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7529020 Optical amplifier module housed in a universal cable joint for an undersea optical transmission system  
An optical amplifier module contains at least one optical amplifier. The module includes an internal housing having an outer dimension substantially equal to an outer dimension of an internal fiber...
7469104 COTDR arrangement for an undersea optical transmission system comprising multiple cable stations and multiple transmission segments  
A land-based cable station is provided for interfacing with first and second undersea transmission segments of an undersea optical transmission system. At least one first bypass optical...
7437070 Submarine observation apparatus and submarine observation system  
In each of a plurality of submarine observation apparatus ( 1 to n), a branching unit ( 63 ) branches fixed-wavelength light (λ 1 ) from an incoming wavelength-multiplexed light signal. An...
7424224 Systems and methods for placing line terminating equipment of optical communication systems in customer points of presence  
A system for delivering optical signals to and from an undersea optical cable may include a cable landing station connected to the undersea optical cable and configured to convey a wavelength...
7415211 Interconnections and protection between optical communications networks  
An optical communications system including a submarine optical communications system, a landing station associated with the submarine optical communications system, a terrestrial optical...
7346280 Bi-directional long haul/ultra long haul optical communication link  
A bi-directional configuration is employed to implement a hybrid ultra long haul (ULH)/long haul (LH) optical transmission system. The link carries ULH channels and LH channels in opposite...
7326916 Optical submarine transmission system  
A main line cable and a backup line cable are laid in a land portion in different routes. A land terminal station includes a break detecting unit that detects a break of the main line cable, and a...
7269353 Branching unit for an optical transmission system  
A branching unit for an optical transmission system, an optical transmission system and a method of operation of said branching unit ( 30 ) is disclosed having a first branch ( 38 ) and a second...
7233744 Power feed arrangement using aggregate segments  
A power feed arrangement for aggregate segments of a communications system is disclosed. In embodiments of the invention, cables are used to communicatively connect a number of landmasses, where...
7184670 Telemetry system and method for acoustic arrays  
A telemetry system includes a plurality of acoustic sensors for receiving acoustic information and generating analog signals based on the received acoustic information. A first plurality of...
7133611 Main signal controlling apparatus and method in a WDM optical communications system  
If a repeater supervisory control (SV), a pre-emphasis automatic adjustment (PE), a receiving side threshold value automatic adjustment (Vth), a transmitting side dispersion compensation value...
7120362 High power repeaters for Raman amplified, wave division multiplexed optical communication systems  
High power repeaters for use in amplifying optical data signals transmitted through undersea fiber optic cables are disclosed. Raman amplification schemes using 100 or more pump lasers are...
7113706 Systems and methods for placing line terminating equipment of optical communication systems in customer points of presence  
A system for delivering optical signals to and from an undersea optical cable may include a cable landing station connected to the undersea optical cable and configured to convey a wavelength...
7079773 Power feeding for an optical transmission system  
A method and an apparatus for optical transmission line power feed interference compensation for compensating for an electrical interference signal in a power feed conductor ( 12; 52 ) and in an...
7062169 Systems and methods for compensating for signal transients  
A system compensates for the presence of power transients. The system receives a data signal and detects the occurrence of a power transient. The system generates a threshold signal based on the...
7058305 Optical submarine communication system and surge suppressing apparatus of the optical submarine communication system  
An optical submarine communication system has a land cable connected to a terminal apparatus which is installed on land near the seashore for transmitting an optical signal and electric power. The...
7034327 Expendable oceanographic digital communications system  
A bathyphotometer system is described for detecting photoluminescent signals excited by a grid disposed in a marine vehicle. The system uses photodiodes to convert the optical signals into...
6995899 Fiber optic amplifier for oilfield applications  
A system of transmitting optical signals during a subsea oilfield operations comprises a subsea fiber optical signal carrier. The fiber optical signal carrier includes a first optical fiber having...
6934434 Circuit for switching optical paths  
First to sixth optical switches 17 to 22 are provided: in event of failure on the part of a third input/output port 33 , only the first and second optical switches 17 and 18 turn ON; in...
6895187 Branching unit and system for underwater optical communication  
A branching unit, for use in optical communication systems, has three branches A, B and C each including a connection for a power feed and several inputs/outputs for optical fibers. Optical...
6731879 Submarine communications system and landing-stage therefor  
To diminish the risk of interruption of traffic in a submarine optical cable system in the region of the shore where damage is most likely to occur, the landing-stage of the system has duplicated...
6697575 System and method for increasing capacity of long-haul optical transmission systems  
A method of increasing capacity on a long-haul undersea cable system having at least one optical fiber, said method comprising interleaving counter-propagating forward-propagating and...
6693561 System for and method of wide searching for targets in a marine environment  
An above-the-water system for and method of finding targets, both animate and inanimate, in a marine environment, especially by determining the distance and depth of targets at, above or below the...
6580541 System and method for transmitting information for amphibious traveling vehicle and system for controlling operation of the vehicle  
In order to allow an amphibious traveling vehicle to safely travel along rails on the land and in the water, or underwater even off the rails, a system for transmitting information of amphibious...
