摘要:
An optical semiconductor device includes: semiconductor lasers separated into two groups; an optical coupler combining light output from the semiconductor lasers; an optical amplifier amplifying light output from the optical coupler; and waveguides respectively connecting the semiconductor lasers to the optical coupler. Each of the waveguides includes a respective bent waveguide. The bent waveguides have the same radius of curvature.
摘要:
A semiconductor laser comprises an active section for generating light, and a peripheral section as resonator for producing laser light from the generated light, and includes an InP substrate. The active section has a lower cladding layer formed of AlInAs or AlGaInAs, a core layer including an active layer formed of AlGaInAs or InGaAsP, and an upper cladding layer formed of AlInAs or AlGaInAs. The peripheral section has a first cladding layer formed by oxidizing AlInAs or AlGaInAs, a core layer, and a second clad layer formed by oxidizing AlInAs or AlGaInAs, and a two-dimensional photonic crystal defined by an array of regularly spaced apart holes the peripheral section.
摘要:
A semiconductor laser diode includes a mesa having a width on a semiconductor substrate and aligned with a direction of resonance, a current blocking layer formed by selective growth on both sides of the mesa and having a first embedded layer and a second embedded layer covering the first embedded layer.
摘要:
An optical modulator includes: a semiconductor chip; a waveguide in the semiconductor chip; a traveling wave electrode including an input portion and an output portion, to which a signal is applied for modulating light passing through the waveguide; a power supply line connected to the input portion via a first wire; and a termination resistor connected to the output portion via a second wire. Capacitance between the output portion and a grounding point is larger than capacitance between the input portion and the grounding point.
摘要:
An engine provided with a fuel injector for directly injecting fuel into a cylinder, a spark plug positioning a spark gap in a flight path of fuel injected from the fuel injector, and a cavity formed in a piston top face, wherein at the time of stratified combustion, the fuel injector injects substantially all of the fuel in a direction merging with a tumble flow, swirling in a longitudinal direction along the cavity at the compression stroke, along the swirl direction of the tumble flow and uses the spark plug to ignite the fuel while the fuel at the end period of injection is passing through the spark gap.
摘要:
A method of producing a phthalocyanine pigment nano-sized particle dispersion, containing: mixing a phthalocyanine compound solution of a phthalocyanine compound dissolved in an acid or a good solvent containing an acid, with an organic solvent that is a poor solvent with respect to the phthalocyanine compound, to prepare a mixed liquid in which a phthalocyanine compound crystal is formed, wherein a phthalocyanine compound crystal having one crystalline form selected from the group consisting of α, β, γ, ε, δ, π, ρ, A, B, X, Y, and R is added to the organic poor solvent or the mixed liquid, thereby producing the thus-formed phthalocyanine compound crystal having the same crystalline form as that of the added phthalocyanine compound crystal, and wherein an additive having a mass average molecular weight of 1,000 or more is incorporated therein.
摘要:
In a gain-coupled distributed feedback semiconductor laser, a coating of a low reflectivity is provided on a front facet from which laser light is emitted and a coating of a high reflectivity is provided on a rear facet, thus forming asymmetric coatings. The semiconductor laser has a structure in which an absorption diffraction grating is located along an optical waveguide, and the diffraction grating includes a phase shift region.
摘要:
There are provided a resin film being excellent in blocking resistance, scratch resistance, transparency, water resistance and chemical resistance and a member having the resin film as an outermost layer. The resin film comprises a vinylidene fluoride (VdF) copolymer and an acrylic polymer as essential components, in which a heat of fusion of crystal derived from the VdF copolymer in the resin film is from 15 to 30 J/g when measured with a differential scanning calorimeter (DSC), and light transmittance (light transmittance at 600 nm of 50 μm thick resin film) is not less than 85%. The member has the resin film as an outermost layer.
摘要翻译:提供了耐粘连性,耐擦伤性,透明性,耐水性和耐化学性优异的树脂膜和具有树脂膜作为最外层的部件。 树脂膜包括偏二氟乙烯(VdF)共聚物和作为必要成分的丙烯酸类聚合物,当用差示扫描测量时,树脂膜中衍生自VdF共聚物的结晶的熔化热为15〜30J / g 热量计(DSC)和光透射率(50μm厚的树脂膜的600nm的透光率)不小于85%。 该构件具有作为最外层的树脂膜。
摘要:
A vehicle door operating mechanism includes a ratchet interlocking lever, a handle interlocking lever, a motor power transmitting lever, and a force relaying member movable between a normal unlocking position, at which a force is transmittable from the handle interlocking lever and the motor power transmitting lever to the ratchet interlocking lever, and a locking position, at which the force is not transmittable from the handle interlocking lever and the motor power transmitting lever to the ratchet interlocking lever, wherein an emergency unlocking position, at which the force is transmittable from the handle interlocking lever to the ratchet interlocking lever and the force is not transmittable from the motor power transmitting lever to the ratchet interlocking lever, is set within a moving range of the force relaying member, and the motor power transmitting lever includes a guide portion for retaining the force relaying member at the emergency unlocking position.
摘要:
In a gain-coupled distributed feedback semiconductor laser, a coating of a low reflectivity is provided on a front facet from which laser light is emitted and a coating of a high reflectivity is provided on a rear facet, thus forming asymmetric coatings. The semiconductor laser has a structure in which an absorption diffraction grating is located along an optical waveguide, and the diffraction grating includes a phase shift region.