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September 2007
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584 Reads
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436 Citations
Ultra-compact 5th order ring resonator optical filters based on submicron silicon photonic wires are demonstrated. Out-of-band rejection ratio of 40dB, 1dB flat-top pass band of 310GHz with ripples smaller than 0.4dB, and insertion loss of only (1.8±0.5)dB at the center of the pass band are realized simultaneously, all within a footprint of 0.0007mm² on a silicon chip.
... The 3-dB bandwidth of the resonant peak is ∼1.5 nm, as indicated in the zoom-in transmission spectra in Figure 2(d). It can be further expanded by cascading multiple microloop resonators to form a high-order filter, just like the flat-top filters based on cascaded microring resonators [35], [36]. When the temperature rises due to the microheater, the refractive index of silicon is changed, leading to the variation in the effective index of the edge state. ...
September 2007