6570541 Systems and methods for wirelessly projecting power using multiple in-phase current loops  
First and second spaced apart in-phase current loops at least partially overlap in the axial direction. The first and second current loops may be first and second arrays of in-phase current loops...
6460804 Emergency vision apparatus  
An emergency supplementary vision device comprises a collapsible tube made of airtight material and having an expanded form and a compact stowed form; first and second clear members disposed at...
6437890 Laser communications link  
A laser communications link provides a downlink laser beam having a wavelength suitable for transmission through water transmitted from an aircraft or satellite to a submerged vehicle. An uplink...
6380871 System for and method of searching for targets in a marine environment  
An above-the-water system for and method of finding targets, both animate and inanimate, in a marine environment, especially by determining the distance and depth of targets at, above or below the...
6342962 Optical system for transmitting data in soliton format  
A system for transmitting signals in the form of soliton pulses over long distances using an optical conductor minimizes distortion of the transmitted soliton pulses using, in combination, a phase...
6166836 Power switching of optical fibre cable branching units  
5796504 Fiber-optic telemetry system and method for large arrays of sensors  
A telemetry system for receiving data from large arrays of sensors, in which the sensors are located in an unprotected environment, is implemented using fiber optic components. Laser sources,...
5526157 Optical submarine cable system  
A optical submarine cable system having an optical cable comprised of a main optical fiber pair and a sub optical fiber pair; a branching joint box for separating the sub optical fiber pair into a...
5444441 Electro-optical detection system for reflection free underwater images from aircraft  
An electro-optical detection system for detecting objects 12 embedded within a partially transmitting medium comprises means 20 to receive electro-magnetic radiation in two close spectral channels...
5267070 Underwater IR communication system  
An underwater communications system comprising first and second communications modules which transmit and receive data utilizing infrared radiation. Each module has a transmitter/receiver which...
5231611 Wavelength multiplexed fiber optics resonant ring hydrophone array  
A hydrophone array employing a plurality of laser sources coupled onto a single optical fiber communications link. A matching plurality of optical fiber resonant rings, each having a resonance peak...
5181135 Optical underwater communications systems employing tunable and fixed frequency laser transmitters  
The present invention uses tunable and fixed frequency lasers as an optical light source in underwater communications systems. This invention provides a high energy, short pulse length laser output...
5155707 Omni-directional hydrophone  
An omni-directional hydrophone having a pair of fiber-optic windings wrapped around a resilient ball to form a spherical acoustic sensor is provided. The fiber-optic pair has a first fiber which...
5038406 Secure two-way submarine communication system  
An arrangement for secure two-way tactical laser communications between a submarine submerged in an ocean and an airborne platform. During an initital acquisition mode, the airborne transceiver...
4995101 Secure two-way communications with submerged submarines  
A method of providing secure tactical communications between a submerged submarine and an airborne platform using a pulse-modulated blue-green laser beam. During an initial acquisition mode, the...
4980926 Voice communication unit  
A voice communication unit is mounted with respect to a full face mask to allow the wearer of the mask to communicate with others. An optical transmitter positioned inside the mask responds to the...
4956550 Sub-sea fiber optic cable location apparatus with a plurality of transponder means  
A sub-sea fiber-optic cable location indication apparatus wherein a small portion of a light signal carried by a main optical fiber cable is tapped off and is used to trigger or control a parameter...
4858068 Electronic circuit housing  
An electronic circuit housing primarily applicable to undersea transmission-line repeater equipment includes a pressure-resistant tubular steel shell provided with water-tight end walls and...
4840448 Optical fiber transmission apparatus, in particular for submarine use  
An optical fiber cable transmission apparatus includes repeater-interchanger modules each of which includes at least one interchange module or pair of drop and insert switches. The module is such...
4829597 Low solar background, high sensitivity active atomic resonance filter for underwater laser communications  
An optical atomic resonance filter using two pump lasers, a buffer gas and magnesium as an atomic vapor converts underwater signals in the Fraunhofer wavelengths in the green portion of the...
4764982 Secure communication system  
A secure communication system uses narrow beam laser transmissions from a relay station high above the surface of the earth and another station which may be a submerged submarine. Position...
4599745 Hybrid fiber optics and radio frequency telemetry apparatus for acquiring data from an underwater environment  
An apparatus having both an optical communications link and a radio frequency communications link is configured for oceanologic use so as to acquire engineering data in-water and to telemeter it to...
4436365 Data link using integrated optics devices  
A transmission link is established between remote electrical transducers, e.g., underwater, and a monitoring receiver, e.g., shore-based, over an optical fiber link using integrated optical...
4193088 Optical heterodyne system for imaging in a dynamic diffusive medium  
A system for providing an image of an object from a coherent light signal transmitted from the object through a dynamic diffusive medium is provided with a planar surface receiving the signal...
4174524 Ultra high speed gated pulse optical imaging system  
Apparatus for overcoming the effects of back scatter and forward scatter in iewing an object through a diffusive medium includes a projector for projecting successive picosecond coherent light...
4050819 Undersea ranging-communications from altitude via laser  
An optical means for detecting and/or communicating with underwater objects rom airborne platforms wherein a number of laser sources are collimated so as to illuminate a particular portion of the...
Matches 1 - 50 out of 58 1 2 >