| 摘要 |
PROBLEM TO BE SOLVED: To increase electrostatic breakdown voltage with a simple constitution. SOLUTION: A resistor R (or a coil) is connected in series a semiconductor laser device (LD chip 11) and a first capacitor C1 and a second capacitor C2 are respectively connected in parallel with the semiconductor laser device on both sides of the resistor R (or the coil) for arranging the capacitor C1 and C2 and the resistor R (or the coil) in the shape ofπ. In this way, a high electrostatic breakdown voltage can be obtained.
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