Optical injection locking of monolithically integrated photonic source for generation of high purity signals above 100 GHz

Bałakier, Katarzyna; Fice, Martyn J.; Dijk, Frédéric van; Kervella, Gael; Carpintero, Guillermo; Seeds, A.J.; Renaud, Cyril C.

doi:10.1364/oe.22.029404

Cited by 51 publications

(27 citation statements)

References 17 publications

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“…Using the dashed lines for each type of signal (for the case w/ the KK receiver we assume the penalty remains constant and extrapolate the value obtained when no linewidth emulation is performed), one can see that the penalty of BB signals becomes higher than that of the SSB signals, both w/o and w/ KK receiver, for a (ΔνT) product of approximately 1.110 −4 . Assuming a linewidth for the RAU laser of 2 MHz (which is similar to the ones reported for foundry-fabricated DFB lasers [30]) and of 100 kHz for the laser in the CO (linewidth of off-the-shelf ECL lasers), a combined linewidth of 2.1 MHz is obtained, which, solving for T −1 , yields a symbol rate of approximately 19 GBd. For symbol rates lower than this, the envelope detection of SSB signals should be more effective.…”

Section: B Linewidth Tolerancementioning

confidence: 62%

Single Sideband Signals for Phase Noise Mitigation in Wireless THz-Over-Fibre Systems

Gonzalez-Guerrero

Shams

Fatadin

et al. 2018

J. Lightwave Technol.

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In future photonic-based THz backhaul links, integrating the optical local oscillator (LO) in a remote antenna unit can be beneficial in terms of optical bandwidth efficiency and higher compatibility with passive optical networks. In such a scenario, two approaches can be used to reduce the high phase noise associated with free-running lasers: 1) baseband (BB) signals & carrier recovery, and 2) single sideband (SSB) signals & envelope detection. In this paper, we compare the performance of the two approaches for various optical LO linewidths using 5 GBd 16-QAM signals. We find that, for a total linewidth wider than 0.55 MHz, the SSB approach yields better results. The superior performance, however, comes at the expense of reducing the net information spectral density (ISD) of the SSB signal by 39% compared to that of the BB signal. However, using signal-signal beat interference-mitigation algorithms, an ISD only 15% lower than the BB signal ISD was sufficient to meet the FEC requirement. Given these results, we believe that the envelope detection of SSB signals is a promising solution to mitigate the phase noise problem of THz links based on free-running lasers, without excessively compromising the spectral efficiency of the system. Index Terms-Broadband communication, digital signal processing, envelope detectors, microwave photonics, millimeter wave communication, optical mixing, photonic integrated circuits, semiconductor lasers.This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/

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Section: B Linewidth Tolerancementioning

confidence: 62%

Single Sideband Signals for Phase Noise Mitigation in Wireless THz-Over-Fibre Systems

Gonzalez-Guerrero

Shams

Fatadin

et al. 2018

J. Lightwave Technol.

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“…These have led to important progresses for the field of THz communications with highlights such as the development of a single chip transmitter (Fig. 4a) emitting 100 µW at 100 GHz from a total electrical consumption of 1W including cooling 74,75 . That chip was also used successfully in transmission systems 76 .…”

Section: Future Prospect and Challengesmentioning

confidence: 99%

Advances in terahertz communications accelerated by photonics

2016

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“…A schematic of the experimental setup is shown in Figure 3 [11,16,17]. The output of each SFP was fibre coupled using a lensed fibre.…”

Section: Off-chip Experimental Setupmentioning

confidence: 99%

A Comparison between off and On-Chip Injection Locking in a Photonic Integrated Circuit

Perrott

Caro²,

Dernaika³

et al. 2019

Photonics

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The mutual and injection locking characteristics of two integrated lasers are compared, both on and off-chip. In this study, two integrated single facet slotted Fabry–Pérot lasers are utilised to develop the measurement technique used to examine the different operational regimes arising from optically locking a semiconductor diode laser. The technique employed used an optical spectrum analyser (OSA), an electrical spectrum analyser (ESA) and a high speed oscilloscope (HSO). The wavelengths of the lasers are measured on the OSA and the selected optical mode for locking is identified. The region of injection locking and various other regions of dynamical behaviour between the lasers are observed on the ESA. The time trace information of the system is obtained from the HSO and performing the FFT (Fast Fourier Transform) of the time traces returns the power spectra. Using these tools, the similarities and differences between off-chip injection locking with an isolator, and on-chip mutual locking are examined.

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Optical injection locking of monolithically integrated photonic source for generation of high purity signals above 100 GHz

Cited by 51 publications

References 17 publications

Single Sideband Signals for Phase Noise Mitigation in Wireless THz-Over-Fibre Systems

Single Sideband Signals for Phase Noise Mitigation in Wireless THz-Over-Fibre Systems

Advances in terahertz communications accelerated by photonics

A Comparison between off and On-Chip Injection Locking in a Photonic Integrated Circuit

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