| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical frequency control device capable of preventing the enlargement of a size even when the number of output beams increases. <P>SOLUTION: A beat signal is divided for each frequency corresponding to each branch signal optical path by a frequency branch splitter 12 in a phase error detection part 10. The beat signal with frequency of f0, the beat signals with the other frequency are mixed by a mixer 13 to generate the beat signal corresponding to a difference between frequencies of both beat signals. In the phase error detection part 10, a master signal from a master signal source 14 is defined to be a master signal with different frequency by a divider 15. The divided master signal and the beat signal corresponding to the frequency of the master signal are mixed by a mixer 16 to generate a phase error signal 23 corresponding to a difference between frequencies of the master signal and the beat signal. A phase control part 11 controls an optical frequency modulator 4 such that the optical frequency modulator 4 compensates a phase error based on the phase error signal 23. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
