Abstract: A three-terminal multilayer ceramic capacitor includes at least one surface electrode layer on a surface of a second internal electrode layer connected to a lateral surface external electrode. The surface electrode layer includes at least one of Sn, In, Ga, Zn, Bi, Pb, Fe, V, Y or Cu, which is different from a main component of the second internal electrode layer.

Abstract: A capacitor component includes a laminate including dielectric layers and internal electrode layers, first and second external electrodes respectively provided on first and second end surfaces of the laminate, and a third external electrode provided on at least one of first and second lateral surfaces of the laminate. The internal electrode layers include a first internal electrode layer connected to the first external electrode and not connected to either the second or the third external electrode; a second internal electrode layer connected to the second external electrode and not connected to either the first or the third external electrode; a third internal electrode layer not connected to any of the first, the second, or the third external electrode; and a fourth internal electrode layer connected to the third external electrode and not connected to either the first or the second external electrode.

Abstract: A capacitor component includes a laminate including dielectric layers and internal electrode layers, first and second external electrodes respectively provided on first and second end surfaces of the laminate, and a third external electrode provided on at least one of first and second lateral surfaces of the laminate. The internal electrode layers include a first internal electrode layer connected to the first external electrode and not connected to either the second or the third external electrode; a second internal electrode layer connected to the second external electrode and not connected to either the first or the third external electrode; a third internal electrode layer not connected to any of the first, the second, or the third external electrode; and a fourth internal electrode layer connected to the third external electrode and not connected to either the first or the second external electrode.

Abstract: An optical transmitter includes: a semiconductor laser unit that outputs laser light of first output power and outputs a monitor current; a casing of an optical module that holds optical fiber; a monitor current detection unit that generates a monitor voltage; a laser driving unit that controls a laser driving current; a storage unit that stores information based on a result of a measurement of a ratio of second output power with respect to the first output power; a target voltage determination unit that changes the target voltage based on a detected temperature of a temperature sensor and the information based on the result of the measurement; and a power monitor value determination unit that generates a power monitor value indicating the second output power to be transmitted to a host device using the detected temperature and the information based on the result of the measurement.

Abstract: An optical transmitter includes: a semiconductor laser unit that outputs laser light of first output power and outputs a monitor current; a casing of an optical module that holds optical fiber; a monitor current detection unit that generates a monitor voltage; a laser driving unit that controls a laser driving current; a storage unit that stores information based on a result of a measurement of a ratio of second output power with respect to the first output power; a target voltage determination unit that changes the target voltage based on a detected temperature of a temperature sensor and the information based on the result of the measurement; and a power monitor value determination unit that generates a power monitor value indicating the second output power to be transmitted to a host device using the detected temperature and the information based on the result of the measurement.

Abstract: An optical transmitter includes a semiconductor laser, a thermoelement that is connected with the semiconductor laser and that heats or cools the semiconductor laser, a thermistor that detects the temperature of the semiconductor laser via the thermoelement, a laser drive circuit that drives the semiconductor laser, a thermoelement driving circuit that acquires information about the temperature of the semiconductor laser from the thermistor, and that controls a current flowing through the thermoelement in such a way that the temperature detected by the thermistor becomes equal to a set value, and a controller that varies the set value on the basis of monitor current information outputted from the semiconductor laser, the temperature information about the semiconductor laser which is notified from the thermistor, and laser driving current information notified from the laser drive circuit.

Abstract: An optical transmitter includes a semiconductor laser, a thermoelement that is connected with the semiconductor laser and that heats or cools the semiconductor laser, a thermistor that detects the temperature of the semiconductor laser via the thermoelement, a laser drive circuit that drives the semiconductor laser, a thermoelement driving circuit that acquires information about the temperature of the semiconductor laser from the thermistor, and that controls a current flowing through the thermoelement in such a way that the temperature detected by the thermistor becomes equal to a set value, and a controller that varies the set value on the basis of monitor current information outputted from the semiconductor laser, the temperature information about the semiconductor laser which is notified from the thermistor, and laser driving current information notified from the laser drive circuit.