Abstract: An arrayed waveguide grating optical multiplexer/demultiplexer is provided to suppress a temperature depending characteristic of a center wavelength. The arrayed waveguide grating comprises at least one optical input waveguide, a first slab waveguide, an arrayed waveguide, a second slab waveguide, and a plurality of optical output waveguides. The first slab waveguide is separated on an cross separating plane which is intersected to a path of light passing through the first slab waveguide to constitute separated slab waveguides. A slide moving member is provided which may move at least one of these separated slab waveguides along the cross separating plane, depending upon the temperature. A front surface side of the waveguide forming region and a rear surface side of the substrate are sandwiched by a positional shift suppressing member such as a clip. The possition depressing the waveguide forming region by the clip is escaped from the optical axis of the separated slab waveguides.

Abstract: At least one of two slab waveguides constituting an arrayed waveguide grating is cut and separated together with a substrate on a cross separating face (8). A slide moving member (17) is arranged over a waveguide forming area formed on the substrate including the separating slab waveguide (3a) and a waveguide forming area formed on the substrate including the separating slab waveguide (3b). Temperature dependence of the center wavelength of the arrayed waveguide grating is reduced by slide-moving the separating slab waveguide (3a) by the slide moving member (17) along the cross separating face (8) dependently on temperature. The shift of an initial center wavelength is corrected by plastically deforming the slide moving member (17) so that the initial center wavelength is conformed to a grid wavelength.

Abstract: An arrayed waveguide grating including at least one first optical waveguide, a first slab waveguide, a plurality of arrayed waveguides, a second slab waveguide, and a plurality of second optical waveguides. The plurality of arrayed waveguides are connected to the at least one first optical waveguide via the first slab waveguide. Each of the plurality of arrayed waveguides has a different length. The plurality of second optical waveguides are connected to the plurality of arrayed waveguides via the second slab waveguide. At least one of the first and second slab waveguides is partitioned to first and second segments at a partition surface intersecting a path of light which travels through the arrayed waveguide grating. At least one of the first and second segments is configured to be slid along the partition surface to compensate an optical transmitting center wavelength of the light according to a temperature of the arrayed waveguide grating.

Abstract: While an arrangement is provided in which at least one stage of a Mach-Zehnder optical interferometer optical multiplexing/demultiplexing circuit (8) is connected, at least two optical output waveguides (6) are provided at a final stage. Each of the optical multiplexing/demultiplexing circuits contains a first optical waveguide (3); a second optical waveguide (4); and a plurality of directional coupling portions (1, 2) formed in such a manner that the first optical waveguide (3) is provided in proximity to the second optical waveguide (4). Optical transmission filters (7) are provided in the respective optical output waveguides (6) of the final stage, while the optical transmission filters (7) transmit therethrough light having setting wavelengths which are determined in correspondence with the respective optical output waveguide (6).

Abstract: The present invention is an optical waveguide module having e.g., a high impact resisting property and a high vibration resisting property. An optical waveguide circuit chip is supported by at least a peripheral portion of an edge portion and is stored into a storing portion of a package. The optical waveguide chip is formed by arranging an optical waveguide forming area on a substrate. An elastic member for impact relaxation of the optical waveguide circuit chip is arranged in at least one portion of the vicinity of the edge portion of the optical waveguide circuit chip. For example, the elastic member is arranged in the vicinity of each of four corners of the optical waveguide circuit chip.

Abstract: An arrayed waveguide grating comprise at least two half-wavelength plates 8a1 and 8a2 crossing the center in the length direction of the plurality of arrayed waveguides 4 disposed in series in the vertical direction of the arrayed waveguides 4. By these half-wavelength plates 8a1 and 8a2, a polarization mode conversion part to convert the TE mode and TM mode of signal beams to be transmitted through the arrayed waveguides 4 is formed. The arrayed waveguides 4 are divided into a group of arrayed waveguides 4 crossed by the half-wavelength plate 8a1 and a group of arrayed waveguides 4 crossed by the half-wavelength plate 8a2.

Abstract: The invention provides a small-sized optical wavelength multiplexed transmission module with suppressed noise, without increasing the size of the chip, wherein an optical filter (20) which interrupts light of a specified wavelength area other than the wavelength used for wavelength multiplexed transmissions is connected to an optical input waveguide side (11) of an arrayed waveguide type optical wavelength synthesizing and dividing device (10). Since the optical filter (20) can interrupt noise wavelength components, light passed through and divided by the arrayed waveguide optical wavelength synthesizing and dividing device (10) can become signal light of the use wavelength free from noise.

Abstract: A plate-shaped member (8a) whose linear expansion coefficient is larger than that of a substrate (1) is provided on the rear side of the substrate (1) of an arrayed waveguide diffraction grating (11) which divides, by a diffraction effect of an array waveguide (40), lights of a plurality of wavelengths from those having a plurality of wavelengths different from each other, which are inputted from an optical input waveguide (2), and outputs these lights from the respective optical output waveguides (6). A light transmission feature of the respective output lights includes a light transmission feature for causing lights to be transmitted, centering around the center wavelengths of light transmission, which are different from each other, wherein the center wavelengths of light transmission shifts to the long wavelength side by a temperature rise.

Abstract: The invention relates to a small-sized multiple-core optical connector having high reliability, which can be easily assembled and manufactured. A plurality of array guide grooves (22) are arrayed and formed on a flat substrate (21). The array pitch interval of the array guide grooves is roughly coincident with the outer diameter of bare optical fibers (4a), (4b). The first optical fiber tape (6a) and the second optical fiber tape (6b) are disposed at the rear end side of the flat substrate (21) so as to overlap each other, wherein the first bare optical fibers (4a) of the first optical fiber tape (6a) and the second bare optical fibers (4b) of the second optical fiber tape (6b) are alternately array-converted and accommodated in the array guide grooves (22). The bare optical fibers (4a), (4b) are pressed from the upside of the bare optical fibers (4a),(4b) at the tip end side of the array, and they are placed and fixed in the array guide grooves.