A5009491405- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Neural Networks and Reservoir Computing
- Advanced Fiber Optic Sensors
- Advanced Optical Network Technologies
- Interconnection Networks and Systems
RWTH Aachen University
2019-2024
The effect of phase noise introduced by optical sources in spectrally-sliced optically enabled DACs and ADCs is modeled analyzed detail. In both data converter architectures, a mode-locked laser assumed to provide an comb whose lines are used either synthesize or analyze individual spectral slices. While the central MLL line as well other carriers system architectures have minor impact on performance, RF fundamentally limits it. particular, corresponding jitter pulse train transferred almost...
We demonstrate an optical arbitrary waveform measurement (OAWM) system that exploits a bank of silicon photonic (SiP) frequency-tunable coupled-resonator waveguide (CROW) filters for gapless spectral slicing broadband signals. The slices are coherently detected using frequency comb as multi-wavelength local oscillator (LO) and stitched together by digital signal processing (DSP). For high-quality reconstruction, we have implemented maximum-ratio combining (MRC) technique based on precise...
Electrical-optical signal processing has been shown to be a promising path overcome the limitations of state-of-theart all-electrical data converters. In addition ultra-broadband processing, it allows leveraging ultra-low jitter mode-locked lasers and thus increasing aperture limited effective number bits at high analog frequencies. this paper, we review our recent progress towards optically enabled time-and frequency-interleaved analog-to-digital converters, as well their monolithic...
We propose a new signaling scheme for on-chip optical-electrical-optical artificial neural networks that utilizes orthogonal delay-division multiplexing and pilot-tone-based self-homodyne detection. This offers more efficient scaling of the optical power budget with increasing network complexity. Our simulations, based on 220 nm silicon-on-insulator silicon photonics technology, suggest can support 31×31 neurons, 961 links freely programmable weights, using single 500 mW comb signal-to-noise...
Semiconductor mode-locked lasers can be used in a variety of applications ranging from multi-carrier sources for WDM communication systems to time base references metrology. Their packaging compact chip- or module-level remains however burdened by their strong sensitivity back-reflections, quickly destroying the coherence mode-locking. Here, we investigate stabilization directly edge coupled silicon photonic integrated circuit, with objective moving isolators downstream output circuit. A...
We demonstrate optical arbitrary waveform measurement (OAWM) using a silicon pho-tonic spectral slicer. Exploiting maximal-ratio combining (MRC), we the viability of scheme by reconstructing 100-GBd 64QAM signals with high quality.
We present optimized hourglass-shaped resonator CROW filters showing an improved power consumption of up to 30% when compared with standard circular ring shapes. Metal and doped waveguide heaters are in terms efficiency, crosstalk insertion losses.
We propose and model an optical communication scheme for short distance datacom links based on the distribution of information across a wide comb spectrum. This modulation format, orthogonal delay division multiplexing, allows multiplexing data streams from multiple modulators, as well deserialization equalization in domain. A concrete system, that transport 400 Gb/s single CWDM channel with 80 GHz cutoff lithium niobate insulator modulator, is modeled under consideration all noise sources...
We propose a new signaling scheme for on-chip optical-electrical-optical artificial neural networks that utilizes orthogonal delay division multiplexing and pilot-tone based self-homodyne detection. This offers more efficient scaling of the optical power budget with increasing network complexity. Our simulations, on 220 nm SOI silicon photonics technology, suggest can support 31 x neurons, 961 links freely programmable weights, using single 500 mW comb an SNR 21.3 dB per neuron. Moreover, it...
We present the design and experimental characterization of a silicon nitride pulse interleaver based on coupled resonator optical waveguide filters. In order to achieve targeted free spectral range 1.44 THz, which is large given reduced confinement platform, individual ring resonators are designed with tapered waveguides. Its application time-interleaved photonically-assisted ADCs analyzed by combining photonic integrated circuit comprehensive model entire ADC. The impact fundamental signal...
We propose a new signaling scheme for on-chip optical-electrical-optical artificial neural networks that utilizes orthogonal delay division multiplexing and pilot-tone based self-homodyne detection. This offers more efficient scaling of the optical power budget with increasing network complexity. Our simulations, on 220 nm SOI silicon photonics technology, suggest can support 31 x neurons, 961 links freely programmable weights, using single 500 mW comb an SNR 21.3 dB per neuron. Moreover, it...
We propose a new signaling scheme for on-chip optical-electrical-optical artificial neural networks that utilizes orthogonal delay-division multiplexing and pilot-tone based self-homodyne detection. This offers more efficient scaling of the optical power budget with increasing network complexity. Our simulations, on 220 nm SOI silicon photonics technology, suggest can support 31 x neurons, 961 links freely programmable weights, using single 500 mW comb an SNR 21.3 dB per neuron. Moreover, it...
We propose and model an optical communication scheme for short distance datacom links based on the distribution of information across a wide comb spectrum. This modulation format, orthogonal delay division multiplexing, allows multiplexing data streams from multiple modulators, as well deserialization equalization in domain. A concrete system, that transport 400 Gb/s single CWDM channel with 80 GHz cutoff lithium niobate insulator modulator, is modeled under consideration all noise sources...
Novel analog-to-digital converter (ADC) architectures are motivated by the demand for rising sampling rates and effective number of bits (ENOB). The main limitation on ENOB in purely electrical ADCs lies relatively high jitter oscillators, order a few tens fs state-of-the-art components. When compared to extremely low obtained with best-in-class Ti:sapphire mode-locked lasers (MLL), attosecond range, it is apparent that mixed electrical-optical architecture could significantly improve...
The following topics are dealt with: III-V semiconductors; Ge-Si alloys; wide band gap BiCMOS integrated circuits; gallium compounds; heterojunction bipolar transistors; semiconductor device models; high electron mobility low noise amplifiers; and HEMT circuits.
We present optimized hourglass-shaped resonator CROW filters showing an improved power consumption of up to 30% when compared with standard circular ring shapes. Metal and doped waveguide heaters are in terms efficiency, crosstalk insertion losses.