Abstract: An optical device is provided to prevent a dicing blade form being clogged when a wafer is cut by means thereof. Further, an optical device is provided to the present invention can prevent unnecessary expansion of a resin used in the optical device. The present invention relates an optical device having a substrate and an optical waveguide layer laminated thereon. The optical waveguide layer has a first lateral surface connected to an optical fiber or an optical fiber array and a second lateral surface not connected to the same. The substrate has a lateral surface disposed on the same side as that of the second lateral surface of the optical waveguide layer. At least a portion of the second lateral surface of the optical waveguide layer is disposed in a plane different from the lateral surface of the substrate so that an exposed area of the substrate is formed between the second lateral surface of the optical waveguide layer and the lateral surface of the substrate.

Abstract: An optical waveguide structure (6) comprises a substrate (12) having a first groove array (8) and a second groove array (10) which are longitudinally spaced from each other, and an optical waveguide (14) layered on the substrate (12) between the first and second groove arrays (8, 10). Each groove array (8, 10) includes a plurality of grooves (8a-8g, 10a-10h) extending longitudinally and arranged laterally relative to each other. The optical waveguide (14) has a cladding layered on the substrate (14), and a core (14b) formed on the cladding so that, when optical fibers (2, 4) are supported and positioned on the grooves (8a-8g, 10a-10h) of the first and second groove arrays (8, 10), the core (14b) of the optical waveguide (14) is aligned with cores (2a, 4a) of the optical fibers (2, 4) at the same level in an vertical direction.

Abstract: The present invention relates to a package for containing an optical module coupled to an optical fiber and to an optical module assembly combining them. A package (6) according to the present invention has a body (10) and a lid (12). The body has a bottom panel (14) for supporting the optical module (4) and a plurality of side panels (16, 18, 20) provided along a periphery of the bottom panel (14) to surround the optical module (4). The lid has a top panel (38) mounted on the side panels (20) for covering the body (10), and extension panels (40) extending downward from the top panel (38). The side panels (16,18) and the extension panels (40) cooperates to form apertures (32a, 32b). Each of the body (10) and the lid (12) is formed by folding one sheet panel. Folding locations of the body (10) and the lid (12) have folding grooves (26, 44).

Abstract: An optical element combination structure in which an optical fiber and an optical waveguide are combined with each other and which can reduce fluctuation of coupling loss due to a change in environmental temperature is provided. The present invention relates to an optical element combination structure in which an optical fiber and an optical waveguide are combined with each other. An optical element combination structure according to the present invention 1 comprises an optical fiber 2 and a substrate 6 on which an optical waveguide 4 is formed. The substrate 6 has a V-shaped cross-sectional groove 8 formed so that the optical fiber and the optical waveguide are aligned with each other, and a recess 10 formed on a waveguide side relative to the groove 8. The optical fiber is secured to the V-shaped cross-sectional groove 8 with an adhesive 22.

Abstract: An optical element combination structure 1 according to the present invention comprises an optical fiber 2 extending in a direction of an optical axis 1a, an optical waveguide 4 being aligned with the fiber 2 in a direction of the optical axes 1a and having an end surface 18 facing an end surface 12 of the fiber, and a substrate 6 coupled with the fiber 2 and the waveguide 4. The end surface 12 of the fiber 2 is formed perpendicular to the optical axis 1a, and the end surface 18 of the waveguide 4 is inclined relative to a surface perpendicular to the optical axis 1a. A value of refractive index of a core 12 of the fiber 2 is different from that of refractive index of a core 14 of the waveguide 4. A gap 30 between the fiber end surface 12 and the waveguide end surface 14 is filled with a filler 32 having substantially the same value of refractive index as that of refractive index of the fiber core 8.

Abstract: A method for preparing an optical device by dicing includes applying a dicing tape onto the back face of a substrate provided thereon with a large number of optical elements on the surface thereof and dicing the substrate from the surface side of the substrate using a blade to thus prepare individual optical devices and the method is characterized in that the dicing operation is conducted in several stages using a blade which can ensure a moderate autogenously blade-generating effect. An optical device prepared by the method includes a substrate and an optical element formed on the surface of the substrate and it is characterized in that the maximum size of the ruptures present on the back face of the substrate in the direction vertical to the cut surface is not more than 0.1 mm.

Abstract: The present invention provides an optical device which has only a small number of ruptures on the edges of the surface and back face of the substrate as well as a method for the preparation of the same.