PURPOSE: To obtain lights of a plurality of wavelengths by independently controlling temperatures of a plurality of semconductor light emitting elements on the same substrate.
CONSTITUTION: The light emitting part A consists of array form semiconductor elements on the substrate 15, and individual lasers have a hetero structure. The heating part B independently provided to each laser consists of an insulation member 7, a heat generating member 8, an electrode 9, and a protection film 10. The temperature adjusting part C is composed of a supporting member 11, a temperature sensitive element 12 detecting the temperature of the member 11, a thermoelectric element 13 heating and cooling the member 11 based on the information of the element 12, and a heat dissipating fin 14 diffusing the heat from the element 13 to the atmosphere. The oscillation wavelength of the semiconductor laser can be independently controlled by changing the current impressed on respective heat generating member 8.
NOJIRI HIDEAKI
MIYAZAWA SEIICHI
HAZEMOTO YOSHIKI
Next Patent: PHOTO ISOLATOR-LASER DIODE COUPLER