Partial Response Signaling Enabled 320/150 GBd OOK/PAM4 Transmission Using a 65 GHz TFLN Modulator for Short-Reach Optical Interconnects

We experimentally demonstrated the transmission of 320 GBd OOK and 150 GBd PAM4 signals within a 62 GHz brick-wall system bandwidth (BW) limit, utilizing Partial Response (PR) encoding, digital anti-aliasing filter, and a packaged thin film lithium niobate (TFLN) modulator. An OOK faster than Nyquist ratio (FTN) of 158% is successfully achieved, with a bit error rate (BER) below the 20% hard-decision forward error correction (HD-FEC) threshold of 1.5e-2.