SUBCOM, LLC

A system may include a first DAS station, comprising a first plurality of interrogator units to launch a first plurality of DAS signals in a first direction, wherein a first interrogator unit is configured to launch a first DAS signal at a first interrogation rate and first wavelength, wherein a second interrogator unit is configured to launch a second DAS signal at a second wavelength and second interrogation rate, less than the first interrogation rate. The system may include a loopback array, comprising a plurality of loopbacks, arranged over a plurality of spans, wherein a first set of proximate loopbacks nearest to the first DAS station are configured to route back the first DAS signal to the first DAS station, and wherein a first set of intermediate loopbacks, located further from the first DAS station, are configured to route back the second DAS signal to the first DAS station.

An optical communication system and method. The system includes a plurality of cable landing stations configured to be communicatively coupled using one or more optical communication cables in a peer-to-peer network for routing of one or more optical signals using one or more network elements. Each cable landing station includes a management device configured to determine one or more optical communication paths for routing optical signals, and a command/response optical device communicatively coupled to the management device for routing optical signals in accordance with the optical communication path. In response to receiving a request for routing at least one optical signal, the management device of each cable landing station is configured to determine at least one optical communication path for routing the optical signal in accordance with a topology map of the peer-to-peer network of the plurality of cable landing stations.

A method and a system for transmission of optical signals. The system includes one or more first switching optical devices configured to switch transmission of one or more optical signals from one or more first fiber cores to one or more second fiber cores. It includes one or more second switching optical devices configured to pass-through transmission of one or more optical signals from one or more first fiber cores to one or more third fiber cores.

Disclosed are a system and a method for configuring an optical transmission system. A process may include arranging a first ruggedized repeater on or in a first object or structure. A second ruggedized repeater may be arranged on or in a second object or structure different from the first object or structure. A third ruggedized repeater may be arranged on or in a third object or structure different from the first and second objects or structures, wherein: (i) a first distance between the first ruggedized repeater and the second ruggedized repeater and (ii) a second distance between the second ruggedized repeater and the third ruggedized repeater are equal or nearly equal and based on signal loss.

A system and a method for monitoring an optical transmission path in an optical transmission system. The optical transmission system includes a sensing and interrogation unit and a plurality of sensing units positioned on the optical transmission path. An optical signal is transmitted to the plurality of sensing units for determining a status of one or more portions of an optical communication path. A plurality of reflected signals responsive to the optical signal are received. The plurality of reflected signals are transformed in at least one of: the frequency domain and the time domain. The status of one or more portions is determined using the transformed plurality of reflected signals.

Techniques for improving gain equalization in C- and L-band (“C+L”) erbium-doped fiber amplifier (EDFAs) are provided. For example, the C- and L-band amplification sections of a C+L EDFA may be separated and configured in a parallel arrangement or a serial arrangement. For both the parallel and serial arrangements, the C- and L-band amplification sections may share a common gain flattening filter (GFF) or each amplification section may include and employ a separate GFF. Moreover, in some examples, an “interstage” L-band GFF may be located before or upstream of the L-band amplification section such that the L-band optical signal is gain-equalized or flattened prior to the L-band amplification section amplifying the L-band.

A sensing system. The sensing system may include a transmitter to launch an outbound optical signal, a clock to generate a clock signal, and a chirp subcarrier coupled to the clock and configured to generate a chirp. The sensing system may further include a code generator coupled to the clock and configured to generate a code; and an intensity modulator, arranged to modulate the outbound optical signal and coupled to receive an intensity modulator signal that is derived at least in part from the code generator.

Disclosed is a cable with multimetallic conductor structure. In some embodiments, a method of forming an optical cable may include providing a buffer tube around a plurality of optical fibers, providing a plurality of layered strength members around the buffer tube, and forming a conductive conduit around the plurality of layered strength members. The conductive conduit may include a multimetallic strip of a first metal layer and a second metal layer and, if beneficial, further layers, wherein forming the conductive conduit comprises bending the multimetallic strip from a flat configuration to a cylindrical configuration, and/or applying a metal layer via an electrolytic or hot dip process. The method may further include forming an outer insulating jacket surrounding the conductive conduit.

An undersea fiber optic cable architecture including a beach manhole (BMH) installed at a terrestrial site, a terrestrial station connected to the BMH by a terrestrial fiber optic cable, a first landing cable extending from the BMH into territorial waters adjacent the terrestrial site and connected to a first enhanced branching unit (EBU) located in the territorial waters, a second landing cable extending from the BMH into the territorial waters and connected to a second EBU located in the territorial waters, a recovery path cable connecting the first EBU to the second EBU, a first trunk cable extending from the first EBU into international waters, and a second trunk cable extending from the second EBU into the international waters.

Disclosed herein are undersea optical cable connection assemblies and systems. In some embodiments, a retainer is operable to arrange a plurality of SCFs and a plurality of microsplints, the retainer including a main body having a first section and a second section. The retainer may further include a first channel and a second channel extending through the first section, wherein a first set of SCFs extend through the first channel, and wherein a second set of SCFs extend through the second channel. The retainer may further include a third channel and a fourth channel extending through the first section, wherein a first set of microsplints extends through the third channel, and wherein a second set of microsplints extends through the fourth channel. A third set of microsplints extends through the third channel, wherein the first and third sets of microsplints are separated from one another by a padding layer.