Abstract
A triplexer was fabricated based on asymmetric Y branch waveguides Cascade Multimode interference(MMI) for fiber to the home(FTTH).The simulation results of spectral response show that output optical fields are clearly.And the demultiplexing function for download 1 490 nm and 1 550 nm and multiplexing function for upload 1 310 nm were achieved.The simulation results of finited different beam propagation method(FD-BPM) show that insertion loss is less than 1.49 dB;the bandwidths of three response wavelengths meet the demand of ITU.984 completely;the isolation for 1 310 nm is more than 47 dB;the isolation for between 1 490 nm and 1 550 nm is more than 29 dB.
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