| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical wavelength conversion device, or an optical wavelength conversion method, with which stable control of high gradation is attainable without depending on a modulation signal pattern. SOLUTION: The optical wavelength conversion device includes a DBR laser 101, an optical wavelength conversion element 102, and a control means 103 to control a current injected into the DBR laser 101 according to a modulation signal per period to control its oscillation wavelength and optical output. The DBR laser 101 has at least two active regions 101b, 101c with mutually different gain peak wavelengths, and DBR regions 101d, 101e on which distributed Bragg reflectors (DBRs) are formed. The optical wavelength conversion element 102, on which fundamental harmonic light emitted from the DBR laser 101 is made incident, outputs the second harmonic light. The control means 103 is constructed in such a way that an oscillation state of the DBR laser 101 is controlled by injecting a driving current whose current value and injection time are adjusted so as to make the sum of the heat quantity produced within a period be kept constant per period to a plurality of active regions 101b, 101c respectively. COPYRIGHT: (C)2008,JPO&INPIT
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