Modeling of a reflection MQW modulator with multiple pass bands

We propose and investigate a modulator structure which acts as a conventional reflection modulator at one wavelength and allows several closely separated wavelengths to be transmitted unchanged. Modeling shows that this type of modulator can be designed with larger than 20 dB contrast ratio and lower than 2.5 dB insertion loss for the reflection wavelength, while having near unity transmission for the transmission wavelengths. The position of transmission peaks can be fully customized.