Roll-Off Factor Analysis of Optical Nyquist Pulses Generated by an On-Chip Mach-Zehnder Modulator

De, Souvaraj; Singh, Karanveer; Kress, Christian; Das, Ranjan; Schwabe, Tobias; Preubler, Stefan; Kleine‐Ostmann, Thomas; Scheytt, J. Christoph; Schneider, Thomas

doi:10.1109/lpt.2021.3112485

Cited by 11 publications

(9 citation statements)

References 24 publications

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“…The intensity transfer function of the simulation is different from that in the experiment because of insufficiencies in the fabrication process. At 1.2 V DC bias, a modulation depth of around -12 dB was obtained, and working at this low modulation depth will increase the effect of the higher order sidebands and hence the quality of the sampling [26] [27]. For sampling, the LD with an input power of 0 dBm was adjusted to the resonance point of the ring modulator (1553.43 nm).…”

Section: A Simulation Resultsmentioning

confidence: 99%

“…A bias of 0.95 V would result in a higher bandwidth of 1 GHz but also in a low modulation depth of 5 dB, since there is a tradeoff between the bandwidth and modulation depth [28]. Working at lower modulation depths would increase the sideband power and affects the flatness of the frequency comb, which would result in lower quality sampling [26] [27].…”

Section: B Experimental Resultsmentioning

confidence: 99%

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Low Power, Compact Integrated Photonic Sampler Based on a Silicon Ring Modulator

et al. 2022

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Sampling is the primary functional step of an analogue to digital conversion, required for sensing, measurement, signal processing, metrology, and various data communication applications. Here we present, for the first time, to the best of our knowledge, the optical sampling of different microwave signals with sinc-pulse sequences with a very compact integrated silicon photonics ring modulator. By a simple time interleaving with three branches, the employed ring modulator enables ultra-compact photonic integrated analog to digital converters with a sampling rate of three times the RF bandwidth of itself and of the used photodetector and electronic devices. Therefore, its analogue bandwidth is 50% higher than the RF bandwidth of the incorporated electronics and photonics. Thus, the method might enable high-bandwidth analogue to digital converters with ultracompact footprint and lower power consumption for future communication systems, sensors, and measurement devices.

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Section: A Simulation Resultsmentioning

confidence: 99%

Section: B Experimental Resultsmentioning

confidence: 99%

Low Power, Compact Integrated Photonic Sampler Based on a Silicon Ring Modulator

et al. 2022

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“…In the past decade, many methods for generating Nyquist pulses have been reported, such as digital signal processing [10], spectral filtering shaper [11], and optical parametric amplifier [12]. Recently, direct synthesizing Nyquist pulses of exceptional quality using optical frequency comb (OFC) modulated by electro-optic modulators (EOMs) has been proposed [13], [14], [15], [16], [17], [18], [19], [20]. The pulse repetition rate is determined by the frequency interval f m between adjacent spectral lines of OFC and the zero-crossing pulse duration τ r is τ r = 2/(N • f m )(N is the number of spectral lines of OFC).…”

Section: Introductionmentioning

confidence: 99%

“…Nyquist pulse by increasing the number of spectral lines N because the limited f m decided by the bandwidth of the modulator used. A single Mach-Zehnder modulator (MZM) [13] or a single dual-parallel Mach-Zehnder modulator (DPMZM) [14] could achieve up to 3 or 5 flat spectral lines and the corresponding Nyquist pulse duration is about 100 ps. Two cascaded MZMs were proposed in [1], [15], [16], while the number of generated spectral lines is still no more than 9, resulting in a pulse duration of minimum 12.8 ps.…”

Section: Introductionmentioning

confidence: 99%

Flexible Tunable Nyquist Pulse Generation Using Recirculating Frequency Shift Loop

et al. 2023

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A novel method of optical Nyquist pulse generation based on recirculating frequency shift loop (RFSL) is proposed and experimentally demonstrated. In this article, a large number of flat phase-locked comb lines output from RFSL are used to synthesize Nyquist pulse, which has ultra-narrow and flexible tunable pulse width. It is the first time to theoretically analyze the condition of Nyquist pulse generation by RFSL in detail. In the experiment, the number of flat spectral lines is continuously tuned in the range of 10 to 40 corresponding to the pulse width of 8.9 ps to 2.4 ps. Meanwhile, Nyquist pulses with tunable repetition rate from 7.5 GHz to 15 GHz are obtained experimentally.

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“…The most popular design satisfying the above mentioned requirements is the socalled raised-cosine (RC) pulse [3], which has been widely employed in numerous practical digital communications systems, e.g. see [5], [6], [7], [8], [9], [10], and [11] and references therein.…”

Section: Introductionmentioning

confidence: 99%

A New Family of Nyquist Pulses With Improved Performance

Gazouleas,

Sagias,

Batistatos

et al. 2023

IEEE Access

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Roll-Off Factor Analysis of Optical Nyquist Pulses Generated by an On-Chip Mach-Zehnder Modulator

Cited by 11 publications

References 24 publications

Low Power, Compact Integrated Photonic Sampler Based on a Silicon Ring Modulator

Low Power, Compact Integrated Photonic Sampler Based on a Silicon Ring Modulator

Flexible Tunable Nyquist Pulse Generation Using Recirculating Frequency Shift Loop

A New Family of Nyquist Pulses With Improved Performance

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