5 papers · 1 filter
220-GBd optical coherent waveform generation using temporal unitary transforms
Callum Deakin, Xi Chen, Di Che
We use temporal unitary transforms to generate 16-QAM up to 220 GBd using only 50-GHz electrical bandwidth. The technique is theoretically lossless and can generate arbitrary optic…
Spectro-temporal unitary transformations for coherent modulation: design trade-offs and practical considerations
Callum Deakin, Xi Chen
This paper analyzes the performance of spectro-temporal unitary transforms for coherent optical modulation. Unlike conventional IQ modulation, such transforms are based on a cascad…
Optical arbitrary waveform generation using spectro-temporal unitary transforms
Callum Deakin
We discuss the prospect of using cascaded phase modulators and dispersive elements to achieve arbitrary optical waveform generation. This transform is not limited by the bandwidth…
314-GBaud Single-Wavelength Signaling Generated All-Electronically by a 158-GHz Digital-Band-Interleaved DAC
Di Che, Callum Deakin, Xi Chen
We demonstrate an all-electronic generation of 314-GBaud PS 8-ASK signals by a 158-GHz digital-band-interleaved DAC. The signals drive a thin-film LiNbO3 modulator that achieves ov…
2.4-THz Bandwidth Optical Coherent Receiver Based on a Photonic Crystal Microcomb
Callum Deakin, Jizhao Zang, Xi Chen +5
We demonstrate a spectrally-sliced single-polarization optical coherent receiver with a record 2.4-THz bandwidth, using a 200-GHz tantalum pentoxide photonic crystal microring reso…