摘要:
The present invention relates to an optical fiber accommodated in an optical fiber cable, and more particularly, to an optical fiber which optimizes optical fiber coating resin and color resin and restrains an increase in transmission loss of the optical fiber due to an operating environment and aged deterioration and provides an optical fiber and optical fiber ribbon without any increase of transmission loss irrespective of the operating environment and aged deterioration, and especially when exposed to water or high humidity.The optical fiber is an optical fiber coated with at least two layers of coating resin, wherein the outermost coated coating resin is a colored layer made of color resin and when the optical fiber is immersed in water which is heated to 60° C. for 168 hours, an extraction rate of the coating resin of the optical fiber is set to 1.5 mass percent or below.
摘要:
A semiconductor apparatus that is effective for problems of local characteristic variations and that enables higher speed and lower power consumption. Semiconductor apparatus 100 has: a plurality of sensor circuits 101a to 101g which are arranged evenly inside semiconductor apparatus 100 and detect local characteristic variations at their respective positions as delay information; and output interface circuit 102 which collects delay information detected by a plurality of sensor circuits 101a to 101g and outputs the collected information to outside, and, in addition, externally, has: arithmetic operating section 110 which processes detected delay information statistically and generates a control code by judging conditions such as variations in the manufacturing process; output voltage controlling section 120 which determines the voltage to be outputted using a control code recorded in non-volatile memory 103; and power supply voltage generating section 130 which supplies power supply voltage 131a and ground potential 131b to semiconductor apparatus 100.
摘要:
A high-precision and high-performance level shift circuit, which is not adversely influenced by an offset error owned by an operational amplifier. Two sets of resistors (4o) and (4p) having the same resistance values, which are connected between differential output terminals and an operational amplifier (4r) for performing a level shift control are provided. A feedback operation is carried out in such a manner that an average voltage of each of differential outputs (4i) and (4m) is continuously made coincident with a DC reference potential (4q) irrespective of an offset error of an output-purpose operational amplifier, and a level shift function having a small error is realized. Two resistors (4h and 4l) are series-connected between a differential output of a digital/analog converter (4a) and a level shift circuit to output a voltage outside an output dynamic range of the digital/analog converter (4a).
摘要:
A method of growing compound semiconductor epitaxial layer by an atomic layer epitaxy, comprises the steps of blowing on a predetermined surface a compound source material gas constituted by atoms having an ion polarity different from atoms constituting the predetermined surface so that the compound source material is adsorped on the predetermined surface in a non-decomposed state, and decomposing the adsorped compound source material on the predetermined surface into atoms constituting crystals at the predetermined surface so as to grow an atomic layer of atoms having the same ion polarity as the compound source material gas. The ion polarity of the atomic layer prevents adsorption of the compound source material after the atomic layer is grown.
摘要:
The present invention provides an optical fiber in which composites constructing its coating are not complicated, so, there is also little constraint in view of production, and, moreover, delamination between a glass optical fiber and a primary layer, and a bubble in the primary layer hardly arise. The optical fiber of the present invention is an optical fiber which has a glass optical fiber which has a core 1, which passes an optical signal, in a center portion, and a cladding 2 surrounding this, a primary protective layer 3 made to coat the glass optical fiber, a secondary protective layer 4 applied on this primary protective layer 3, and a third protective layer 5 applied to an outer periphery of this secondary protective layer 4, wherein glass transition temperature of the primary protective layer 3 is made to be higher than −20° C. and 10° C. or lower, glass transition temperature of the secondary protective layer 4 is made to be −10° C. or less, and the glass transition temperature of the primary protective layer 3 is set higher than that of the secondary protective layer 4.
摘要:
A colored optical fiber whose transmission loss hardly increases even in a high humidity condition or water-immersed condition is provided. The colored optical fiber according to the present invention is a colored optical fiber having a colored coating layer on a circumference of an optical fiber having at least two coating layers on a circumference of a glass optical fiber, characterized in that a difference in each amount of thermal expansion in an outer diameter direction between the optical fiber and a coating layer obtained by removing the glass optical fiber from the optical fiber in a temperature range from −100° C. to 100° C. is 1.8 μm or less.
摘要:
In a cell library database, timing verification is conducted on an LSI which exists in a variable power supply system capable of changing the source voltage arbitrarily and which includes logic delay information associated with a plurality of source voltages. The database is configured, for example, so that the voltage information V of the source is represented in multiple bits V [1:0] and delay times Alh (Vlh) to Bhl (Vhh) between the time input signals A and B are each changed and the time the output signal Y changes are described for respective pieces of source voltage information LH (1.2 V), HL (1.5 V) and HH (1.8 V). This allows timing verification in the variable source system which operates with the source voltage changed dynamically.
摘要:
An optical fiber which reduces transmission loss increase even in a high humidity environment or under water is provided. To solve the above issue, an optical fiber according to the present invention comprises a glass optical fiber coated with at least two coating layers, soft and hard layers. The optical fiber is further coated by a colored resin to make a colored optical fiber. The hard layer and the color layer of the colored optical fiber have a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy.
摘要:
An optical fiber which reduces transmission loss increase even in a high humidity environment or under water is provided. To solve the above issue, an optical fiber according to the present invention comprises a glass optical fiber coated with at least two coating layers, soft and hard layers. The optical fiber is further coated by a colored resin to make a colored optical fiber. The hard layer and the color layer of the colored optical fiber have a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy.
摘要:
The present invention provides an optical fiber in which the transmission loss increase is suppressed even under a high-humidity condition or under a water-immersed condition. A colored optical fiber (22) according to an embodiment of the present invention is a colored optical fiber (22) formed by applying a colored layer to an optical fiber (14) including a glass optical fiber coated with at least a double-layered coating layer of a soft layer and a hard layer, and the ratio of thermal expansion coefficient between the coating layer after the colored layer of the colored optical fiber (22) is applied and the coating layer of the optical fiber (14) before the colored layer is applied is 0.87 or more. Furthermore, an optical fiber ribbon (32) according to another embodiment of the present invention is an optical fiber (32) formed by arranging a plurality of the colored optical fiber (22) in the form of a plane and coating them all together with a ribbon resin and the ratio of thermal expansion coefficient between the coating layer after the colored layer of the colored optical fiber (22) is applied and the coating layer of the optical fiber before the colored layer is applied is 0.90 or more.