Demonstration of PS-QAM Based Flexible Coherent PON in Burst-Mode With 300G Peak Rate and Ultra-Wide Dynamic Range

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“…The OLT receiver will compensate chromatic dispersion (CDC), lock the clock, correct the state of polarization, and handle the frequency offsets, phases, and other channel responses. This approach can significantly enhance the sensitivity, enabling the system to maintain a dynamic range of 20 dB at a data rate of up to 300G [10] and achieve a dynamic range of 39 dB at a speed of 200G [55] . The dynamic range refers to the range of variation in the power of the received signal.…”

“…Coherent optical technology is a powerful solution that has proved its superior sensitivity and high-speed performance in long-haul and core networks. Coherent PONs (CPONs) with high-speed and large dynamic ranges have been demonstrated in recent years [10][11][12] . Low-cost coherent communication systems over 200G have been proposed by simplifying the transceiver [13][14][15] .…”

“…Low-cost coherent communication systems over 200G have been proposed by simplifying the transceiver [13][14][15] . By enhancing the system dynamic range through electric or optical adjustment, 200G coherent PONs with ultra-large dynamic range have been proposed [10,16,17] . Various schemes supporting flexible coherent PON networks over 200G have also been validated [11,[18][19][20] .…”

“…Three typical FLCS-CPON methods are listed in Fig. 1(d), including the time and frequency division multiplexing (TFDM) CPON architecture [19,25] , adaptive coded-modulation approach [11,26] , and probabilistic shaping (PS)-based entropy adjusted CPON [10,18,27,28] . The abbreviations "K," "M," "S," and "P" in the context of FEC coding methods denote the information length, parity length, shortening length, and puncturing length, respectively.…”

Inverse design of a dual-band wavelength demultiplexing power splitter based on two-step hybrid binary-analog optimization

“…In recent years, silicon photonics (SiP) has undergone significant advancements, enabling system integration and improved performance in various application areas, particularly in optical communication 1 . Passive optical network (PON) is a mainstream fiber access technology that plays a crucial role in optical communication 2,3 . However, traditional PON systems based on intensity-modulation and direct detection (IMDD-PON) operating in the O-band, suffer from limited sensitivity characteristics and communication capacity.…”