Abstract: A method of drawing an optical fiber in which a glass optical fiber is drawn while fusing by heating and pulling by a pulling mechanism one end of an optical fiber preform made of glass, includes drawing the glass optical fiber from the one end of the optical fiber preform while controlling a drawing speed to make an external diameter of the glass optical fiber larger than an external diameter of a product-to-be glass-optical fiber to be used to manufacture a product. The method includes adjusting an external diameter of the glass optical fiber to an external diameter passable through a die for forming a coating. The method also includes arranging the die around the glass optical fiber having the external diameter passable through the die.

Abstract: A method of drawing an optical fiber in which a glass optical fiber is drawn while fusing by heating and pulling by a pulling mechanism one end of an optical fiber preform made of glass, includes drawing the glass optical fiber from the one end of the optical fiber preform while controlling a drawing speed to make an external diameter of the glass optical fiber larger than an external diameter of a product-to-be glass-optical fiber to be used to manufacture a product. The method includes adjusting an external diameter of the glass optical fiber to an external diameter passable through a die for forming a coating. The method also includes arranging the die around the glass optical fiber having the external diameter passable through the die.

Abstract: A method of processing an optical fiber includes introducing fiber that has passed a pulling mechanism to a shredding unit with an introducing unit. The introducing unit includes a movable unit including a notch configured to fit with a capstan roller included in the pulling mechanism, a sliding mechanism that attaches the movable unit slidably with respect to a main body of the introducing unit, and a restoring mechanism configured to restore the movable unit to an initial position when the movable unit has slid. The method includes shredding the fiber introduced by the introducing unit into fiber pieces, and suctioning, carrying, and collecting the fiber pieces. A method of drawing an optical fiber includes drawing the fiber while controlling a drawing speed, adjusting a diameter of the fiber to a diameter passable through a die, and arranging the die around the fiber having the diameter passable through the die.

Abstract: An apparatus includes: an introducer to introduce a glass optical fiber that has passed a pulling mechanism pulling, to draw the glass optical fiber, one end of an optical fiber preform that has been fused by heating; a shredder including a casing connected to the introducer and a shredding mechanism to shred the glass optical fiber introduced by the introducer in the casing into glass optical-fiber pieces; a pipe connected to the casing of the shredder and to carry the glass optical-fiber pieces; and a suction unit connected to the pipe and to suction the glass optical-fiber pieces via the pipe.

Abstract: An apparatus includes: an introducer to introduce a glass optical fiber that has passed a pulling mechanism pulling, to draw the glass optical fiber, one end of an optical fiber preform that has been fused by heating; a shredder including a casing connected to the introducer and a shredding mechanism to shred the glass optical fiber introduced by the introducer in the casing into glass optical-fiber pieces; a pipe connected to the casing of the shredder and to carry the glass optical-fiber pieces; and a suction unit connected to the pipe and to suction the glass optical-fiber pieces via the pipe.

Abstract: A controller of an optical axis aligning apparatus carries out quadric surface approximation with a plane parallel to a connecting end face of an optical component or an optical fiber, in order to align the emission axis of the optical component and the optical axis of the optical fiber in connecting the component and the fiber, and then carries out quadric function approximation in the direction of an axis perpendicular to the plane related to the quadric surface approximation, thereby securely finding a maximum light quantity point at a lower frequency of stage operation in the aligning apparatus to shorten the tact time for optical axis alignment.

Abstract: The present invention provides a method of making a semiconductor laser module, the method having a first step of regulating the attitude of a package such that the lens fixation end face of the package will have a predetermined angle relative to a predetermined reference axis, a second step of placing a condensing lens on the lens fixation end face of the package, a third step of detecting the inclination of the laser beam passed through the condensing lens relative to the reference axis, a fourth step of fixing the condensing lens to the lens fixation end face at a position wherein the inclination of the laser beam relative to the reference axis falls within a predetermined range of angle and moving the condensing lens to the position if the inclination is out of the predetermined range of angle, thereby fixing the condensing lens to the lens fixation end face at that position, and a fifth step of aligning and fixing the optical fiber such that the desired amount of laser beam passed through the fixed conde

Abstract: An optical fiber array includes a plurality of optical fibers which are arranged and fixed in a fiber array member. The optical fibers each have an end projecting from an end face of the fiber array member at substantially the same distance, and each have a lens formed at the end thereof.

Abstract: A quartz-based optical fiber with a lens, wherein a lens shaped in a curved surface is directly formed on an end surface, and its manufacturing method are provided, the quartz-based optical fiber with a lens having a lens section formed by a projecting core shaped in a curved surface on the end surface, the lens section being produced by immersing the end surface section of the quartz-based optical fiber, which consists of a core and a clad having a composition in which the etching speed is higher than that of the core when a hydrofluoric acid solution is applied, in the hydrofluoric acid solution to cause a core shaped in a truncated cone to project from the end surface of said quartz-based optical fiber, then heating and melting the core shaped in the truncated cone and the vicinity thereof, thus changing the truncated cone shape into a curved surface shape.