| 摘要 |
The present invention relates to an optical detection device in a laser seed lightwave-based WDM-PON (Wavelength Division Multiplexing-Passive Optical Network), and a method for same. More particularly, the present invention provides an optical detection device in a WDM-PON for detecting an electrical signal by controlling a phase between seed lightwave and up-signal light and polarized light on a real-time basis (First embodiment), detecting an electrical signal by controlling only a phase between seed lightwave and up-signal light on a real-time basis (Second embodiment), and detecting an electrical signal without controlling a phase between seed lightwave and up-signal light and polarized light on a real-time basis (Third embodiment), and a method for same. The optical detection device of the present invention includes an optical splitter for splitting seed lightwave and up-signal light generated from an optical network unit on the basis of the seed lightwave; a horizontal polarized light controller for controlling horizontal polarized light relative to the split seed lightwave; a vertical polarized light controller for controlling vertical polarized light relative to the split seed lightwave; a controller for controlling a phase of the seed lightwave wherein the horizontal polarized light is controlled and a phase of the seed lightwave wherein the vertical polarized light is controlled, on the basis of an electrical signal; an optical coupling and signal converting unit for coupling the seed lightwave wherein the horizontal polarized light and phase are controlled, the seed lightwave wherein the vertical polarized light and phase are controlled, and the split up-signal light, converting the coupled light into an electrical signal, and transmitting the signal to the controller; and a signal detector for detecting an up-signal corresponding to the up-signal light on the basis of the electrical signal. |
