| 摘要 |
A wavelength-variable light source generates light having a wavelength according to an input wavelength control current. An EA modulator modulates light generated by the wavelength-variable light source, based on a modulation characteristic corresponding to an input EA bias. A TEC changes the temperature of the wavelength-variable light source and that of the EA modulator according to an input temperature control current. A control unit adjusts the setting-value of the wavelength control current input to the wavelength-variable light source, the setting-value of the EA bias input to the EA modulator, and the setting-value of the temperature of the EA modulator according to input wavelength data.
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