Hybrid TWDM-PON system of downlink DPSK modulation and uplink direct modulation
A TWDM-PON, direct technology, applied in the field of optical communication, can solve the problems of low cost, increase the cost of ONU transmitter, etc., achieve the effect of reducing cost, easy to upgrade and improve the transmission optical power
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[0042] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0043] The present invention fully utilizes the directly modulated laser with tunable wavelength as the uplink high output power transmitter, improves the power budget of the uplink transmission of the PON system, reduces the cost of the uplink transmitter, and realizes the high-speed colorless transmitter of the ONU at a lower cost module; at the same time, the present invention makes full use of DPSK signals as downlink data signals, which improves the problem of anti-dispersion tolerance of down...
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