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Apparatus for Converting Optical Bipolar Signals to Optical Unipolar Signals
Apparatus for Converting Optical Bipolar Signals to Optical Unipolar Signals
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机译:用于将双极光信号转换成单极光信号的设备
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摘要
An apparatus for converting a bipolar optical signal to a unipolar optical signal includes first and second photodetectors electrically coupled in series for receiving the bipolar optical signal. An electro-absorption modulator such as a self-linearized modulator, for example, is electrically coupled to the photodetectors. The modulator serves to transmit therethrough a portion of the power of an optical beam in an amount proportional to the power of the bipolar optical signal to form a transmitted beam. A constant current source is provided for supplying a current that shifts the power of the optical beam transmitted through the modulator by a predetermined amount, thus forming the desired unipolar optical signal. MATH
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