| 摘要 |
PURPOSE:To improve an S/N, by providing optical fiber separately to left rotating light and right rotating light. CONSTITUTION:As left rotating light and right rotating light transfer respectively different optical fibers 2-1, 2-1, even if there is return light at incident terminals T1, T2 by Rayleigh scattering, etc., the return light does not have effects on outputting light of output terminals T3, T4. Therefore, an S/N in output signal of a differential amplifier 5 is improved. |
