Reduction of the Relative Intensity Noise of Broadband Sources using Dual Fiber Ring Resonator

Interferometric fiber-optic gyroscopes (IFOGs) are widely utilized due to their compact size and solid-state design. However, sensitivity of detecting rotation is limited by the relative intensity noise (RIN) associated with broadband source. To overcome this limitation, a conventional fiber ring resonator (FRR) can be employed filter RIN specifically at IFOG frequency. Nonetheless, implementing solution necessitates delay line length equal that coil. address challenge, we propose utilization passive active dual FRRs examine suppression characteristics. By utilizing FRR as an optimized gain point filter, achieve theoretical ratio equivalent traditional FRR, while significantly reducing required line.