time: 2020-05-08
Wavelength selector: the asymmetric Mach - mach-zehnder interferometer structure design of the N N wavelength selector in the first Y branch is divided into two beams of same phase The same light intensity, using asymmetric arm into the phase difference of PI, in the second Y combined beams may cause destructive interference, wavelength don't work through the electrode, compensating the phase difference, introduced the asymmetric arm, constructive interference occurs, wavelength by the wavelength of the required to be able to choose to the receiver With high extinction ratio and low power consumption advantages of fast speed。
