Abstract: A method and system for detecting a power level of a communication light beam is disclosed. In one embodiment, a fiber optic switch beam generation element generates a communication light beam that may be received at a beam splitter. The beam splitter may be configured to produce a reflected light beam that reflects a portion of the communication light beam, while permitting at least a portion of the communication light beam to propagate through the beam splitter. A reflected light beam detector may be used to detect the reflected light beam. The power level (e.g., light energy) of the communication light beam may then be calculated based on the light energy of the reflected light beam.

Abstract: A method and system for detecting a power level of a communication light beam is disclosed. In one embodiment, a fiber optic switch beam generation element generates a communication light beam that may be received at a beam splitter. The beam splitter may be configured to produce a reflected light beam that reflects a portion of the communication light beam, while permitting at least a portion of the communication light beam to propagate through the beam splitter. A reflected light beam detector may be used to detect the reflected light beam. The power level (e.g., light energy) of the communication light beam may then be calculated based on the light energy of the reflected light beam.

Abstract: A device and method for producing an image of a fluid moving through a medium. An acoustic wave insonifies the medium to produce Doppler shifted scattering from randomly located scatterers in the moving fluid. At least eight channels of acoustic detectors detect signals reflected from the medium and the amplitudes of the scattered signal is determined at each channel for at least one Doppler shifted frequency. Time averaged channel-to-channel amplitude correlations are produced using the Doppler shifted amplitude data from which the image of the moving fluid is calculated.