carrier: Transverse electromagnetic\text{Acoustic wave: Longitudinal mechanical; Laser carrier: Transverse electromagnetic}Acoustic wave: Longitudinal mechanical; Laser carrier: Transverse electromagnetic
Acoustic wave: Transverse mechanical; Laser carrier: Longitudinal electromagnetic\text{Acoustic wave: Transverse mechanical; Laser carrier: Longitudinal electromagnetic}Acoustic wave: Transverse mechanical; Laser carrier: Longitudinal electromagnetic