Optical splitter of passive optical network and optical signal processing method

A method for processing optical signals of a passive optical network, applied to an optical splitter of a passive optical network, the method comprising:

• splitting input optical signals into a plurality of sub-signals through a planar lightwave circuit optical splitter according to power;
• inputting the plurality of sub-signals into a thin film filter chip module in a planar lightwave circuit filter array, wherein each of the sub-signals is input into one thin film filter chip in the thin film filter chip module;
• and
• filtering the plurality of sub-signals through the thin film filter chip module to obtain a plurality of target sub-signals;
• wherein the optical splitter of the passive optical network, comprises:
• the planar lightwave circuit optical splitter and the planar lightwave circuit filter array, wherein the planar lightwave circuit filter array is composed of the thin film filter chip module, a plurality of common ports, a plurality of reflection ports, and a plurality of transmission ports, and the thin film filter chip module comprises a plurality of thin film filter chips;
• and
• the common ports, the reflection ports and the transmission ports in the planar lightwave circuit filter array are respectively connected to the thin film filter chips through optical paths formed by lightwave circuits respectively, the thin film filter chips are configured to transmit optical signals having a preset wavelength and reflect optical signals having wavelengths other than the preset wavelength, and the target sub-signals comprise transmission sub-signals and/or reflection sub-signals.

A system for processing optical signals of a passive optical network, comprising:

• M stages of optical splitters, wherein the M stages of optical splitters comprise a ith stage optical splitter and (i+1)th stage optical splitters, the ith stage optical splitter and the (i+1)th stage optical splitters are the optical splitter of a passive optical network, and each branch port of the ith stage optical splitter is connected to a common port of one (i+1)th stage optical splitter, wherein M is an integer greater than 1, and i is any integer from 1 to M−1;
• and
• in a case where each of the ith stage optical splitter comprises N branch ports, each of the branch ports of the ith stage optical splitter is connected to a common port of N (i+1)th stage optical splitters;
• wherein the optical splitter of the passive optical network, comprises:
• a planar lightwave circuit optical splitter and a planar lightwave circuit filter array, wherein the planar lightwave circuit filter array is composed of a thin film filter chip module, a plurality of common ports, a plurality of reflection ports, and a plurality of transmission ports, and the thin film filter chip module comprises a plurality of thin film filter chips;
• the planar lightwave circuit optical splitter is used for splitting input optical signals into a plurality of sub-signals according to power and inputting the plurality of sub-signals into the corresponding thin film filter chips in the planar lightwave circuit filter array, and each of the sub-signals is input into one of the thin film filter chips;
• the thin film filter chip module is used for filtering the plurality of sub-signals and outputting a plurality of target sub-signals;
• and
• the common ports, the reflection ports and the transmission ports in the planar lightwave circuit filter array are respectively connected to the thin film filter chips through optical paths formed by lightwave circuits respectively, the thin film filter chips are configured to transmit optical signals having a preset wavelength and reflect optical signals having wavelengths other than the preset wavelength, and the target sub-signals comprise transmission sub-signals and/or reflection sub-signals.