Patent ID: 7068939

Claim:
An optical splitter connecting to an input optical fiber, a first output optical fiber and a second output optical fiber, comprising: a circulator comprising an input port connecting to the input fiber, a connecting port, and an output port connecting to the second output fiber; and a dynamic fiber bragg grating connecting with the connecting port of the circulator, a reflection ratio of the dynamic fiber bragg grating being controlled by an electrical current flowing in the dynamic fiber bragg grating; wherein a light beam input to the circulator through the input fiber transmits to the dynamic fiber bragg grating trough the connecting port of the circulator and dynamically splits into two beams, one beam being reflected by the dynamic fiber bragg grating and being output from the output port of the circulator, and the other beam passing through the dynamic fiber bragg grating and being output through the first output fiber, a power ratio of the two output beams being determined by the reflection ratio of the dynamic fiber bragg grating.