摘要:
Emitted light from a light source 1 is separated into two parts through an optical fiber coupler 2, one is entered in a measured optical module 3 as measurement light, and the other is given a group delay by means of an optical fiber delay line 5, a reflector 25, etc., as local light signal, then the local light signal is combined with reflected light signal from the measured optical module 3 through an optical fiber coupler 21 and the reflected light signal and the local light signal are caused to interfere with each other. A polarization controller 100 comprising a polarizer and a polarization rotation device for arbitrarily rotating the polarization state 0 degrees and 90 degrees at the time is used to generate beat signals at the polarization rotation angles, and the sum of the intensities of the beat signals is found, making it possible to measure the light power of the reflected light signal regardless of the polarization state of the local light signal or reflected light signal.
摘要:
A photocoupler 3 splits the light from a low-coherence light source 1 into measuring light DL and local oscillator light KL. A photocoupler 5 receives measuring light DL arid is input to an optical circuit 7 to be measured. The photocoupler 5 splits the reflected light RL. A polarization controller 9 controls the state of polarization of the reflected light RL as split by the photocoupler 5. A photocoupler 13 allows local oscillator light KL to be incident on a reflector mirror 16 and splits local oscillator light KL. A photocoupler 11 combines the reflected light RL as controlled in the state of polarization by the polarization controller 9, with the local oscillator light KL.
摘要:
A timer circuit includes a storage unit to store a series of first data content relating to a time into a specified address area, a target value generation unit to read the first data content from a read address of the storage unit and to generate, as a target value, third data content in which second data content is added to the first data content, a counter to perform counting and to output a count-up signal when the counting is performed up to the target value, and a control unit to sequentially designate a next read address of the storage unit at each count-up and to cause the series of operations of the target value generation unit and the counter to be executed.
摘要:
An image forming apparatus of the invention includes plural photoconductive bodies for forming a color image, an exposure unit to scan a laser light in a main scanning direction of each of the plural photoconductive bodies and to perform exposure, and a light amount correction unit to create, for each of the plural photoconductive bodies, light amount correction data for correcting a light amount of the laser light outputted form the exposure unit so that a light receiving sensitivity of each of the plural photoconductive bodies in the main scanning direction becomes uniform, and the light amount correction unit includes a first storage unit to store reference correction data, a second storage unit to store reference correction data, a second the reference correction data is made an absolute amount, by a relative amount correspondingly to each of the plural photoconductive bodies, and a combining unit to combine the reference correction data and the relative correction data to create the light amount correction data.
摘要:
The invention provides a fuel cell starting method and a fuel cell system capable of making an operation starting stable.The fuel cell starting method and the fuel cell system are provided with a reformer 10, a burner 20 and a fuel cell 30 and having step S4 of igniting the burner 20 with combustion fuel and combustion air being supplied thereto and steps S5 to S12 of leading at least a part of generation gas sent from the reformer 10 to the burner 20 while supplying combustion fuel and combustion air to the burner 20. The steps S5 to S12 include steps S8 to S12 for the case that the temperature of the burner before ignition is equal to or lower than 100° C. and steps S7, S9 to S12 of supplying the combustion fuel and the combustion air to make the air ratio smaller than that at the steps S8 to S12 in the case that the temperature of the burner 20 before ignition is higher than 100° C.
摘要:
An excitation phase pattern used to manage only the number of phases being excited in W1-2 phase excitation, and an excitation phase pattern used to manage only the number of phases being excited in 2W1-2-phase excitation are generated. The excitation phase patterns thus generated are monitored on the monitor.
摘要:
In a reforming device and a fuel cell system, the ignition and combustion at a burner section is stabilized regardless of the temperature of a reforming section by supplying the burner section with the combustible gas depending on the temperature of the reforming section at the time of a starting operation and after the generation of steam begins at an evaporator section. At the time of a starting operation and after steam generation detecting means detects the generation of steam, a control device of a reforming device executes control to switch the combustions of at least first combustible gas and second combustible gas at the burner section based on the state of the burner section and the temperature of the reforming section at the time of detecting the generation of steam as well as on the temperature of the reforming section after the time subsequent thereto.
摘要:
An excitation phase pattern used to manage only the number of phases being excited in W1-2 phase excitation, and an excitation phase pattern used to manage only the number of phases being excited in 2W1-2-phase excitation are generated. The excitation phase patterns thus generated are monitored on the monitor.
摘要:
A guided-wave circuit with a phase adjusting plate which adjusts optical path length errors, occurring during the manufacture of PLC, by an additional processing performed after the production of the PLC; and a method for producing the guided-wave circuit. A guided-wave circuit with an amplitude adjusting plate which adjusts the amplitude characteristics of light by an additional processing performed after the production of the PLC; and a method for producing the guided-wave circuit. A guided-wave circuit with a birefringence adjusting plate which adjusts the birefringence of light by an additional processing subsequent to the manufacture of the PLC; as well as a method for producing the guided-wave circuit. The guided-wave circuit includes a groove crossing a plurality of waveguides constituting the optical waveguides, a plate having optical characteristics spatially changed so as to adjust the optical characteristics at the intersections of the plate with the optical waveguides when the plate is inserted into the groove, and an adhesive for fixing the plate in the groove. The guided-wave circuit also includes both a phase adjusting plate and an amplitude adjusting plate to achieve further improvement in the optical characteristics. An apparatus for producing these optical characteristics adjusting plates is also included.
摘要:
According to this invention, a superluminescent diode includes a current injection portion having a current injection electrode formed adjacent to a first end face, a light-absorption portion contiguous with the current injection portion; and a waveguide continuously formed to extend from the current injection portion to the light-absorption portion. The waveguide is constituted by an active layer and a member which completely buries the active layer, has a bandgap larger than that of the active layer, and is formed of a material having a small refractive index. The waveguide of the current injection portion is linearly formed to be perpendicular to the first end face. The waveguide of the light-absorption portion has an end portion for guiding reflected light in a direction different from a propagation direction of light propagating through the waveguide.