We extend our previous works on downstream 100G/λ C-band IM-DD PON using slot-by-slot CD precompensation by experimentally demonstrating a novel solution for supporting 0-20 km differential distance including a common header field.
We experimentally demonstrate a deep unfolding approach for parameter optimization in MIMO adaptive equalization with separated carrier phase estimation and frequency offset compensation, achieving a significant reduction in optimization cost while attaining optimal equalization performance.
We present a 19-core-MCF-coupled co-packaged optical chiplet integrating backside-emitting VCSEL and backside-illuminated PD arrays flip-bonded to driver–TIA EICs. Fundamental optical performance and thermal-path feasibility are demonstrated, with envisioned scalability toward multi-chiplet GPU optical interconnects.
Deep learning enables geometric sensing for efficient profiling applications. We present a surface profiler based on a codesigned encoder-decoder pair consisting of reconfigurable integrated sampler and 1D-CNN, achieving ~17µm vertical and ~30µm lateral accuracy, respectively.
We demonstrate Ge photodetector with high-quality Ge growth in silicon recess and optimized lateral P-i-N diode, enabling uniform wafer-scale performance of >100 GHz bandwidth, >1.1 A/W responsivity, and <25 nA dark current at -2 V.
An improved MPI detection method is proposed based on the Calibrated Variance Difference of the modulation levels. The influences of noise and extinction ratio on the MPI indicator are minimized.
We experimentally demonstrate the first mode-resolved fiber-longitudinal power monitoring (LPM) in a three-mode fiber link by extending the receiver-side-DSP-based LPM algorithm to multi-mode transmission, enabling location-resolved mode-dependent loss (MDL) monitoring down to 1 dB.
A progressive first-hit routing and wavelength assignment framework is proposed for multi-fiber optical networks equipped with blocking optical cross-connects, which can achieve up to 460-fold reduction in running time without any sacrifice in blocking probability.
We experimentally demonstrate integrated sensing and communication over 480-km single-mode fiber with low-cost 12.5-MHz linewidth DFB laser, achieving single-wavelength 1.07-Tb/s transmission with residual carrier-based phase tracking, and long-distance forward vibration sensing with phase noise separation.
A hybrid-integrated optical transmitter comprising of a SiPh TW-MZM wire-bond with co-designed BW-boosted driver in SiGe BiCMOS is presented. Experimental results demonstrate 336Gb/s/lane PAM-8 optical eye diagrams at 2.47pJ/bit power consumption.
We report a comparison between power-meter, OTDR and wavelength-resolved methods for measuring crosstalk in a weakly coupled multicore fiber revealing trade-offs in accuracy, dynamic range, and practicality for network deployment.
Co-propagation of QKD and deployed OTN in shared fiber requires consideration various noise, including stimulated Raman scattering. This work systematically compares the transmission performance of CV/DV-QKD co-propagation with deployed DWDM C-100G/C+L-400G OTN signal. © 2026 The Author(s)
We experimentally demonstrate a range of learnable optical activations using SOA-based SPM-induced spectral broadening followed by spectral filtering, deploying them in a photonic Kolmogorov Arnold Network with excellent performance in both regression and classification tasks.
We demonstrate an ultra-compact (1.22 cm2 footprint), high-energy-efficient (4.5 pJ/bit), 53-Gbaud × 8-channel 1060-nm SM VCSEL-based CPO transceiver enabling 2-km SMF parallel links. A newly designed two-microlens-array coupling system achieves <2 dB loss.
We propose enhanced LSTM-based signal recovery for flexible downstream PON with 25 G-class devices. Experimental results indicate an optical power budget of 20.2 dB and a record net bit rate >202 Gb/s in bandwidth-limited 240 Gb/s direct-detection transmission @2E-2.
We propose a method to compensate the phase offset between samples from different tributaries in time-interleaved phase OTDR using nested phase reference channels. We demonstrate our method for a four-span bidirectional link with high-loss loopback. © 2025
We propose an ultra-fast frequency-hopping scheme incorporating decoy tones. Multi-point frequency-hopping is achieved with a band of 70GHz and a hopping period of 5ns. The decoy signals show 99.6% constellation-quality similarity yet a ~50% BER.
We demonstrate a C-band thin-film lithium tantalate (TFLT) Mach–Zehnder modulator with Vπ of 1.35 V and >110 GHz electro-optic bandwidth, enabling record-high line (net) data rate of 768 (536) Gbit/s on the TFLT platform.
We propose and demonstrate 3D photonic interposer with AWGRs designed for chiplet-to-chiplet all-to-all interconnection. 3D ultrafast laser inscription (ULI) technique achieves low loss coupling between silicon photonic chiplets through the photonic interposer with the AWGR.
