Publications (9)
Performance limits of spectro-temporal unitary transformations for coherent modulation
Callum Deakin, Xi Chen
We analyse the performance limits of coherent modulation based on lossless unitary transformations, demonstrating that they can achieve high (30~dB) SINAD and outperform convent…
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…
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…
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…
Multipoint-to-point data aggregation using a single receiver and frequency-multiplexed intensity-modulated ONUs
Zichuan Zhou, Jinlong Wei, Kari A. Clark +6
We demonstrate 2.5-GHz-spacing frequency multiplexing capable of aggregating 64 intensity-modulated end-users using low-speed electronic and optoelectronic components. All optical…
Dual Frequency Comb Assisted Analog-to-Digital Conversion of Subcarrier Modulated Signals
Callum Deakin, Zhixin Liu
Photonic analog to digital conversion offers promise to overcome the signal-to-noise ratio (SNR) and sample rate trade-off in conventional analog to digital converters (ADCs), crit…