摘要:
It is provided that a machining conditions setting system and a machining conditions setting method with which it is possible to select a machining condition for machining according to a target degree of hardness and obtain a predetermined degree of hardness by performing only the machining. The machining conditions setting system includes: a machining conditions database that, by determining in advance a relationship between the machining condition and a degree of hardness of the workpiece machined under the machining condition, stores the machining condition corresponding to the material of the workpiece and a range of degree of hardness for machining; and machining conditions selection means into which a material of a workpiece and a target degree of hardness are input, and which outputs a machining condition under which machining with the target degree of hardness can be performed, referring to the machining conditions database.
摘要:
A compensation scheme for an optical amplifier that reduces differences in gain observed at various wavelengths combines and controls characteristics of an automatic gain control circuit and variable gain equalizers. The peak gain wavelength typically observed in optical amplifiers is reduced by shifting the variable gain equalizer characteristic, which has a wavelength region of maximum gain loss. By combining the characteristics of the peak wavelength gain with the maximum wavelength loss according to the various elements, a smooth gain curve can be realized. A variable gain equalizer control circuit provides the required control, and can control multiple variable gain equalizers positioned in various numbers and locations with regard to an optical amplifier section.
摘要:
Optical surge preventing systems and methods for rare earth-doped optical fiber amplifiers are disclosed. The systems are so arranged as to cause any signal existing in a doped fiber section so as not to over excite the rare earth elements in the doped fiber section. In one embodiment, a background signal light with such a wavelength as to cause induced emission in the doped fiber section is always coupled into the doped fiber section regardless of whether a message signal light exists or not. The background signal light may be generated by any suitable light source or a light spontaneously emitted from either end of the doped fiber section. In another embodiment, a dummy signal light is coupled into the doped fiber section if the level of the message signal light becomes less than a predetermined value. Coupling of the background signal light or the dummy signal light into the doped fiber section may be done from either of the message signal input and output sides.
摘要:
A light amplifier is provided which is capable of maintaining the output light of excitation light sources at a constant level even when the light power input into the rare earth containing optical fiber fluctuates due to the tracking error of the excitation light source or due to the temperature characteristic or the polarization dependence of the excitation light multiplexer. The light passed through the rare earth containing optical fiber is extracted after being split by the splitting device 3, and output levels of the excitation light sources and are controlled by a control circuit in response to the levels of the extracted light. Consequently, the light output can be maintained at a constant level even when the excitation light power input into the optical fiber fluctuates due to the polarization dependence or the temperature characteristic of the light multiplexer for supplying the excitation light into the optical fiber.
摘要:
In an optical amplifying for amplifying an input wavelength multiplexed signal into an amplified output wavelength multiplexed signal, each of the input wavelength multiplexed signal and the amplified output wavelength multiplexed signal containing a plurality of optical component signals which have wavelengths different from one another, and each of which has an amplitude level, the optical amplifying apparatus comprises an optical amplifier for amplifying the input optical wavelength multiplexed signal into the amplified output wavelength multiplexed signal and an optical detecting circuit for individually detecting the amplitude level of at least one of the optical component signals.
摘要:
Provided is a method for maintaining cutting quality in which a work surface can be reliably maintained at a predetermined hardness or less regardless of a disturbance during cutting. The method includes a data-acquiring step of acquiring, as a target cutting resistance, the cutting resistance of a machining tool (7) during cutting performed such that the hardness of a surface layer is lower than a predetermined hardness by adjusting machining conditions; and a cutting step of performing cutting while detecting the cutting resistance of the machining tool (7) during cutting and performing control such that the detected cutting resistance is lower than the target cutting resistance.
摘要:
In a 32-channel wavelength division multiplexing optical transmission system, for example, four optical transmitters are grouped in eight groups. Each group is provided with a control optical transmitter. The control light transmitter regulates the level of a control light so that the total level of light transmitted from the corresponding group is equal to the total level of four signal lights. An optical transmission line of the above-mentioned system is normally regulated beforehand so that the wavelength characteristic of the following signal lights is flat when light at the total level of thirty-two signal lights in a predetermined range of wavelengths is transmitted. Therefore, in the system according to the invention, independent of the number of signal lights, the receive level of a signal light is unchangeable.
摘要:
In a laser beam machine head, when a filler wire and an optical axis of a laser beam are arranged coaxially, a convex roof mirror and a concave roof mirror are combined to divide the laser beam into two separate laser beams to that no laser beam is projected onto a filler wire feed pipe. Furthermore, the filler wire is fed from outside the laser beams to a condensing position via a filler wire guide in the spacing between the separate laser beams, or an electrode supported by a water flow pipe or an electrode holding pipe is brought close to the condensing position.
摘要:
In a data communication system, a circuit for regenerating an optical signal that is deteriorated during the course of transmission has an optical clock generator for generating an optical clock signal whose frequency is equal to the bit rate of an optical signal input to a preselected port thereof. The clock generator outputs the clock signal via the same port as the optical signal is input. The circuit is capable of regenerating the optical signal while efficiently separating the optical signal and clock signal respectively input to and output from the clock generator.
摘要:
A machining method for austenite stainless steel equipment and piping, and nuclear power plant equipment and piping machined by use of this method are provided to suppress occurrence of a hardened layer due to machining, and capable of suppressing occurrence of SCC without performing an after treatment and reducing working hours and cost. The machining method for austenite stainless steel equipment and piping according to the first aspect of the present invention includes a finishing treatment process for performing a machining operation by use of a throw-away tip (5) whose rake angle is +29° or more to suppress work hardening of a surface.