50 results about "Optical transport unit" patented technology

The present invention provides byte-interleaving systems and methods for Optical Transport Unit N (OTUN) (i.e. Optical Transport Unit 4 (OTU4)) and 100 Gb/s (100 G) optical transport enabling multi-level optical transmission. The byte-interleaving systems and methods of the present invention support the multiplexing of sub-rate clients, such as 10 Gb/s (10 G) clients, 40 Gb/s (40 G) clients, etc., into two 50 Gb/s (50 G) logical flows, for example, that can be forward error correction (FEC) encoded and carried on a single wavelength to provide useful, efficient, and cost-effective 100 G optical transport today. Signaling format support allows these two 50 G logical flows to be forward compatible with an evolving OTU4 and 100 G signaling format without waiting for optical and electronic technology advancement. Signaling format support also allows an evolving standard 100 G logical flow (i.e. OTU4, 100 Gb/s Ethernet (100 GbE), etc.) to be carried as 2×50 G logical flows, 4×25 G logical flows, or other lower rate formats on a single wavelength.

According to one embodiment, an optical wiring cable including a first optical interconnection paths, a first optical transmission unit incorporated in a first connector, and configured to transmit an optical signal to the first optical interconnection paths, a first optical reception unit incorporated in a second connector, and configured to receive an optical signal from the first optical interconnection paths, a second optical interconnection paths, a second optical transmission unit incorporated in the second connector, and configured to transmit an optical signal to the second optical interconnection paths, a second optical reception unit incorporated in the first connector, and configured to receive an optical signal from the second optical interconnection paths, and a control unit configured to detect a combination of electronic apparatuses to which the first and the second connector are to be connected, and control power supply to the optical transmission units and the optical reception units.

An illumination device (1a) includes a light source unit (21) which is provided on the base end side of an insertion portion (2) to emit excitation light, a first optical transmission unit (24) which is provided from the base end side toward the front end side in the insertion portion (2) to guide excitation light from the light source unit (21) to the front end side, a fluorescent member (22) which is provided at the front end of the first optical transmission unit (24) and is excited by excitation light to emit illumination light, and a light determination unit (30) which is provided near the fluorescent member (22) to determine the amount of illumination light emitted from the fluorescent member (22) and output a determination signal. With this configuration, when laser light is irradiated from the light source unit (21) onto the fluorescent member such that illumination light is emitted from the fluorescent member (22) and is irradiated to the outside, it is possible to provide an illumination device (1a) and an endoscope apparatus (1) capable of quantitatively evaluating the amount of illumination light accurately.

Device for fastening a sensor on containers with a flexible container wall, in particular mixing bags, comprising a sensor support which is fitted with a sensor, bears against an inner wall of the container wall at least with a rear subsurface averted from the sensor, and is guided with a central piece through an opening in the container wall in which the sensor support is fixed on the container wall by a clamping part which can be connected to the central piece, in which the container wall is clamped between the rear subsurface of the sensor support and on a bearing surface, facing an outer wall of the container, of the clamping part, and in which the rear subsurface bears sealingly against the inner wall of the container wall. The sensor support can also have an electronic or optical transmit unit which is connected to the sensor, in which case the transmit unit communicates in a wireless fashion with a receive unit arranged outside the container.

The present invention provides frame-interleaving systems and methods for Optical Transport Unit K (OTUK) (i.e. Optical Transport Unit 4 (OTU4)), 100 Gb/s Ethernet (100 GbE), and other 100 Gb/s (100 G) optical transport enabling multi-level optical transmission. The frame-interleaving systems and methods of the present invention support the multiplexing of sub-rate clients, such as 10×10 Gb/s (10 G) clients, 2×40 Gb/s (40 G) plus 2×10 G clients, etc., into two 50 Gb/s (50 G) transport signals, four 25 Gb/s (25 G) transport signals, etc. that are forward error correction (FEC) encoded and carried on a single wavelength to provide useful, efficient, and cost-effective 100 G optical transport solutions today. In one exemplary configuration, a 100 G client signal or 100 G aggregate client signal carried over two or more channels is frame-deinterleaved, followed by even/odd sub-channel FEC encoding and framing. In another exemplary configuration, a 100 G client signal or 100 G aggregate client signal carried over two or more channels is received and processed by a single 100 G FEC framer, followed by frame-deinterleaving into two or more sub-rate channels.

An optical network, which includes edge and switching nodes, optically communicate information formatted into bursts that are included in one or more optical channel transport unit (OTU) frames that are based on ITU-T recommendation G.709. The overhead portion of the OTU frame can include all of the fields defined in the G.709 standard, except that the two reserved bits are used to define an OTU frame type. When the FEC function is not used, the OTU frame can be arbitrarily partitioned to carry optical burst information. The information can be either control and/or data bursts or metadata related to the optical network and/or optical burst flow. When the FEC function is used, the OTU frame is used to include optical control or data bursts or optical metadata in the payload portion of the G.709 OTU frame.

Systems and methods of compensating for the delay asymmetry of coherent optical modems in a packet optical network include measuring fill levels of one or more queues each including an elastic First-In-First-Out (FIFO) circuit used in a transport mapping scheme, wherein the transport mapping scheme is one or more of client mapping to Optical Transport Unit (OTU) and OTU mapping to Flexible OTN (FlexO); and performing adjustments in a clock based in part on the measured fill levels, wherein the adjustments are configured to reduce a Time Error (TE) in the packet network based on delay asymmetry between two nodes.

