For the TE mode, the transmittance of the TE mode of the device exceeds -20dB within the 112nm bandwidth range of 1477nm~1589nnm wavelength, and the transmission spectrum of the TE mode changes extremely smoothly within this bandwidth.
The transmittance of TE mode in the 112nm bandwidth range of 1477nm~1589nnm wavelength exceeds -20dB, and the transmission spectrum of TE mode changes abnormally smoothly within this bandwidth.
For TE mode, the transmittance of TE mode exceeds -20dB in the bandwidth of 112nm with the wavelength of 1477nm~1589nnm, and the transmission spectrum of TE mode changes very smoothly in this bandwidth.