Abstract:
The present invention relates to a total reflection type optical switch using a polymer insertion type silica optical waveguide and a manufacturing method thereof. The total reflection type optical switch includes a trench formed at an intersection of the silica optical waveguide having two optical paths and a polymer inserted into the trench. The total reflection type optical switch includes a heater for heating the polymer. The polymer is formed with a thermo-optic material, which reduces the refractive index and totally reflects an optical signal when being heated by the heater. In addition, an optical signal penetrates the polymer when the polymer is not heated by the heater. When the polymer is formed with an electro-optic material, the total reflection type optical switch can include upper and lower electrodes instead of the heater so as to apply the electric field to the polymer. In this case, the total reflection type optical switch enables high-speed switching and can be used as a variable optical attenuator by adjusting the applied voltage and current irrespective of the uses of the optical switch. The present invention can improve loss characteristics of the optical signal by transmitting or totally reflecting the optical signal according to changes in the refractive index of the polymer using the refractive index difference between the silica optical waveguide and the polymer according to temperature changes.
Abstract:
The present invention relates to a total reflection type optical switch using a polymer insertion type silica optical waveguide and a manufacturing method thereof. The total reflection type optical switch includes a trench formed at an intersection of the silica optical waveguide having two optical paths and a polymer inserted into the trench. The total reflection type optical switch includes a heater for heating the polymer. The polymer is formed with a thermo-optic material, which reduces the refractive index and totally reflects an optical signal when being heated by the heater. In addition, an optical signal penetrates the polymer when the polymer is not heated by the heater. When the polymer is formed with an electro-optic material, the total reflection type optical switch can include upper and lower electrodes instead of the heater so as to apply the electric field to the polymer. In this case, the total reflection type optical switch enables high-speed switching and can be used as a variable optical attenuator by adjusting the applied voltage and current irrespective of the uses of the optical switch. The present invention can improve loss characteristics of the optical signal by transmitting or totally reflecting the optical signal according to changes in the refractive index of the polymer using the refractive index difference between the silica optical waveguide and the polymer according to temperature changes.
Abstract:
Provided is an optical waveguide splitting device. More particularly, an optical waveguide tap coupler device having a specific split ratio or monitoring an optical signal by splitting a part of the optical signal using an asymmetrical structure. A taper structure connected to an input port is designed to be asymmetrical to control a length and a width of the taper. A Y-branched optical waveguide tap coupler includes an asymmetrical taper having a structure of appropriately controlling widths of two output port waveguides. Also, an optical waveguide tap coupler having an asymmetrical Y- branched structure includes a structure of maintaining constant power ratios of a main waveguide and a tap waveguide by controlling an angle of one output port waveguide connected to one input port waveguide structure. The optical waveguide tap coupler includes a 1 x 2 asymmetrical waveguide structure having a constant split ratio, a low optical loss and a low polarization dependency over a wide wavelength region when an optical power incident to one input port exits to two output ports.
Abstract:
Disclosed herein is a hybrid integrated structure of an optical active device and a Planar Lightwave Circuit (PLC) device using an optical fiber array, in which one or more photodiode are integrated on an upper cladding layer above one or more planar optical waveguides. A section located on a boundary surface between output optical waveguides, that is, an end of the PLC device in the direction of propagation of light, and the input end of an output optical fiber array is ground to be inclined at a predetermined angle with respect to an optical axis. Further, one or more optical fibers and one or more reflection mirrors are alternately arranged, inserted, and disposed in a plurality of V-shaped trenches formed in the output optical fiber array.