Abstract: An object of the present invention is to provide a multicore non-reflective terminal portion having a small influence of reflected light on an optical transmission system and having a small number of parts, and an optical path testing method using the same. A multicore non-reflective terminal portion 70 according to the present invention includes: 2n (n is a natural number) optical fibers 71 each having a vertically polished end face on one end side and an angle-polished end face on the other end side, a 2n-core MT connector 72 that collects the 2n optical fibers 71 and is attached to the one end side of the optical fibers 71, and n-core MT connectors (73a, 73b) attached to the other end side of the optical fibers 71 for each of two groups of the 2n optical fibers 71.

Abstract: The present disclosure is an optical line test system that detects a distribution of loss points of an optical line in a longitudinal direction, using a coherent light measurement device, applies vibration to facility disposed on a path of the optical line, detects a vibration point of the optical line in a longitudinal direction upon applying the vibration, using the coherent light measurement device, and identifies the loss point based on correspondence between the detected loss point and vibration point.

Abstract: An object is to provide a monitoring device capable of acquiring ONU-specific information and connection information even in the case of an optical communication system with the MC system, and enabling optical fiber cable switching work to be finished in a short time. The monitoring device according to the present invention is a monitoring device that monitors an optical communication system in which an OLT and an ONU are connected by a communication optical fiber, and includes: an optical receiver for receiving a signal beam transmitted by the ONU from the communication optical fiber; and an OAM frame analysis unit for extracting, from the signal beam received by the optical receiver, an OAM frame at a MEG level at which the ONU and the OLT are set as monitoring end points, and acquiring a transmission source address and a MEG-ID that identifies a MEG in the OAM frame.

Abstract: An object is to provide a monitoring device capable of acquiring ONU-specific information and connection information even in the case of an optical communication system with the MC system, and enabling optical fiber cable switching work to be finished in a short time. The monitoring device according to the present invention is a monitoring device that monitors an optical communication system in which an OLT and an ONU are connected by a communication optical fiber, and includes: an optical receiver for receiving a signal beam transmitted by the ONU from the communication optical fiber; and an OAM frame analysis unit for extracting, from the signal beam received by the optical receiver, an OAM frame at a MEG level at which the ONU and the OLT are set as monitoring end points, and acquiring a transmission source address and a MEG-ID that identifies a MEG in the OAM frame.

Abstract: An optical element module is equipped with a casing, an optical element provided inside the casing, a pipe which communicates the inside of the casing to the outside, and a primary coated optical fiber which is inserted through the pipe and connected to the optical element.

Abstract: A ferrule polishing control machine has a ferrule type input part for selecting one type of ferrule from various ferrule types stored in a computer. A ferrule end face shape input part selects one type of ferrule end face shape from various types of ferrule end face shapes stored in the computer. A connector type input part selects one type of connector from various connector types stored in the computer. A ferrule polishing number input part selects from ferrule polishing numbers stored in the computer a number of ferrules to be mounted on a polishing jig for a polishing operation. A transmitting part selects polishing pressure information stored in the computer in accordance with polishing information inputted from the ferrule type input part, the ferrule end face shape input part, the connector type input part, and the ferrule polishing number input part, and transmits the polishing pressure information to a ferrule polishing machine.

Abstract: A polishing system capable of producing and controlling a plurality of types of rod-shaped members is provided. The polishing system has a control machine capable of inputting and indicating pressure processing conditions having actual pressure measurements. The control machine includes a numbers indication part for indicating the number of the rod-shaped members, a type indication part for indicating connector types, a type indication part for indicating ferrule types, a process indication part for indicating a plurality of steps, and programmed pressure for inputting and indicating programmed pressure.

Abstract: An optical connector plug according to the present invention which is joined to a front end of an optical fiber cord covering an optical fiber and which is removably inserted to one end of an optical adapter having a locking member for locking the optical connector plug in an engaged state, includes an inserted portion removably inserted to one end of the optical adapter, a plug body joined to a front end of the optical fiber cord, a locking portion formed between the plug body and the inserted portion and locked by the locking member of the optical adapter, and a rotational phase reference surface formed on the plug body away from the locking portion. The optical connector plug according to the present invention can be applied to APC optical connector plug, secure high reliability for optical cross-connecting, and also reduce cost.

Abstract: A polishing system capable of producing and controlling a plurality of types of rod-shaped members is provided. The polishing system has a control machine capable of inputting and indicating pressure processing conditions having actual pressure measurements. The control machine includes a numbers indication part for indicating the number of the rod-shaped members, a type indication part for indicating connector types, a type indication part for indicating ferrule types, a process indication part for indicating a plurality of steps, and programmed pressure for inputting and indicating programmed pressure.

