A WDM Capable SiP Polarization Compensator That Isolates the Carrier Laser

We demonstrate a SiP O-band transmitter, autonomously compensating for any injected laser state of polarization (SOP), achieving net 105 and 154 Gbps PAM4 and PAM8 transmission below the Hard-Decision and Soft-Decision FEC thresholds, respectively, with the carrier laser remotely connected to the transmitter over 1 km of single-mode fiber. To enable autonomy, a feedback gradient descent algorithm is implemented, with the starting point determined by the polarimeter, to mitigate the polarization-dependent loss on the device. Additionally, the wavelength dependence and performance of the transmitter are experimentally determined to increase the effective net rate. An emulated WDM transmission was then performed at the 1304.58 nm and 1309.14 nm wavelengths, achieving net 224 and 307 Gbps OOK and PAM4 performance, below the Hard-Decision and Soft-Decision forward error correction thresholds, respectively.