Apparatus for converting optical bipolar signals to optical...

Details Apparatus for converting optical bipolar signals to optical... Apparatus for converting optical bipolar signals to optical...

H - Electricity

04

B

H04B 10/12 (2006.01) G02F 2/00 (2006.01) G06C 3/00 (2006.01) H03K 5/01 (2006.01) H03K 19/0175 (2006.01)

Patent

CA 2145913

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. (FIG. 1)

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