| 摘要 |
An optical modulator using an isolator, and an optical transmitter including the same are provided. The optical modulator modulates a carrier wave generated by an optical source according to a predetermined electrical signal, a nd includes an isolator including a Faraday rotator in which the rotation angle of polarization is different according to the intensity of an applied magnetic fiel d, for controlling isolation of an optical signal according to the polarization rotatio n angle and outputting a modulated optical signal, a magnetic field generator for produc ing a magnetic field whose intensity is controlled by a predetermined electrical sig nal, and applying the produced magnetic field to the isolator, and a signal generator for supplying the electrical signal to the magnetic field generator and controlling the intensity of the electrical signal. The magnetic field generator is mounted on t he optical isolator, the electric signal applied to the magnetic field generator is adjusted to control the intensity of the magnetic field formed in the isolator. Accordingly, isolation of an optical signal is activated or deactivated, thereby modulating a continuous wave optical signal. Therefore, a small and cheap optica l modulator having an excellent temperature property can be realized and easily housed in the transmitter.
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