Article
Engineering, Electrical & Electronic
Hiroshi Yamazaki, Yoshihiro Ogiso, Masanori Nakamura, Teruo Jyo, Munehiko Nagatani, Josuke Ozaki, Takayuki Kobayashi, Toshikazu Hashimoto, Yutaka Miyamoto
Summary: We demonstrate a new optical-domain bandwidth extension technology using a simple optical configuration. By using an integrated optical phase-interleaving in-phase-and-quadrature modulator (PI-IQM) with a digital spectral weaver (DSW), we can synthesize optical signals with twice the analog bandwidth of digital-to-analog converters (DACs). The PI-IQM was fabricated using an InP n-p-i-n platform and tested with driving signals generated by the DSW and DACs, achieving net data rates of 1.68 Tbps at back to back and 1.64 Tbps after 80-km transmission.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yu Yamasaki, Takuya Nakamichi, Yuta Kaihori, Gabriella Cincotti, Tsuyoshi Konishi
Summary: The experimental demonstration of a novel 100-GHz serial-to-parallel converter based on FrOFDM showed successful optical restoration of a 10-GHz sinusoidally modulated Nyquist-OTDM serial signal, as well as promising performance in QPSK modulation.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Hiroshi Yamazaki, Masanori Nakamura, Takashi Goh, Toshikazu Hashimoto, Yutaka Miyamoto
Summary: By utilizing optical time interleaving technology, we have extended the bandwidth of optical transmitters, generating optical signals with larger bandwidth. This technology, implemented through IQ modulators, allows the bandwidth of optical signals to be expanded to twice that of each side of the optical carrier.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Pietro Caragiulo, Oscar Elisio Mattia, Amin Arbabian, Boris Murmann
Summary: This article introduces a compact 2x time-interleaved switched-capacitor digital-to-analog converter (DAC) for digital-intensive transmitter architectures, which departs from traditional current steering approach and achieves high performance parameters on 16-nm CMOS with low power consumption. The design achieves high SFDR and low IM3 while consuming low power.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2021)
Article
Engineering, Electrical & Electronic
Jihyun Baek, Hyungil Chae
Summary: In this paper, a time-interleaved noise-shaping successive approximation register analog-to-digital converter (ADC) is proposed for wide bandwidth, high resolution, and low power consumption. A fully passive switched-capacitor integrator based on a single capacitor and a single-input comparator is used for 1st-order noise shaping with low power consumption. The SAR conversion is split into coarse and fine conversions to allow noise shaping in the time-interleaved structure to maximize the bandwidth. The prototype ADC achieves a signal-to-noise and distortion ratio of 65.37 dB, a bandwidth of 75 MHz at a sampling rate of 600 MHz, and a power consumption of 4.015 mW with a 1.1 V supply. The proposed TINS SAR ADC improves speed and accuracy with good power efficiency, as evidenced by a Walden figure-of-merit (FoM) of 17.65 fJ/conv.-step and a Schreier FoM of 168.1 dB.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Sameer Arora, Poras T. Balsara, Dinesh Bhatia
Summary: The article proposes a novel DPWM architecture with high resolution, linearity, monotonic behavior, and extremely fast frequency hopping ability. The effectiveness of the method is verified through simulation and experiments, and the advantages and applications of the proposed method are discussed.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Francesco Centurelli, Pietro Monsurro, Alessandro Trifiletti, Mauro D'Arco, Leopoldo Angrisani
Summary: Innovative digitizers combine analog and digital processing to achieve high bandwidth and sampling rate. Calibration is crucial for improving performance, and finite impulse response filtering is used for gain equalization and aliasing removal. This paper proposes a general method for identifying calibration filters and applying them to digitizers with different numbers of channels.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Electrical & Electronic
Masoud Mohammadi, Forouzan Habibi, Mahmood Seifouri, Saeed Olyaee
Summary: This paper investigates the application of photonic analog-to-digital converters in integrated optical circuits, which can generate binary codes for faster data transfer. By using power and wavelength discretizers and coders, the optimal structure with the best specifications can be found. Adjusting the coupling coefficients can improve the operation and switching speed of the optical ADC, as well as reduce power consumption.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Sajjad Moshfe, Kambiz Abedi, Mohammad Kazem Moravvej-Farshi
Summary: This paper presents a novel fully integrated ultra-small low-power all-optical analog to digital converter by integrating InP/InGaAsP/InP Photonic crystal semiconductor optical amplifier with photonic crystal channel drop filters. By utilizing self-phase modulation and frequency coding, the design successfully shifts the frequency of a Gaussian pulse and converts it to four digital output levels. The proposed design offers a compact footprint of 142 μm(2) AO-ADC working at 10 Gs/s, minimizing integral and differential nonlinearity errors.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Oner Hanay, Erkan Bayram, Stefan Mueller, Mohamed Saeed, Ahmed Hamed, Renato Negra
Summary: This article presents a fully integrated transmitter based on a Fourier-domain digital-to-analog converter, achieving a coherent bandwidth up to 2 GHz while reducing the DAC sampling rate and entire DSP speed. The technique also provides intrinsic spectral shaping, increasing spectral efficiency of the output signal, with a maximum demonstrated data rate of 4 Gb/s.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Yang Azevedo Tavares, Minjae Lee
Summary: This article introduces a foreground time-interleaved analog-to-digital converter mismatch calibration method, which can be adapted to any interleaving factor and calibrate overall frequency-dependent mismatches. The proposed scheme is highly suited to state-of-the-art transceivers without the need for extra analog expensive circuitry or input signal purity.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Optics
Yue Liu, Jifang Qiu, Chang Liu, Yan He, Ran Tao, Jian Wu
Summary: This study proposes an OADC scheme with enhanced bit resolution using an MMI coupler as optical quantization, and establishes a mathematical simulation model to verify feasibility and investigate robustness. Simulation results show that the scheme achieves 20 quantization levels with only 6 channels, indicating its potential and requiring fewer channels or modulators to achieve the same amount of ENOB.
