Abstract: Disclosed is a coupling member that enables a joint between a wooden member and a mating member to absorb vibration energy, and a method for producing the same and a joint structure using the same. The metal coupling member is embedded in the wooden member. The wooden member is connected with a mating member by the coupling member. The coupling member includes a metal rod-like main body portion to be embedded in the wooden member, and an inner rod portion protruding from the main body portion. The inner rod portion axially extends from a protruding portion thereof to a predetermined depth in the main body portion, has a periphery separated from the main body portion to allow axial displacement of the inner rod portion relative to the main body portion, and is integrally connected to the main body portion at the deepest part thereof.

Abstract: Disclosed is a coupling member that enables a joint between a wooden member and a mating member to absorb vibration energy, and a method for producing the same and a joint structure using the same. The metal coupling member is embedded in the wooden member. The wooden member is connected with a mating member by the coupling member. The coupling member includes a metal rod-like main body portion to be embedded in the wooden member, and an inner rod portion protruding from the main body portion. The inner rod portion axially extends from a protruding portion thereof to a predetermined depth in the main body portion, has a periphery separated from the main body portion to allow axial displacement of the inner rod portion relative to the main body portion, and is integrally connected to the main body portion at the deepest part thereof.

Abstract: An optical isolator has a low-profile construction. Two rod-like permanent magnets are on two sides of a Faraday element in parallel to an optical axis. The two permanent magnets are sandwiched and fixed between two ferromagnetic frames each having a light path hole therein. The ferromagnetic frames are each provided with a protrusion for guiding the magnetic flux generated by the permanent magnets to the Faraday element.

Abstract: A thermistor assembly is formed by fixedly attaching a thermistor on to a base formed of a material having good heat conductivity and the thermistor assembly and an LD chip are fixedly attached on to a carrier arranged in contact with an electronic cooling element using brazing materials with different melting points, so that, when, for example, the thermistor is found faulty, the thermistor can be easily exchanged with a good one.

Abstract: A laser diode assembly capable of controlling a temperature of a laser diode chip with a high accuracy. A Peltier device is mounted on a base member, and a carrier is mounted on the Peltier device. On the carrier are mounted the laser diode chip, a thermistor, and a relay block. A terminal for connecting the thermistor to an external circuit is provided so as to extend through the base member. The thermistor and the relay block are connected together by wire bonding, and the relay block and the terminal are also connected together by wire bonding. The laser diode assembly further includes a control circuit for controlling a driving current for the Peltier device contacting with the carrier so as to maintain a resistance of the thermistor fixed on the carrier at a constant value.

Abstract: A rod lens fixing method which can prevent the generation of cracks in a rod lens due to annealing to be carried out after welding a lens assembly. The rod lens fixing method includes the steps of providing a flanged split sleeve having an axial slit extending continuously from one end of the flanged split sleeve to the other end thereof, the axial slit being wide enough at least a flange of the flanged split sleeve to permit laser welding; press-fitting the rod lens into the flanged split sleeve; and applying a solder into the axial slit to solder the rod lens to the flange split sleeve. This method further includes the steps of inserting the flanged split sleeve into a bore formed at one end portion of a sleeve, the bore having a diameter larger than an outer diameter of the flanged split sleeve and smaller than an outer diameter of the flange; and laser-welding the flange to one end surface of the sleeve at a plurality of points on an outer circumference of the flange and in the axial slit.

Abstract: A semiconductor laser module comprises a semiconductor laser chip for emitting a laser beam, a collimator lens for collimating the laser beam to a collimated beam, a focussing lens for focussing the collimated beam, and an optical fiber having an inclined input face to which the laser beam from the focussing lens in input. The focussing lens is arranged in such a manner that the optical axis of the collimated beam incident on the focussing lens is deviated from a center axis of the focussing lens, and the optical fiber is arranged in parallel to the collimated beam in such a manner that the laser beam is incident on an optical axis of the optical fiber.

Abstract: In an optical semiconductor device which comprises a mount (52a) for holding an optical semiconductor element (40) and a lens holder (54a) which holds a lens (50) for converting a beam shape of a light emitted from the optical semiconductor element (40) and is fixed to the mount (52a) and a production method thereof wherein at least one of locations for shrinkage by laser irradiation (58a) are provided at least on one of the mount (52a) and the lens holder (54a), and the relative positions of the optical semiconductor element (40) and the lens (50) are adjustable in any desired direction by a laser irradiation on the location for shrinkage by laser irradiation (58a).

Abstract: A photo-semiconductor module is disclosed wherein a reliable airtight condition can be obtained and an operability in assembly can be improved. The photo-semiconductor module comprises a substrate carried in a casing, a photo-semiconductor chip mounted on the substrate, and a support member carried on the substrate and having an inclined face which is inclined by an angle of 45 degrees with respect to a surface of the substrate. A semi-spherical lens is securely mounted on the inclined face of the support member, and an opening formed in a side wall of the casing is sealed airtight by a glass member while an upper portion of the casing is sealed airtight by a lid. When an optical fiber is mounted onto the casing such that an end face thereof may be located in the opening in the side wall of the casing, the optical fiber and the photo-semiconductor chip are optically coupled to each other by way of the semi-spherical lens.

Abstract: A polishing machine for polishing the end faces of ferrules supporting coaxially aligned optical fibers to be connected in an optical fiber connector. The machine has a polishing disk composed of a rotating disk with a flat face, a rubber plate fixed on the rotating disk, and a thin metal elastic plate mounted on the rubber plate. The surface of the polishing disk is capable of being indented when the end face of a ferrule is pressed against the surface of the polishing disk. So, by passing the end face of the ferrule against the rotating polishing disk, and rotating the ferrule around its axis alternately to the left and right, the end face of the ferrule is polished approximately spherically. A revolving motion may be included for the ferrule. The curvature of the polished end face is determined by the force used to press the ferrule toward the polisher and the elasticity for the polishing disk.

Abstract: An optical fiber connector structure for minimizing loss in an optical fiber connector. The connector includes cylindrical member for housing ferrule, a C-ring having a pawl positioned about the cylindrical member, and grooves formed in the cylindrical member for engaging the pawl so that the plug can engage the adapter so as to minimize loss in the connection with minimal amount of adjustment.