Optical fiber gyroscope and navigation system employing the same.

摘要

In an optical fiber gyroscope, the sensitivity thereof is optimalized with a phase bias afforded by utilizing the phase characteristics of an optical branching/coupling unit (20). Further, the fluctuation of the intensity of a light source (10) and the error and secular change of the phase characteristics of the optical branching/coupling unit (20) are compensated by an electronic circuit. Moreover, an optical fiber loop (30) is received in a heat insulation casing (3, 4, 5) so as not to be affected by an ambient temperature change, thereby to prevent the drift of the optical fiber gyroscope attributed to the temperature change. Thus, the optical fiber gyroscope of high measurement accuracy is provided. <IMAGE>