G - Physics – 02 – F
Patent
G - Physics
02
F
G02F 1/09 (2006.01)
Patent
CA 2255450
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, and includes an isolator including a Faraday rotator in which the rotation angle of polarization is different according to the intensity of an applied magnetic field, for controlling isolation of an optical signal according to the polarization rotation angle and outputting a modulated optical signal, a magnetic field generator for producing a magnetic field whose intensity is controlled by a predetermined electrical signal, 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 the optical isolator, the electric signal applied to the magnetic field generator isadjusted to control the intensity of the magnetic field formed in the isolator. Accordingly, isolation of an optical signal is activated or deactivated, therebymodulating a continuous wave optical signal. Therefore, a small and cheap optical modulator having an excellent temperature property can be realized and easily housed in the transmitter.
Ridout & Maybee Llp
Samsung Electronics Co. Ltd.
LandOfFree
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