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Optical modulation element abnormality detection circuit, optical transmitter using the same, and optical modulation element abnormality detection method
Optical modulation element abnormality detection circuit, optical transmitter using the same, and optical modulation element abnormality detection method
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机译:光调制元件异常检测电路,使用该电路的光发送器以及光调制元件异常检测方法
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摘要
PROBLEM TO BE SOLVED: To enable determination of disconnection of a line L and to prevent light transmittance from being left increased and from resulting in failure of blocking light.SOLUTION: In one or more detection points P provided on a line L between a drive circuit 15 that drives an optical modulation element EAM and the optical modulation element EAM, drive current that drives the optical modulation element EAM passing through the line L is detected and whether the detected drive current is within or beyond a normal range is determined to determine disconnection of the line L.
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