Abstract: Provided is a beryllium copper alloy bonded body including a first member made of a beryllium copper alloy and a second member made of a beryllium copper alloy, wherein the first member and the second member are bonded to each other via the nickel layer having a thickness of 8 ?m or less.

Abstract: Provided is a beryllium copper alloy bonded body including a first member made of a beryllium copper alloy and a second member made of a beryllium copper alloy, wherein the first member and the second member are bonded to each other via the nickel layer having a thickness of 8 ?m or less.

Abstract: A stack structure includes plate-like electrochemical cells of ceramic, each having a pair of main surfaces and a side surface, and plate-like retainer pieces. The cell includes a first electrode in contact with first gas, a solid electrolyte, and a second electrode in contact with second gas. The first electrode has a gas flow channel formed therein and adapted to allow flow of the first gas. The cell has gas inflow and outflow ports. The retainer piece includes a body portion having a through-hole formed therein, and a pair of protrusions protruding from the body portion. The retainer piece has a communication hole formed therein and adapted to establish communication between the through-hole and a space formed between the protrusions. The cell is held by the paired protrusions, thereby establishing communication between the gas inflow or outflow port of the cell and the communication hole of the retainer piece.

Abstract: A stack structure includes plate-like electrochemical cells of ceramic, each having a pair of main surfaces and a side surface, and plate-like retainer pieces. The cell includes a first electrode in contact with first gas, a solid electrolyte, and a second electrode in contact with second gas. The first electrode has a gas flow channel formed therein and adapted to allow flow of the first gas. The cell has gas inflow and outflow ports. The retainer piece includes a body portion having a through-hole formed therein, and a pair of protrusions protruding from the body portion. The retainer piece has a communication hole formed therein and adapted to establish communication between the through-hole and a space formed between the protrusions. The cell is held by the paired protrusions, thereby establishing communication between the gas inflow or outflow port of the cell and the communication hole of the retainer piece.

Abstract: A planar type electrochemical device 10 has a first electrochemical cell 1A and a second electrochemical cell 1B integrated with each other. Each of the electrochemical cells has a first electrode 5 contacting a first gas, a solid electrolyte 4 and a second electrode 3 contacting a second gas. The first electrode 5 is exposed to the surface of the electrochemical device. A flow route 2a for the second gas is formed in the electrochemical device.

Abstract: A ceramic electrochemical cell 11 has a first electrode 12 contacting a first gas, a solid electrolyte film 13 and a second electrode 14 contacting a second gas. The electrochemical cell 11 is supported with a metal supporting member 1. A flow route 6 for a first gas is formed between the supporting member 1 and electrochemical cell 11. The supporting member 1 is supported with a metal manifold member. A gas supply hole and a gas discharge hole each communicated with the flow route 6 for the first gas is provided in the manifold member.

Abstract: An optical device includes an optical input waveguide, a branch/cross waveguide, an optical output waveguide and connection waveguides that connect the optical input and optical output waveguides to the cross/branch waveguide. The spot size of light propagating through the cross/branch waveguide is larger than the spot size of light propagating through optical input waveguides, the optical output waveguides, or the connection waveguides.

Abstract: An optical device consisting of a core layer, a first clad layer in contact with the core layer, a second clad layer, third clad layer and at least one electrode for applying a certain voltage or supplying a certain current. The second clad layer is deposited on the third clad layer and the core layer is provided between the first clad layer and the second clad layer. The core layer, first clad layer, second clad layer and third clad layer consist of a material with a negative refractive index variation coefficient, and the third clad layer has a refractive index smaller than that of the second clad layer.

Abstract: An optical device comprises a core layer; a first clad layer, with the core layer being deposited on a part of surface of the first clad layer; a second clad layer, with the core layer being provided between the first clad layer and the second clad layer; a third clad layer deposited on the second clad, an electrode for heating, and a substrate having a heat-sink function. At least one of the core layer and the clad layers comprises a material having a positive refractive index variation coefficient. The third clad layer has a refractive index smaller than that of the second clad layer.

Abstract: The spot size of light propagating through a cross waveguide 22 is larger than the spot size of light propagating through optical input waveguides 21a and 21b, optical output waveguides 23a and 23b, or connection waveguides 24a, 24b, 25a and 25b.

Abstract: An optical waveguide device comprises: a optical waveguide substrate 1 having a optical waveguide 6 provided on a main surface 1a ; ribbon shaped multiple optical fibers and single-core optical fibers 3a, 3 each connected to the optical waveguide substrate 1; and a metallic package 4 for sealing them with air tightness. In this, device, a lower end 5b of a support leg 5 for holding the optical waveguide substrate 1 at an upper end 5a is mounted on the inner surface of the package 4. The support leg 5 has an extension portion 5c that extends the upper end 5a in the longitudinal direction of the ribbon shaped multiple optical fibers fiber 3a relevant to the lower end 5b.

