Abstract: Provided is a multi-channel drop filter using a photonic crystal, wherein light having a desired wavelength among light of various wavelengths guided along a bus wavelength is filtered to the drop waveguide arranged perpendicular to the bus waveguide through a resonator arranged between the bus and drop waveguides, thereby being easily connected to the existing planar photonic crystal devices to enable fabrication by nanoimprint technology using an embossing process as well as implementing an optical filter having an ultra narrowband line width and a high integrated photonic integrated circuit.

Abstract: Disclosed is a sectional table with gussets wherein each gusset is made of a plastic material and is detachably mounted to a channel frame, thereby omitting a drawing process for the channel frame and a welding process of the gussets with the channel frame, which gives some advantages that manufacturing costs substantially decrease and workability and efficiency in assembling are substantially improved.