Abstract: An end face polishing machine has a jig plate for supporting at least one workpiece. A polishing plate is mounted to undergo rotation and revolving movement. A polishing sheet is disposed over the polishing plate for rotation and revolving movement therewith. An elastic member having a hardness that varies with temperature is disposed between the polishing sheet and the polishing plate. A pressing unit presses the end face of the workpiece against a surface of the polishing sheet during rotation and revolving movement of the polishing plate to thereby polish the end face of the workpiece during a polishing operation. A temperature control unit controls the temperature of the elastic member during the polishing operation to thereby polish the end face of the workpiece into a spherical surface during the polishing operation.

Abstract: An optical element module is equipped with a casing, an optical element provided inside the casing, a pipe which communicates the inside of the casing to the outside, and a primary coated optical fiber which is inserted through the pipe and connected to the optical element.

Abstract: An optical connector plug according to the present invention which is joined to a front end of an optical fiber cord covering an optical fiber and which is removably inserted to one end of an optical adapter having a locking member for locking the optical connector plug in an engaged state, includes an inserted portion removably inserted to one end of the optical adapter, a plug body joined to a front end of the optical fiber cord, a locking portion formed between the plug body and the inserted portion and locked by the locking member of the optical adapter, and a rotational phase reference surface formed on the plug body away from the locking portion. The optical connector plug according to the present invention can be applied to APC optical connector plug, secure high reliability for optical cross-connecting, and also reduce cost.

Abstract: A polishing system capable of producing and controlling a plurality of types of rod-shaped members is provided. The polishing system has a control machine capable of inputting and indicating pressure processing conditions having actual pressure measurements. The control machine includes a numbers indication part for indicating the number of the rod-shaped members, a type indication part for indicating connector types, a type indication part for indicating ferrule types, a process indication part for indicating a plurality of steps, and programmed pressure for inputting and indicating programmed pressure.

Abstract: An optical fiber distribution module having a connection board, optical connector adaptors and a storage section is provided. An array of the optical connector adaptors forms the connection board, where the optical connectors connect in-use optical fibers. The storage section, located in a separate section of the module, stores optical fibers which are not-in use. The optical fiber distribution module also includes a plurality of cord sorting boards having a plurality of fiber cord passageways. The fiber cord passageways are configured to accommodate and retain at least one optical fiber such that the optical fiber is arranged between the connection board and the storage section. In addition, both the in-use and not-in use optical fibers insert into the fiber cord passageway.

Abstract: A small-size large-capacity optical switch in which the switch switching control structure is simple and the switch switching efficiency is excellent. A plurality of fiber accommodating grooves (4) are formed on a grooved board (1) and stationary side optical fibers (5) are held and aligned in the fiber accommodating grooves (4) to form a fiber array unit (8). The fiber array units (8) are laminated with a space therebetween. A master fiber (10) is arranged so as to correspond to the fiber array unit (8) of each stage and the master fiber (10) of each stage is supported and secured by a common master fiber supporter (12). Movement of the master fiber supporter (12) is controlled by fiber movement control means (13) only in a direction in which the fiber accommodating grooves (4) are aligned.

Abstract: A light pulse generator is disclosed comprising an optical main-loop, a pumped-light source, a delay optical fiber, and an optical switch controller. The optical main-loop circulates a light and includes a light mixer, a light isolator, an erbium-doped optical fiber, an optical switch, a light divider, and an optical fiber coupler. The pumped-light source generates a pumped-light and introduces the pumped-light into the optical main-loop through the light mixer. The terminals of the delay optical fiber are connected to the optical fiber coupler so as to form an optical sub-loop for spreading a pulse width of a light pulse circulating in the optical main-loop. The optical switch controller switches the optical switch to an ON-state. As a result, a positive feedback amplification is carried out in the optical main-loop and an output light pulse having a sufficiently long pulse width and sufficiently high power is picked up from the optical loop through the light divider.

Abstract: A light pulse generator is disclosed comprising an optical loop, a pumped-light source, and an optical switch controller. The optical loop includes a light mixer, a light isolator, an erbium-doped optical fiber, a light valve means, and a light divider. The pumped-light source generates a pumped-light and introduces the pumped-light into the optical loop through the light mixer. The optical switch controller progressively turns the optical switch to an ON-state using a control signal having a gentle positive slope so that the amount of a light outputted through the optical switch is gently increased in accordance with the gentle slope of the control signal. The length of time of the positive slope of the control signal equals the time which is required for circulating a light pulse through the optical loop through one cycle.