Abstract: An optical fiber array includes a V-groove substrate for housing an uncovered glass fiber section formed at an end portion of an optical fiber contained therein. A lower covered section housing portion houses a covered section of the optical fiber and is formed to be deeper than the V-groove forming portion. An optical fiber is disposed so that the uncovered glass fiber section is housed in the V groove and the covered section is housed in the lower covered section housing portion. A lid substrate is composed of a glass fiber protective portion covering an upper surface of the uncovered glass fiber section and an upper covered section housing portion houses a covered section of the optical fiber. The upper covered section housing portion is formed to be deeper than the glass fiber protective portion and is disposed on the V-groove substrate. A resin is filled in the gaps among the V-groove substrate, the optical fiber, and the lid substrate and cured to give a unitary optical fiber array.

Abstract: An assembly jig for assembling a phase-modulation-type optical fiber gyro has a reel support area for supporting a fiber coil reel with an elongate optical fiber wound therearound and a coupler reel with optical fibers from a coupler wound therearound, the fiber coil reel and the coupler reel being rotatably supported on a base plate of the assembly jig through a support shaft. The assembly jig also has a chip support base disposed on the base plate for temporarily supporting thereon the optical IC chip optically connected to the optical fibers, a package housing support base disposed on the base plate for supporting a package housing of a package to encase the optical IC chip therein and substantially packaging the optical IC chip with the package housing, and a lid support base disposed on the base plate for supporting a lid to cover the package housing. The assembly jig allows the optical fiber gyro to be assembly easily at a reduced cost.

Abstract: Disclosed is an optical fiber gyroscope comprising a fiber coil composed of a lengthy optical fiber wound therearound in a predetermined number of turns, a coupler for optically coupling an optical fiber led from a light source and an optical fiber led to a photodetector, and an optical IC chip arranged between the fiber coil and the coupler and provided with a phase modulator and a polarizer mounted on an optical waveguide, the optical fiber gyroscope further comprising a fiber coil reel around which the lengthy optical fiber for constructing the fiber coil is wound in the predetermined number of turns, a coupler reel around which the optical fibers led in both directions from the coupler are wound in a predetermined number of turns, and a housing member including a plurality of compartments (reel-placing region, frame, frame) for accommodating at least the both reels, the light source, and the optical IC chip.

Abstract: Disclosed is a fiber coil reel 100 associated with an optical fiber 10 wound therearound to make a predetermined number of turns to be used for an optical fiber gyroscope comprising a fiber coil composed of the lengthy optical fiber 10 to make the predetermined number of turns, a coupler 22 for optically coupling an optical fiber 16 led from a light source to an optical fiber 20 to be led to a photodetector, and an optical IC chip arranged between the fiber coil and the coupler 22 and including a phase modulator and a polarizer mounted on an optical waveguide, wherein a space for winding the lengthy optical fiber 10 around the outer circumference is provided, and a through-hole 102 is provided at the central portion, through which a support shaft 74 of an assembling jig 70 is rotatably inserted. Accordingly, the optical fiber gyroscope can be assembled with ease, and it is possible to effectively reduce the production cost of the optical fiber gyroscope.

Abstract: The optical waveguide substrate is provided with a branch-type optical waveguide. This optical waveguide is composed of a stem portion provided between one end face and the other end face of the optical waveguide substrate and a plurality of branch portions extending in parallel with the stem portion. The optical waveguide substrate is also provided with a reflecting means for reflecting light transmitted through the stem portion toward the branch portions. Preferably, the optical waveguide is provided with a dividing portion which is continued to both of the stem portion and the branch portions, and a turning portion for optically coupling the branch portion with the stem portion is provided in this dividing portion so that the light transmitted through the stem portion is reflected toward the branch portions at said turning portion. In an active-type optical waveguide device, light modulating electrodes for modulating the light propagating through the branch portions are provided along each branch portion.

Abstract: In a method of forming an assembly of an optical waveguide substrate and an optical fiber aligning substrate by adjoining an end face of a main body of the optical waveguide substrate and an end face of a main body of the optical fiber aligning substrate, a starting block formed by a flat rectangular plate is divided along a dividing surface which intersects perpendicularly to a side wall as well as a bottom wall of the starting block which are selected as a reference surface to obtain the main bodies of the optical waveguide substrate and optical fiber aligning substrate, optical waveguides are formed on the main body of the optical waveguide substrate by using the side wall and bottom wall as a positional reference, V-shaped guide grooves are formed in the main body of the optical fiber aligning substrate by using the side wall and bottom wall as a positional reference, and optical fibers are inserted into the guide grooves.