We study on the joint training mode of optical engineering (OE) master in the ways of teaching, scientific research and practice cooperation. Our goal is to enhance the abilities and research level of OE graduate students by establishing the joint training cooperation with the domestic or foreign high level universities, the top research institutes and the famous enterprises, and to let more and more graduate students enter the high level universities and companies. In addition, we want to create the training quality evaluation index and evaluation system of the OE master students to evaluate this joint training mode.
Guided-mode resonance filter (GMRF) with variable bandwidth using coupling gratings near the Brewster angle is presented. For the contact coupling gratings, the bandwidth of the GMRF can be significantly altered with the resonance location kept almost the same as the transverse shift is varied. The resonance location blue-shifts with the increase of the air gap thickness in both cases of S=0 and S=0.5. The filter bandwidth is increased exponentially with the increase of the air gap thickness at the aligned condition due to the decreased mode confinement. In the case of the maximum misaligned condition, the filter bandwidth is reduced exponentially with the increase of the air gap thickness due to the decreased mode coupling between the two misaligned gratings. The spectral response of the coupling gratings coincides with each other for both the aligned condition and the maximum misaligned condition when the thickness of the air gap is large enough. The resonance location almost does not move as it approaches the cutoff wavelength of the substrate. The sideband level is kept low as the transverse and horizontal shifts are varied due to the Brewster antireflection (AR) effect.
Resonant properties of the encapsulated grating in fused silica are studied based on the GMR effect. The planar waveguide model is used to demonstrate the resonant properties of the TE<sub>1,0</sub>, TE<sub>1,1</sub>, and TE<sub>1,2 </sub>resonances, such as the resonance locations, the confinement factor and the effective waveguide thickness. It is shown that the resonant modes of the TE<sub>1,0</sub>, TE<sub>1,1</sub>, and TE<sub>1,2</sub> resonances are confined in a wavelength band, and the resonance locations can be tuned within this band. The mode confinement of the top layer for the TE<sub>1,0</sub>, TE<sub>1,1</sub>, and TE<sub>1,2</sub> resonances is increased as the thickness of the top layer increases. By properly selecting the thickness of the grating layer, multiline GMR filter with different peak reflectivity can be obtained.