A Monolithic MQW InP/InGaAsP-Based Comb Generator

Renaud, Cyril C.; Pantouvaki, Marianna; Grégoire, Stéphanie; Lealman, I.F.; Cannard, P.; Gwilliam, R.; Seeds, A.J.

doi:10.1109/mwp.2006.346511

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Several techniques have been developed over recent years and compact sources are now available, either fiber or semiconductor based [55]- [57]. A simple approach is to use a phase modulated laser.…”

Section: Coherent Signal Generationmentioning

confidence: 99%

TeraHertz Photonics for Wireless Communications

Seeds

Shams

Fice

et al. 2015

J. Lightwave Technol.

316

120

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Optical fibre transmission has enabled greatly increased transmission rates, with 10 Gb/s common in local area networks. End users find wireless access highly convenient for mobile communication. However, limited spectrum availability at microwave frequencies results in per-user transmission rates limited to much lower values, 500 Mb/s for 5 GHz band IEEE 802.11ac, for example. Extending the high data-rate capacity of optical fibre transmission to wireless devices, requires greatly increased carrier frequencies. This paper will describe how photonic techniques can enable ultra-high capacity wireless data distribution and transmission using signals at millimetre-wave and TeraHertz (THz) frequencies.

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Section: Coherent Signal Generationmentioning

confidence: 99%

TeraHertz Photonics for Wireless Communications

Seeds

Shams

Fice

et al. 2015

J. Lightwave Technol.

316

120

View full text Add to dashboard Cite

show abstract

“…An optical frequency comb generator (OFCG) is an effective method for generating phase correlated optical tones equally spaced by the driving RF-frequency. Several techniques have been demonstrated to generate optical combs based on modulating the optical carrier using an optical modulator or semiconductor devices [15]- [17]. Two optical tones, spaced by This work is licensed under a Creative Commons Attribution 3.0 License.…”

mentioning

confidence: 99%

Optical Frequency Tuning for Coherent THz Wireless Signals

Shams

Bałakier

Gonzalez-Guerrero

et al. 2018

J. Lightwave Technol.

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THz wireless signals have become of interest for future broadband wireless communication. In a scenario where the wireless signals are distributed to many small remote antenna units, this will require systems which allow flexible frequency tuning of the generated THz carrier. In this paper, we demonstrate experimentally the implementation of two tuning methods using an optical frequency comb generator for coherent optical frequency tuning in THz wireless-over-fiber systems. The first method is based on using a photonic integrated circuit optical phase lock loop (OPLL) subsystem implemented as a high quality optical filter for single comb line selection and optical amplification. The OPLL generates an optical carrier, which is frequency and phase stabilized in reference to one of the optical comb lines with a frequency offset precisely selectable between 4 and 12 GHz. The second method is based on optical single sideband suppressed carrier (SSB-SC) modulation from the filtered comb line using an optical IQ modulator. With this technique, it is possible to suppress the other unwanted optical tones by more than 40 dB. This generated optical carrier is then heterodyned with another filtered optical comb line to generate a tuneable and stable THz carrier. The full system implementations for both methods are demonstrated by transmitting THz wireless signal over fiber with 20 Gb/s data in QPSK modulation. The system performance and the quality of the generated THz carrier are evaluated for both methods at different tuned THz carrier frequencies. The demonstrated methods confirm that a high quality tuneable THz carrier can easily be implemented in systems where dynamic frequency allocation is required.

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