Abstract: An electro-optic modulator is formed from all flexible materials, to form a flexible electro-optic modulator. The formation process uses a photoresist which selectively adheres to one material more than it adheres to another material. This allows selective liftoff, where only parts of the substrate are lifted off. For example, this allows silicon ends on the modulator, thereby facilitating pig tailing and also facilitates handling. Another aspect describes testing the bending radius.

Abstract: Disclosed is a multi-core optical fiber block having a block base and a cover, each of which is formed having a tree-structured groove array, so as to allow respective optical fiber arrays to be seated in the corresponding respective groove arrays. The groove arrays comprises first sub-grooves having depth and pitches decreasing in magnitude as approaching from an input end of the block to an output end, and second sub-grooves formed alternately between the first sub-grooves and having the depths and pitches increasing in magnitude as approaching from the input end of the block to the output.

Abstract: An electro-optic modulator is formed from all flexible materials, to form a flexible electro-optic modulator. The formation process uses a photoresist which selectively adheres to one material more than it adheres to another material. This allows selective liftoff, where only parts of the substrate are lifted off. For example, this allows silicon ends on the modulator, thereby facilitating pig tailing and also facilitates handling. Another aspect describes testing the bending radius.

Abstract: Disclosed is an optical fiber block having holding sub-blocks. The optical fiber block comprises: an optical fiber arrangement section having a V-groove array including a plurality of V-grooves; a stress-relieving recess section extending from the optical fiber arrangement section, the stress-relieving recess section having a flat surface on which a ribbon optical fiber is fixed, the flat surface being formed to be substantially lower than the lower ends of the V-grooves by etching; and at least one holding sub-block formed on a rear portion of the side edge of the flat surface of the stress-relieving recess section, so as to prevent the ribbon optical fiber placed on the flat surface from escaping out of the flat surface and guide the flow of epoxy resin injected toward the ribbon optical fiber.

Abstract: The present invention discloses an optical-fiber-block assembly for minimizing stress concentration. The optical-fiber-block assembly is comprised of a fiber-alignment area mounted with a plurality of V-grooves at which optical fibers are disposed and a stress-relief-depth area extending from the fiber-alignment area and formed by etching the fiber-alignment area deeper by a predetermined amount, for relieving stress that is caused by the coating thickness of the fiber, wherein the fiber-alignment area further includes: (a) a first fiber-alignment area having a first V-grooves with a constant width for receiving the bare fibers, such that the first fiber-alignment area do not contact the external side of the bare fiber, and (b) a second fiber-alignment area having a second V-grooves with a constant width extending from the first V-grooves for receiving the bare fiber, wherein the width of the first V-grooves is substantially wider than the width of the second V-grooves.

Abstract: Disclosed is a multi-core optical fiber block having a block base and a cover, each of which is formed having a tree-structured groove array, so as to allow respective optical fiber arrays to be seated in the corresponding respective groove arrays. The groove arrays comprises first sub-grooves having depth and pitches decreasing in magnitude as approaching from an input end of the block to an output end, and second sub-grooves formed alternately between the first sub-grooves and having the depths and pitches increasing in magnitude as approaching from the input end of the block to the output.

Abstract: Disclosed is an optical fiber block having holding sub-blocks. The optical fiber block comprises: an optical fiber arrangement section having a V-groove array including a plurality of V-grooves; a stress-relieving recess section extending from the optical fiber arrangement section, the stress-relieving recess section having a flat surface on which a ribbon optical fiber is fixed, the flat surface being formed to be substantially lower than the lower ends of the V-grooves by etching; and at least one holding sub-block formed on a rear portion of the side edge of the flat surface of the stress-relieving recess section, so as to prevent the ribbon optical fiber placed on the flat surface from escaping out of the flat surface and guide the flow of epoxy resin injected toward the ribbon optical fiber.

Abstract: The present invention discloses an optical-fiber-block assembly for minimizing stress concentration. The optical-fiber-block assembly is comprised of a fiber-alignment area mounted with a plurality of V-grooves at which optical fibers are disposed and a stress-relief-depth area extending from the fiber-alignment area and formed by etching the fiber-alignment area deeper by a predetermined amount, for relieving stress that is caused by the coating thickness of the fiber, wherein the fiber-alignment area further includes: (a) a first fiber-alignment area having a first V-grooves with a constant width for receiving the bare fibers, such that the first fiber-alignment area do not contact the external side of the bare fiber, and (b) a second fiber-alignment area having a second V-grooves with a constant width extending from the first V-grooves for receiving the bare fiber, wherein the width of the first V-grooves is substantially wider than the width of the second V-grooves.

Abstract: Disclosed is a method for formatting facets of an optical waveguide element.

Abstract: An optical power divider using a beam separator and a beam expander, and a fabrication method therefor. The optical power divider includes an input optical waveguide having an input port for receiving incident light, for guiding the light incident via the input port, a plurality of output optical waveguides having at least two output ports, for outputting the light incident via the input optical waveguide to the output ports, wherein the number of output optical waveguides is equal to that of the output ports, and a beam separator located at a branch area in which the light incident on the input optical waveguide diverges toward the output optical waveguides, the beam separator being made of a material having a refractive index lower than the core of the input and output optical waveguides, for separating the light to the output optical waveguides with a predetermined ratio. Therefore, the length of the optical power divider becomes short and insertion loss can be lowered.

Abstract: Disclosed is a method for formatting facets of an optical waveguide element.