A Beyond-1-Tb/s Coherent Optical Transmitter Front-End Based on 110-GHz-Bandwidth 2:1 Analog Multiplexer in 250-nm InP DHBT

Nagatani, Munehiko; Wakita, Hitoshi; Yamazaki, Hiroshi; Ogiso, Yoshihiro; Misawa, Miwa; Ida, M.; Hamaoka, Fukutaro; Nakamura, Masanori; Kobayashi, Takayuki; Miyamoto, Yutaka; Nosaka, Hideyuki

doi:10.1109/jssc.2020.2989579

Cited by 47 publications

(25 citation statements)

References 20 publications

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“…For validating inlineamplified transmission, a WDM signal of a 5.125-THz optical bandwidth corresponding to a 125-GHz-spaced 41-ch signal consisted of a measurement signal and amplified spontaneous emission (ASE)-based interference signal. A Nyquist-pulseshaped 120-Gbaud PS-36QAM signal for measurement was generated using an IQ-modulator (IQM) driven by bandwidthdoubler-based high-speed digital-to-analog converters (DACs) [27,28]. An arbitrary waveform generator with four DACs were used as sub-DACs for the bandwidth doublers.…”

Section: B Cw Light Amplification Characteristicsmentioning

confidence: 99%

Wide-Band Inline-Amplified WDM Transmission Using PPLN-Based Optical Parametric Amplifier

Kobayashi

Shimizu

Nakamura

et al. 2021

J. Lightwave Technol.

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This paper proposes an optical parametric amplifier (OPA), as an inline-repeater, using a periodically-poled-LiNbO3 (PPLN) waveguide with over-10-THz amplification bandwidth, and also presents wide-band wavelength-division-multiplexing (WDM) inline-amplified transmission with the OPA. Our PPLNbased OPA is polarization-independent and has a spectrally efficient configuration by filtering phase-conjugated signals (idlers). We implemented our PPLN-based OPA with half its ideal configuration with an over-10-THz amplification bandwidth because of the limited number of PPLN waveguides. The implemented OPA had 5.125-THz amplification bandwidth, gain of beyond 15 dB, and noise figure of less than 5.1-dB. The gain excludes the 5.6-dB loss of an idler rejection filter employed in the transmission experiment so that the implemented OPA can compensate 9.5-dB link loss of transmission fibers and optical components. A 3 × 30.8-km inline-amplified transmission with 41channel 800-Gbps WDM signal in 125-GHz spacing was successfully demonstrated using our PPLN-based OPA as an inline-repeater. The results also indicate that the OPA's amplification bandwidth can potentially be extended to 10.25 THz.

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Section: B Cw Light Amplification Characteristicsmentioning

confidence: 99%

Wide-Band Inline-Amplified WDM Transmission Using PPLN-Based Optical Parametric Amplifier

Kobayashi

Shimizu

Nakamura

et al. 2021

J. Lightwave Technol.

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“…4. This clocked-SEL circuit concept was preferred to the competing clocked transadmittance (clocked-TAS) concept [1], [9]- [11] shown in Fig. 5.…”

Section: Circuit Concept and Linearity Considerationsmentioning

confidence: 99%

“…A NALOG multiplexers (AMUXs) are used to double or quadruple the output signal bandwidth and sampling rate of digital-to-analog-converters (DACs) by time interleaving. As shown in the state of the art in Table I, sampling rates up to 168and 120 GS/s can be reached by a realization in InP technology [1] and SiGe-Bipolar CMOS (BiCMOS) technology [3], respectively. Currently, the main application area of AMUXs is to increase the transmission capacity per bandwidth in optical communication systems [1], [2].…”

Section: Introductionmentioning

confidence: 99%

“…As shown in the state of the art in Table I, sampling rates up to 168and 120 GS/s can be reached by a realization in InP technology [1] and SiGe-Bipolar CMOS (BiCMOS) technology [3], respectively. Currently, the main application area of AMUXs is to increase the transmission capacity per bandwidth in optical communication systems [1], [2]. In [3], we reported a 2:1 AMUX design that was realized to explore the performance limits of AMUXs in the SiGe-BiCMOS technology toward a targeted 8-bit resolution and a 50-GHz signal bandwidth.…”