The invention discloses a method, a device and a network system for transporting an optical transport unit (OTU) by an optical transport network (OTN), relating to the network field and solving the problems of slide code channel quality degradation, and the like caused by different overload rates of optical data transmission frames in the prior art. The method provided by the technical scheme comprises the following steps: at a source node, mapping a received OTUj and data to be sent by a local OTN into an OTUk of the local OTN for transmission; and at a host node, de-mapping and transformingthe OTUk into the OTUj and extracting the carried data, wherein j and k respectively represent the rate grades of the OTU. The invention can be applied to transporting information among networks.

Transport network interfaces operate to transport for Optical Transport Unit frames over an Optical Transport Network. Besides FEC bits for the Optical Transport Unit frames, the transmitting transport network interface provides sequences of error-determining bits for the Optical Transport Unit frames sent on working and protection communications channels. There is at least one sequence for each Optical Transport Unit frame, the number of bits in the at least one sequence much smaller than the number of bits in the Optical Transport Unit frame. The receiving transport network interface determines the bit error rates for the working and protection channels from the sequences of error-determining bits without decoding said Forward Error Correction bits and can select the working and protection channels accordingly.

A video endoscope including: an elongated housing; an image sensor unit arranged in the elongated housing; an optical transmitting unit arranged in the elongated housing and connected to the image sensor unit; and a through contact device, wherein the optical transmitting unit is arranged at a proximal end of the elongated housing on the through-contact device, the through-contact device penetrates through a wall of the elongated housing and the through-contact device is arranged such that it is mounted in a hermetically sealed manner in the wall of the elongated housing.

The invention discloses an optical sensing device for restraining a voltage sensor temperature error and belongs to the field of an optical voltage sensor. The optical sensing device comprises an optical transmission unit and a Pockels phase sensing unit. The reciprocity degeneration of the Pockels phase sensing unit is caused by the inconsistency of the temperature fields and stress fields of two crystals; and the generation of a measuring error of the optical voltage sensor is caused by the influence of the non-ideal welding angle and counter shaft angle of the optical transmission unit on the magnitude of interference light intensity and feedback phase. By establishing a temperature error model of the optical transmission unit and the Pockels phase sensing unit, a novel optical base structure for counteracting additional stress birefringence in the two crystals is designed, and an angle error compensating method is provided, so that the measuring precision and temperature stability of the optical voltage sensor are increased.

The invention relates to a fast self-adaptive dispersion compensation method in a 40Gbps DWDM (dense wavelength division multiplexing) system. The fast self-adaptive dispersion compensation method specifically comprises the following steps: step A) delaying coarse regulation of an interferometer DLI (delay line interferometer) by an OTU (optical transport unit) receiver; step B) performing dispersion coarse regulation through a dichotomic method; step C) performing fine regulation through a TDC (time-to-digital converter); step D): optimizing the DLI through the receiver; and step E) monitoring through the TDC, judging whether dispersion changes or not by FEC (forward error control) error correction counting or warning and entering step B) or C) if the dispersion changes. According to the method disclosed by the invention, a coarse regulation point is fast found by using the dichotomic method, the optimal dispersion is found by adopting a mid-point method after entering the fine regulation step, the dispersion compensation time is effectively reduced, the efficiency is improved, and the defects of local optimization can be simultaneously avoided.

The invention provides a method for measuring oscillation frequency and the technical proposal of an oscillation frequency measuring device. The method comprises: the change of scattered light is transmitted to a photomuitplier specially used for photon counting through optical fiber when objects vibrate, the photomuitplier transforms optical signals into electrical signals, and then the electrical signals are transmitted to a photoelectric pulse counter; data output by the photoelectric pulse counter is transmitted to a data processing computer, and the data processing computer utilizes a photon correlation method to process the data; after that, the data is transformed by Fourier, so that power spectrum image and data of oscillation frequency distribution can be obtained. The device is provided with an optical probing unit, an optical transport unit and a data processing unit, wherein, the optical probing unit is connected with the optical transport unit which is connected with the data processing unit, the data processing unit is provided with a photomuitplier module that is electrically connected with an photoelectric pulse counting module, and the photoelectric pulse counting module is electrically connected with the data processing computer; the optical transport unit is optical fiber; the optical probing unit is an optical probing head which is a light input end of the optical fiber.

An exemplary method and apparatus are provided for a remapping of Optical Data Units of fixed size into lower order Optical Data Units of flexible size. More particularly, a transport signal which has a frame structure referred to as Optical Transport Units may be transmitted through an Optical Transport Network domain. Each Optical Transport Unit contains at least one Optical Data Unit of fixed size with an overhead section and a payload section. An edge network node of the Optical Transport Network domain receives the transport signal and remaps the at least one Optical Data Unit of fixed size into a domain-internal lower order Optical Data Unit of flexible size. Within the Optical Transport Network domain, the remapped domain-internal lower order Optical Data Unit of flexible size is transmitted as payload of a domain-internal higher order Optical Data Unit of fixed size.