Fig. 1. Ring resonator based on 2×2 fiber coupler

Fig. 2. Transmission and delay curves of ring resonator

Fig. 3. High performance MPF

Fig. 4. Transmission measurement device of fiber ring resonator

Fig. 5. Measurement results of fiber ring resonator. (a) Transmittance at frequency span of 40 GHz; (b) normalized transmittance at central frequency of 10 GHz, frequency span of 300 MHz; (c) normalized transmittance and delay at central frequency of 10 GHz, frequency span of 10 MHz, 3 dB bandwidth about 1.2 MHz

Fig. 6. High performance MPF transmittance measurement device

Fig. 7. Measurement results of high performance MPFs. (a) Using cascaded resonator, grating, and WS; (b) using cascaded grating and WS