| 摘要 |
PROBLEM TO BE SOLVED: To generate a high-quality optical pulse string in which strength modulation is suppressed by reducing the power of a high frequency electric signal necessary for drive and reducing the threshold current of a laser by reducing optical loss. SOLUTION: An electric field absorption type optical modulator area of a semiconductor mode synchronizing laser is divided into two electroabsorption modulator areas 103, 104 arranged in a light advancing direction and optically connected in series. A high frequency electric signal oscillated by an oscillator 107 is distributed to a power distributer 106, and one distributed high frequency electric signal is applied to the electroabsorption modulator area 103. The other distributed high frequency electric signal is delayed only byπin a phase by a delay line 109, and then applied to the electroabsorption modulator area 103. COPYRIGHT: (C)2007,JPO&INPIT
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