Abstract: A method for determining core positions of an optical element array is provided, including the steps of causing white light to be incident on a first end face of an optical element of an optical element array including at least one optical element that is aligned and secured on a substrate, imaging light passing through the at least one optical element which is emitted from an opposed second end face of the at least one optical element using imaging means, and determining a core position of the at least one optical element based on a resulting image. The emitted light is imaged by the imaging means at an imaging distance where a diameter of the emitted light in the resulting image is as small as possible.

Abstract: A lensed fiber array is provided with lensed fibers whose front end faces are formed in a lens shape, a substrate in one of whose faces a plurality of grooves respectively matching said lensed fibers are formed, and a fixing member which aligns and fixes said lensed fibers by suppressing them against the grooved face of the substrate. The substrate, lensed fibers, and the fixing member are fastened to one another with adhesive. The front end faces of the lensed fibers are protruded from the front end face of either the substrate or the fixing member. This lensed fiber array can prevent deterioration in optical characteristics by preventing the adhesive from sticking to the front end faces of the lensed fibers.

Abstract: There are provided a method for determining core positions of an optical fiber array capable of simply determining core positions of optical elements on the substrate with high accuracy, and an apparatus therefor. The apparatus includes a stage for moving an optical fiber array in which one or more optical fibers are aligned and secured in a predetermined direction, a light source for causing white light to be incident on one end face of the optical fiber, imaging means for imaging light emitted from other end face of the optical fiber, and a control section for controlling position of the stage and imaging means, and determining a core position of each optical fiber from the image imaged by the imaging means; the control section calculating an image distance to make the diameter of the emitted light displayed on the other end face of the optical fiber in the image minimum.

Abstract: This is a lensed fiber array provided with lensed fibers whose front end faces are formed in a lens shape, a substrate in one of whose faces a plurality of grooves respectively matching said lensed fibers are formed, and a fixing member which aligns and fixes said lensed fibers by suppressing them against the grooved face of the substrate, wherein these elements are fastened to one another with adhesive. The front end faces of said lensed fibers are protruded from the front end face of either said substrate or said fixing member. This lensed fiber array can prevent deterioration in optical characteristics by adhesive sticking to the front end faces of the lensed fibers.

Abstract: An optical fiber array has an upper substrate, a lower substrate where a V-groove is formed, and optical fibers inserted and arranged on the V-groove, the upper substrate and the lower substrate being fixed with an adhesive, and the optical fibers being fixed and aligned on the V-groove. In the optical fiber array, the upper substrate has a fiber presser substrate for pressing the optical fibers on the V-groove and a coated fiber housing substrate for housing coated optical fibers, and a housing groove for coated-optical fibers and an adhesive inflow groove portion in the direction of a fiber axis are formed in the coated fiber housing substrate. An optical fiber array is a half-pitched optical fiber array having two levels of coated optical fibers.

Abstract: An optical fiber array comprises an upper substrate and a lower substrate in which V-shaped grooves are formed, wherein optical fibers are inserted and arranged in the V-shaped grooves and are solidified using an adhesive. The lower substrate comprises a V-shaped groove section having V-shaped grooves in which the optical fibers are aligned and arranged, a covered optical fiber support section for supporting covered optical fibers, and a free buffer section located between the V-shaped groove section and the covered optical fiber support section and that is prevented from restricting the alignment and arrangement of the optical fibers, wherein the free buffer section continues with the covered fiber support section via a step. The optical fiber array allows the positional relationship between an uncovered optical fiber and a covered optical fiber to be set accurately, that can prevent its characteristics from being degraded, and that can avoid problems such as an open circuit in the fibers.

Abstract: An optical transmitting member-holding structure for holding an optical transmitting member at a given location, said holding structure comprising a holding substrate, an optical transmitting member placed on the holding substrate, a fixing substrate covering the optical transmitting member on the holding substrate, and a joining layer joining the holding substrate and the fixing substrate and fixing the optical transmitting member at said given location, said joining layer comprising an eutectic solder layer.

Abstract: An optical fiber array includes an upper substrate and a lower substrate in which V-shaped grooves are formed. Optical fibers are inserted and arranged in the V-shaped grooves and are solidified using an adhesive. The upper substrate comprises a fiber presser substrate for pressing the optical fibers in the V-shaped grooves and a covered fiber housing substrate in which covered optical fibers are housed. The lower substrate comprises a V-shaped groove section having V-shaped grooves in which the optical fibers are aligned and arranged, a covered optical fiber support section for supporting the covered optical fibers, and a V-shaped groove step section located between the V-shaped groove section and the covered optical fiber support section. The top surface and/or sides of a non-covered optical-fiber section are opened between the V-shaped groove section or the V-shaped groove step section and the coverage-removed end of the covered optical fibers.

Abstract: An optical fiber array including a V-groove substrate having a V-groove on which an optical fiber is arranged and a fiber fix substrate for fixing the optical fiber arranged on the V-grooves. In the optical fiber array according to the invention, one of the V-groove substrate and the fiber fix substrate has a concave portion into which the other substrate is arranged in such a manner that a bottom surface of the concave portion of the one substrate is connected to a bottom surface of the other substrate directly or via the optical fiber, and the concave portion has side end walls whose thickness is thicker than that of a bottom portion in which the V-grooves are formed. Moreover, side inner surfaces of the concave portion of the one substrate and side surfaces of the other substrate have a taper shape extending gradually wider toward an opening of the concave portion.

Abstract: In a retainer holding a plurality of optical transmission members at given positions, a position of an optical center of each of the optical transmission members is measured at a high measuring accuracy. In this case, a lens system forming a beam waist in its output beam is arranged so as to oppose to an end face of each of the optical transmission members, and then the output beam is input to the optical transmission member, and subsequently a position of the lens system is measured when a light intensity of a beam emanated from the optical transmission member is maximum, and thereafter a position of the optical transmission member is calculated from the measured value.