摘要:
Provided is a single-mode optical fiber that propagates an optical signal at a wavelength of 1310 nm, in single-mode operation; has a mode field diameter of 6.6 μm or more at the wavelength of 1310 nm; and a macro bending loss of at most 0.1 dB/10 turns with a bending radius of 7.5 mm at a wavelength of 1650 nm.
摘要:
The present invention provides an optical fiber having dispersion of −8 ps/nm/km or less at a wavelength of 1460 nm including a reference layer which is a reference of a refractive index profile and at least three glass layers that exist inside the reference layer, characterized in that when it is assumed that the maximum relative refractive index difference of the first glass layer formed innermost of the at least three glass layers with respect to the reference layer is Δ1, the relative refractive index difference of the second glass layer formed second from the inside with respect to the reference layer is Δ2, the relative refractive index difference of the third glass layer formed third from the inside with respect to the reference layer is Δ3 and the relative refractive index difference of the reference layer with respect to pure quartz glass is ΔC, Δ1>Δ3>Δ2, Δ1≧1.0% and ΔC
摘要:
Methods are disclosed for fabricating any of various semiconductor devices that include a reinforcing substrate bonded to a device substrate, wherein stresses between the two substrates are reduced compared to conventional devices. In the context of a back-surface-incidence (BSI) CCD light sensor, one or more pixels of a light-sensing array are formed on the surface of a “CCD” or “device” substrate. A layer of a curable resin adhesive is applied to the upper surface of the device substrate. A reinforcing substrate (e.g., glass) is placed on the layer of uncured adhesive, and the adhesive is cured. After curing the resin adhesive has a hardness of no greater than 40 (as measured by the JIS-A standard). With such an adhesive, when the resin adhesive cures, no stress is applied to the device substrate even a difference exists in the thermal expansion coefficients of the cured adhesive and the device substrate.
摘要:
There is provided an optical fiber for flattening a dispersion slope in a transmission wavelength band and suitable for high bit-rate and high capacity WDM transmission in a wide range. In this optical fiber, conditions of 0.8%≦&Dgr;1≦3.0%, −0.7%≦&Dgr;2≦−0.4%, and 0.2%≦&Dgr;3≦0.5% are satisfied when a relative refractive index difference of the first core with respect to the clad is set to &Dgr;1, a relative refractive index difference of the second core with respect to the clad is set to &Dgr;2, and a relative refractive index difference of the third core with respect to the clad is set to &Dgr;3. A cable cutoff wavelength lies on a short wavelength side from 1520 nm. Further, relations of S
摘要:
Optical polishing methods and apparatus are disclosed for polishing and planarizing surfaces of a wafer or other workpiece. A polishing apparatus according to the present invention preferably comprises a dispenser for dispensing polishing agent between a polishing body and the surface of the object to be polished. The polishing apparatus moves the polishing body and the object being polished against one another. The polishing body preferably comprises a light-permeable substance. A film-thickness measuring device for measuring the thickness of a film on the object being polished is preferably positioned on the side of the polishing body opposite of the surface of the object being polished. The film-thickness measuring device preferably measures the film thickness by using a light source to irradiate the object being polished through the polishing body. The film-thickness measuring device then uses light reflected from the film of the object being polished to determine the film's thickness.
摘要:
An apparatus for forming a porous preform that is useable to an optical fiber by extruding a plastifiable material having silica powder as a main component thereof. The apparatus includes an extruding main body having a cylinder and a screw for extruding the plastifiable material from the cylinder and a material passage member connected to the cylinder so as to communicate therewith. The material passage member has a projection member which projects into the material passage member for preventing a lamination of the plastifiable material. The apparatus also includes a molding head connected to the material passage member so as to communicate therewith.
摘要:
A subsignal transmitting system had working lines for respectively transmitting multiplexed signals each including a main signal, and had at least one protection line for transmitting one of the multiplexed signals when it is detected that the transmitting conditions of one of the working lines along which the signals are being transmitted are deteriorated. To realize the switching of the subsignal transmitting through the protection line, the system comprises a switching signal transmission line for transmitting, in the direction opposite to the transmission of the multiplexed signals, a switching signal indicating which one of the working lines is too deteriorated for transmission of the corresponding multiplexed signal, a transmitting side subsignal switching unit for outputting one of the input subsignals to one of the working lines respectively and for outputting, in response to the switching signal, one of the input subsignals to the protection line; and a receiving side subsignal switching unit, operatively connected to the subsignal output terminals, for outputting the subsignal through the protection line to, in response to the switching signal, the corresponding one of the subsignal output terminals, the remaining subsignals through the working lines being output to the remaining output terminals, respectively.
摘要:
A method of producing a glass preform by depositing silica powder that contains silica particles on a starting material includes a transferring step, a disaggregating step, and a depositing step. The transferring step includes transferring the silica powder. The disaggregating step includes disaggregating and dispersing agglomerates of the silica particles contained in the silica powder while being transferred in the transferring step. The depositing step includes depositing the silica powder, which is transferred and is obtained by disaggregating and dispersing the agglomerates of the silica particles, on the starting material.
摘要:
A holey fiber with significantly large effective core area is provided.The holey fiber comprises a core portion and a cladding portion at the circumference of the core portion. The cladding portion has plurality of holes distributed to shape triangular lattices around the core portion; wherein d/Λ is less than or equal to 0.42, the diameter of the holey fiber is larger than or equal to 580 μm, an effective core area is larger than or equal to 15000 μm2 at 1064 nm and a confinement loss is less than or equal to 0.1 dB/m at 1064 nm; where d is the hole diameter in μm and Λ is a lattice constant of the triangular lattice in μm.
摘要翻译:提供了一种具有明显大的有效核心区域的多孔光纤。 多孔纤维包括在芯部的圆周处的芯部分和包层部分。 包层部分具有分布形成围绕芯部的三角形格子的多个孔; 其中d /Λ小于或等于0.42,多孔纤维的直径大于或等于580μm,有效核心面积在1064nm处大于或等于15000μm2,限制损耗小于或等于 在1064nm处等于0.1dB / m; 其中d是以μm表示的孔直径,Λ是三角形晶格的晶格常数,单位为μm。
摘要:
An optical fiber ribbon includes a plurality of optical fibers, each includes a glass optical fiber coated with a fiber coating, that are arranged in parallel, and a ribbon coating that coats the optical fibers arranged in parallel. The optical fiber ribbon has a thickness equal to 300 μm or less. The fiber coating is made of a non-flame-resistant ultraviolet curable resin. The ribbon coating has a thickness equal to 40 μm or more and is made of a flame resistant resin.