摘要:
A GaAs based semiconductor laser has a combination of cladding layers including a ridge structure part, and a remaining part which overlays the active layers of the laser, and an etch stop layer sandwiched between the ridge structure part and the remaining part. The remaining part preferably overlies the entire surface of laser active layers and has a thickness “D” which satisfies 1.1×W>D≧0.5×W wherein W is the width of a spot size having a strength of {fraction (1/e2)} as measured at the laser front facet in a direction perpendicular to the active layers, wherein “e” is the base of the natural logarithm. The semiconductor laser solves the kink phenomenon to obtain an excellent linear relationship between the optical output power and the injected current.
摘要:
A wavelength conversion module according to the present invention includes an external resonator, a semiconductor laser module and a wavelength conversion device for converting a wavelength of light output from the semiconductor laser module into a shorter wavelength. This wavelength conversion device includes at least one of a nonlinear crystal for generating SFG (Sum-frequency Generation) light and a nonlinear crystal for generating SHG (Second Harmonic Generation) light. Each of the SFG generating element and the SHG generating element of the wavelength conversion device may have a periodically-poled ridge-waveguide structure or a periodically-poled proton-exchanged-waveguide structure.
摘要:
A GaAs based semiconductor laser having a combination of cladding layers including a ridge structure part, and a remaining part which overlays the active layers of the laser, and an etch stop layer sandwiched between the ridge structure part and the remaining part. The remaining part preferably overlies the entire surface of laser active layers and has a thickness “D” which satisfies 1.1×W>D≧0.5×W wherein W is the width of a spot size having a strength of 1/e2 as measured at the laser front facet in a direction perpendicular to the active layers, wherein “e” is the base of the natural logarithm. The semiconductor laser solves the kink phenomenon to obtain an excellent linear relationship between the optical output power and the injected current.
摘要:
A wavelength conversion module according to the present invention includes an external resonator, a semiconductor laser module and a wavelength conversion device for converting a wavelength of light output from the semiconductor laser module into a shorter wavelength. This wavelength conversion device includes at least one of a nonlinear crystal for generating SFG (Sum-frequency Generation) light and a nonlinear crystal for generating SHG (Second Harmonic Generation) light. Each of the SFG generating element and the SHG generating element of the wavelength conversion device may have a periodically-poled ridge-waveguide structure or a periodically-poled proton-exchanged-waveguide structure.
摘要:
The semiconductor laser element comprises, from bottom to top, the p-AlxGa1−xAs upper clad layer, p-AlyGa1−yAs resistance control layer, and p-GaAs cap layer (where x>y>0.2). A portion of only the resistance control layer and cap layer is selectively etched. The etchant used for this etching is a mixture of organic acid and hydrogen peroxide based mixture, has such a composition such that the ratio of dissolution rate of the upper clad layer to the cap layer is between 10 and 20, and pH is between 7.4 and 7.6.
摘要翻译:半导体激光元件从底部到顶部包括p-Al x Ga 1-x As上覆层,p-AllyGa1-yAs电阻控制层和p-GaAs覆盖层(其中x> y> 0.2)。 选择性地蚀刻仅电阻控制层和盖层的一部分。 用于该蚀刻的蚀刻剂是有机酸和基于过氧化氢的混合物的混合物,具有这样的组成,使得上覆层与盖层的溶解速率之比在10和20之间,并且pH在7.4和 7.6。
摘要:
A semiconductor laser device emitting a laser beam having stable emitting wavelength and a multimode spectrum is provided. The semiconductor laser device is a Fabry-Perot type semiconductor laser device having a layer structure including an active layer of a quantum well structure, and emitting a laser beam having wavelength stabilized by an action of return light and having a multimode spectrum, wherein each well layer satisfies relation: Γ/d≦1.3×10−3 nm−1 where Γ and d(nm) are an optical confinement factor and a thickness of a well layer, respectively.
