| 摘要 |
PURPOSE:To accurately determine an oscillation wavelength to a desired value and to stably maintain it by altering the temperature of a junction in a semiconductor laser section rapidly by heat from a heat generating element at a high speed with low power consumption. CONSTITUTION:A heat generating terminal such as heat generating element parts H1 and H2 are associated integrally near a semiconductor laser section associated in a chip such as a semiconductor laser section LD. The temperature of a junction in the laser section LD can be varied by the heads from the parts H1 and H2 at a high speed with low power consumption. Thus, an oscillation wavelength is determined to a desired value and stably maintained, and arbitrarily varied in a wide range. |
