56 GBaud PAM-4 Direct Detection with High-Speed Avalanche Photodiodes

Beckerwerth, TobiasTobiasBeckerwerthKottke, ChristophChristophKottkeJungnickel, VolkerVolkerJungnickelTropenz, UteUteTropenzMöhrle, MartinMartinMöhrleRunge, PatrickPatrickRungeSchell, MartinMartinSchell2023-09-152023-09-152023https://publica.fraunhofer.de/handle/publica/45070710.23919/OFC49934.2023.101164282-s2.0-85161324141We demonstrate 56 GBaud PAM-4 transmission by using a high-speed waveguide avalanche photodiode (WG APD) and an electro absorption modulated laser (EML). Compared to a PIN photodiode, the WG APD reduces the power budget in a B2B setup by 6 dB.en56 GBaud PAM-4 Direct Detection with High-Speed Avalanche Photodiodesconference paper