摘要:
The semiconductor laser element comprises, from bottom to top, the p-AlxGa1-xAs upper clad layer, p-AlyGa1-yAs resistance control layer, and p-GaAs cap layer (where x>y>0.2). A portion of only the resistance control layer and cap layer is selectively etched. The etchant used for this etching is a mixture of organic acid and hydrogen peroxide based mixture, has such a composition such that the ratio of dissolution rate of the upper clad layer to the cap layer is between 10 and 20, and pH is between 7.4 and 7.6.
摘要翻译:半导体激光元件从底部到顶部包括p-Al x Ga 1-x As上覆层,p-AllyGa1-yAs电阻控制层和p-GaAs覆盖层(其中x> y> 0.2)。 选择性地蚀刻仅电阻控制层和盖层的一部分。 用于该蚀刻的蚀刻剂是有机酸和基于过氧化氢的混合物的混合物,具有这样的组成,使得上覆层与盖层的溶解速率之比在10和20之间,并且pH在7.4和 7.6。
摘要:
In a semiconductor laser device comprising a semiconductor laser main body having an active layer formed between a pair of cladding layers, and a non-absorbing layer of InGaP formed on the facets of the semiconductor laser main body and having a band gap greater than the band gap of the active layer,a diffusion blocking layer of, for example, Si, SiN or Ge is formed on the surface of the non-absorbing layer, and a di-electric protective layer of, for example, AlO.sub.x, SiO.sub.x, SiN.sub.x or MgO.sub.x for regulating reflectance at the facets and protecting the non-absorbing layer is formed on the diffusion blocking layer.
摘要:
A snow vehicle of the saddle-riding type utilizes essentially the same upper structure as a motorcycle but mounts a ski on the front fork for steering and an engine-driven endless belt track assembly for powering the device. The endless belt track assembly is arranged for mounting on a rear arm structure in order to maintain surface contact between the endless belt and the snow and thereby improve the operating efficiency of the vehicle. The arm may be pivotally mounted or integral with a rear fork pivotally mounted to the vehicle. An improved endless belt construction is described in which the belt is strengthened by core members and the driving cogs of particular configuration and disposed at prescribed locations with respect to the propelling lugs in order to maintain surface contact between the belt edge and the snow surface during cornering. Also disclosed are various forms of cover structures for the track assembly that prevent the scattering of snow from the belt onto the rider or vehicle parts. Grab rails attached to the rear swing arm elements facilitate manipulation of the vehicle in confined spaces. A stopper belt adjustment is also shown mounted to a rear fork with the stopper belt extruding to an articulated rear swing arm structure. The adjustment accommodates for adjustments to the drive chain for tensioning.
摘要:
A fluorescent labeling reagent of the present invention includes an inorganic fluorescent particle and a material (A) having a material (B) of biological origin adsorbed or bound thereto. The inorganic fluorescent particle is integrated with the material (A) so as to form the reagent of the present invention. The inorganic fluorescent particle used in the present invention is capable of emitting light with a wavelength of 650 nm to 1600 nm in the infrared region or the near-infrared region which can be detected by means of Si-CCD or InGaAs-PD and can penetrate an H2O rich sample when excited by light with a wavelength of 650 nm or longer which has the shortest transparent wavelength of AlInGaP-LD including oxygen adsorption type hemoglobin used for DVDs etc.
摘要翻译:本发明的荧光标记试剂包括无机荧光颗粒和具有吸附或结合生物学原料的材料(B)的材料(A)。 将无机荧光颗粒与材料(A)整合以形成本发明的试剂。 本发明中使用的无机荧光粒子能够通过Si-CCD或InGaAs-PD检测的红外区域或近红外区域发射波长为650nm〜1600nm的光,并能够穿透 当具有波长为650nm或更长的光,其具有包括用于DVD等的氧吸附型血红蛋白的AlInGaP-LD的最短透明波长激发时,富含H 2 O 2的样品。