Section: Introductionmentioning

confidence: 99%

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Resolution-Related Design Considerations for a 120-GS/s 8-bit 2:1 Analog Multiplexer in SiGe-BiCMOS Technology

Collisi

Möller

2021

IEEE J. Solid-State Circuits

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This article presents a 120-GS/s 2:1 8-bit analog multiplexer (AMUX) in SiGe-Bipolar CMOS (BiCMOS) technology that exhibits the highest effective resolution reported for an AMUX in any kind of semiconductor technology. This article presents the design considerations that have led to this high resolution. In particular, it contains a discussion on the choice of an AMUX circuit concept to support high linearity. A frequency-domain explanatory model for the signal contribution to the effective number of bits (ENoB) in the presence of mismatch errors is presented and applied to the analysis of timing and signal gain mismatch in the AMUX setup. Typical ENoB versus frequency characteristics were identified and utilized to speed up ENoB simulations and to develop calibration procedures for the different mismatch types in the AMUX setup. The results of the analysis and the performance of the AMUX in the calibrated setup were proven by measurement results. Index Terms-Analog multiplexer (AMUX), digital-toanalog-converter (DAC), effective number of bits (ENoB), high speed, linearity explanatory model, SiGe-Bipolar CMOS (BiCMOS).

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“…A 2-to-1 analog multiplexer (AMUX) using 130 nm SiGe BiCMOS is reported in [14] with an analog bandwidth >67 GHz and a measured sampling rate of 56 GS/s. In [16] a 55 nm SiGe BiCMOS 2-to-1 AMUX with a sampling rate of 120 GS/s is reported with a large power consumption of 2.2 W. The 2-to-1 AMUX from [15] achieved >110 GHz analog bandwidth at 180 GS/s using a 0.25 µm InP HBT process, however, requiring digital pre-processing to compensate the limited switching speed [17]- [19]. In [20] we reported a 4-to-1 interleaver with an analog bandwidth beyond Nyquist at sampling rates up to 100 GS/s using a 55 nm SiGe BiCMOS.…”

Section: Introductionmentioning

confidence: 99%

A 100-GS/s Four-to-One Analog Time Interleaver in 55-nm SiGe BiCMOS

Ramon

Verplaetse

Vanhoecke

et al. 2021

IEEE J. Solid-State Circuits

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We demonstrate a 4-to-1 100 GS/s time-interleaver realized in a 55 nm BiCMOS technology. The interleaver comprises two stages of 2-to-1 sub-interleavers. Each sub-interleaver is implemented using a return-to-zero generation and summing architecture. This sub-interleaver architecture ensures lower clock feedthrough and contains an inherent feed-forward equalizer. ENOB measurements have been performed revealing the interleaver's ENOB of 4.9 at 3 GHz. Additionally, the transfer function is measured to show the capabilities of the inherent feedforward equalizer of the sub-interleavers. The measured analog output bandwidth of the 4-to-1 interleaver is 73 GHz. Last, a 100 GBd PAM-4 (200 Gb/s) signal is generated by interleaving four 25 GBd PAM-4 streams, while consuming 700 mW.

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A Beyond-1-Tb/s Coherent Optical Transmitter Front-End Based on 110-GHz-Bandwidth 2:1 Analog Multiplexer in 250-nm InP DHBT

Cited by 47 publications

References 20 publications

Wide-Band Inline-Amplified WDM Transmission Using PPLN-Based Optical Parametric Amplifier

Wide-Band Inline-Amplified WDM Transmission Using PPLN-Based Optical Parametric Amplifier

Resolution-Related Design Considerations for a 120-GS/s 8-bit 2:1 Analog Multiplexer in SiGe-BiCMOS Technology

A 100-GS/s Four-to-One Analog Time Interleaver in 55-nm SiGe BiCMOS

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