Abstract: An electronic interconnection apparatus adapted for interconnecting a plurality of audio equipment including several communication ports, each configured for being connected to a respective audio equipment, at least one selector configured for selecting a value of an operating parameter according to a manipulation by an operator, at least one push-to-talk button configured for authorizing the transmission of an audio signal following an operator action, and an electronic processing device connected to each selector and each push-to-talk button, configured for acquiring an input audio signal via a communication port and for delivering an output audio signal to another communication port, each communication port being according to a digital communication standard.

Abstract: The invention relates to a method and an optical-fiber measuring device including a light source with a light power P, a Sagnac ring interferometer in which propagate two counter-propagating waves, a detector receiving a light flux from the interferometer and converting it into an electrical signal representing the total phase difference ??t between the counter-propagating waves. It also includes an electronic element receiving the electrical signal from the detector and providing a first signal S1 function of the measured parameter. The electronic element includes a demodulator contributing to provide the first signal function of the measured parameter and provide a second signal S2 function of the power P of the light flux measured by the detector. The optical phase modulator generates a disturbance component ??cp adding to the phase difference ??m=??b+??cr.

Abstract: The invention relates to a method and an optical-fibre measuring device including a light source with a light power P, a Sagnac ring interferometer in which propagate two counter-propagating waves, a detector receiving a light flux from the interferometer and converting it into an electrical signal representing the total phase difference ??t between the counter-propagating waves. It also includes an electronic element receiving the electrical signal from the detector and providing a first signal S1 function of the measured parameter. The electronic element includes a demodulator contributing to provide the first signal function of the measured parameter and provide a second signal S2 function of the power P of the light flux measured by the detector. The optical phase modulator generates a disturbance component ??cp adding to the phase difference ??m=??b+??cr.

Abstract: A device for global acoustic positioning of submarine vessels (1) includes positioning elements for referencing geographically the device and a positioning acoustic signal transceiver (6). The acoustic signal transceiver (6) is an ultra short base line system (USBL) which generates n first position measurements, where n is the number of submarine vessels (1) measured simultaneously, n being greater than or equal to 1 and the device includes elements for restituting the movements of the device (10) delivering signals, real-time processing elements (11) receiving the set of measurements to determine the actual position of the submarine vessel(s) (1) and elements (12) for transmitting the actual position of the submarine vessel(s) (1) in and/or off water.

Abstract: The invention relates to a broadband light source including an amplifying guide structure (1). The light source includes a device (45) of exciting the guide structure (1). The stimulated guide structure (1) emits light (7, 8) that accepts strong spatial coherence and weak time coherence. The light (7) is transmitted forwards (2) having a spontaneous emission spectrum. The light source also includes a rear mirror (5), reflecting only for a narrower range of wavelengths than the spontaneous emission spectrum and produces emission (E) forwards (2) with an emission spectrum controlled around an average wavelength. The rear mirror is inserted between the excitation means and the guide structure.

Abstract: A process and an optical gyroscope are provided for measuring rotation speeds (S) about N axes. The light source and the photodetector are common. Controlled modulation phase differences .delta..PHI..sub.c,i COMPRISE biasing components .delta..PHI..sub.m,i (42, 45, 46) with a common modulation period T.sub.m and common amplitude. Since each half-period T.sub.m /2 is divided into N time intervals .delta.t.sub.i, a change in the sign of the biasing component .delta..PHI..sub.m,i associated with each interferometer I.sub.i is produced at the beginning of one and only one .delta.t.sub.i time interval. Sagnac phase shifts .delta..PHI..sub.s,i are obtained by sampling a signal on the N time intervals.