Article
Engineering, Electrical & Electronic
Vartika Rao, Sanjoy Mandal
Summary: This paper presents a new design, simulation, and analysis of all-optical analog-to-digital converters (ADC) based on silicon waveguide. The proposed structure consists of a nonlinear magnitude comparator, synchronous up counter, and optical digital to analog converter (DAC). The system is modelled using silicon optical micro-ring resonator (OMRR) and the performance is evaluated by comparing the numerical simulations with theoretical results. The parameters such as OMRR radius and detuning are analyzed to measure system performance.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Sajjad Moshfe, Kambiz Abedi, Mohammad Kazem Moravvej-Farshi
Summary: In this study, a fully integrated all-optical 3-bit analog to digital converter (AO-ADC) was designed by integrating a photonic crystal based semiconductor optical amplifier (PhC-SOA) with channel drop filters (CDFs). The experimental results showed that the proposed structure achieved high conversion efficiency and stability, converting analog photonic signals into digital output with minimal size and power consumption.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Feitong Wu, Xuan Guo, Hanbo Jia, Xiuheng Wu, Zeyu Li, Ben He, Danyu Wu, Xinyu Liu
Summary: This paper introduces a single-channel 12-bit, 2 GS/s pipelined analog-to-digital converter (ADC) for wideband sampling receivers. The design utilizes a novel source follower input buffer with multiple feedback loops to improve sample linearity and extend bandwidth. Additionally, an improved two stages charge pump amplifier topology is introduced, which doubles the Gain Bandwidth Product (GBW) without consuming additional power. A multi-level dither strategy is employed to address the back-end ADC and background calibration, utilizing a new high-speed and low-cost uniform distribution pseudorandom code generator. The prototype ADC fabricated in 40 nm CMOS process achieves 68.24 dB SFDR up to Nyquist frequency with a sampling rate of 2 GS/s. Measurement results demonstrate a bandwidth exceeding 5 GHz, resulting in a Schreier FOMs of 152.4 dB.
Article
Engineering, Electrical & Electronic
A. H. Gnauck, P. J. Winzer, G. Raybon, M. Schnecker, P. J. Pupalaikis
IEEE PHOTONICS TECHNOLOGY LETTERS
(2010)
Article
Engineering, Electrical & Electronic
Gregory Raybon, Peter J. Winzer, Andrew A. Adamiecki, Alan H. Gnauck, Agnieszka Konczykowska, Filipe Jorge, Jean-Yves Dupuy, Larry L. Buhl, Christopher R. Doerr, Roger Delbue, Peter J. Pupalaikis
IEEE PHOTONICS TECHNOLOGY LETTERS
(2011)
Article
Engineering, Electrical & Electronic
R. Ryf, M. A. Mestre, S. Randel, C. Schmidt, A. H. Gnauck, R. -J. Essiambre, P. J. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D. W. Peckham, A. McCurdy, R. Lingle
IEEE PHOTONICS TECHNOLOGY LETTERS
(2012)
Proceedings Paper
Engineering, Electrical & Electronic
Peter J. Pupalaikis, Brian Yamrone, Roger Delbue, Amarpal S. Khanna, Kaviyesh Doshi, Balamurali Bhat, Anirudh Sureka
2014 IEEE BIPOLAR/BICMOS CIRCUITS AND TECHNOLOGY MEETING (BCTM)
(2014)
Proceedings Paper
Engineering, Electrical & Electronic
R. Ryf, S. Randel, N. K. Fontaine, M. Montoliu, E. Burrows, S. Corteselli, S. Chandrasekhar, A. H. Gnauck, C. Xie, R. -J. Essiambre, P. J. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, L. Gruner-Nielsen, R. V. Jensen, R. Lingle
2013 OPTICAL FIBER COMMUNICATION CONFERENCE AND EXPOSITION AND THE NATIONAL FIBER OPTIC ENGINEERS CONFERENCE (OFC/NFOEC)
(2013)
Proceedings Paper
Engineering, Electrical & Electronic
R. Ryf, M. A. Mestre, S. Randel, X. Palou, A. H. Gnauck, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, R. Lingle
2013 OPTICAL FIBER COMMUNICATION CONFERENCE AND EXPOSITION AND THE NATIONAL FIBER OPTIC ENGINEERS CONFERENCE (OFC/NFOEC)
(2013)
