7/2/2023 0 Comments Fibre optic gyroscope![]() The coupling ratios of the couplers in the active FRR are both 50%-50% tap. ![]() The EDFA compensates for the loss of the resonator and leads to a high finesse and a greater reduction in the RIN. An erbium-doped fiber amplifier (EDFA) is inserted in the passive resonator to construct an active fiber ring resonator (active FRR). For a great ARW improvement, the fiber ring resonator should have not only a great RIN reduction but also a large power transmission. ![]() A passive fiber ring resonator (passive FRR) reduces the RIN and improves the ARW, but the low power transmission results in a low signal-to-noise ratio at the detection. ![]() ![]() High precision fiber-optic gyroscopes (FOGs) interrogated with broadband light have angular random walk (ARW) limited by the source relative intensity noise (RIN). ![]()
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