A Self-Synchronized Optoelectronic Oscillator Based on an RTD Photodetector and a Laser Diode

Romeira, Bruno; Seunarine, K.; Ironside, C. N.; Kelly, Anthony E.; Figueiredo, J. M. L.

doi:10.1109/lpt.2011.2154320

Cited by 23 publications

(8 citation statements)

References 12 publications

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“…Alternatively, an optoelectronic oscillator can generate photonic microwave signals with excellent frequency stability through attaining a high quality factor using a very long fiber loop, where spurious noise at the reciprocal of the round-trip time can be further suppressed using multiple loops [6]. Signal injection into a fiber laser or a semiconductor laser can also increase the microwave modulation depth [7][8][9]. However, the construction of an optoelectronic oscillator often requires high-frequency components, such as microwave filters, microwave amplifiers, photodetectors (PDs), and optical modulators.…”

mentioning

confidence: 99%

Tunable photonic microwave generation using optically injected semiconductor laser dynamics with optical feedback stabilization

2013

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The period-one (P1) nonlinear dynamics of a semiconductor laser subject to both optical injection and optical feedback are investigated for photonic microwave generation. The optical injection first drives the laser into P1 dynamics so that its intensity oscillates at a microwave frequency. A dual-loop optical feedback then stabilizes the fluctuations of the oscillation frequency. Photonic generation at 45.424 GHz is demonstrated with a linewidth below 50 kHz using a laser with a relaxation resonance frequency of only 7 GHz. The dual-loop feedback effectively narrows the linewidth by over an order of magnitude, reduces the phase noise variance by more than 500 times, and suppresses side peaks in the power spectrum.

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confidence: 99%

Tunable photonic microwave generation using optically injected semiconductor laser dynamics with optical feedback stabilization

2013

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“…The orientation of the RTD's optical waveguide was taken into account in the layout and in the chip bonding to PCB to ensure good alignment to an optical fiber. In the oscillator circuit, a 10 Ω thin-film resistor, Figure 5, was utilized as part of the bias circuit of the oscillator to suppress the bias circuit spurious oscillations for the RF signals generated by the RTD [14]. The operation frequency of the RTD-PD is essentially determined by the RTD-PD's parallel capacitance and the series equivalent inductance of the wire bonding connections (the wire length was around 4 mm, giving an equivalent inductance around 3.6 nH), which for the circuit reported here gives an operation frequency up to 1.4 GHz.…”

Section: Regimes Of Operation Of Dbqw Rtd Photo-detectorsmentioning

confidence: 99%

“…Recently, optical injection locking of double barrier quantum well (DBQW) resonant tunneling diode (RTD) photo-detector devices to intensity modulated optical signals [12,13], and self-injection locking of a low cost, simple and compact RTD optoelectronic oscillator (OEO) configuration [14,15] have been successfully demonstrated that could substantially increase the practicality of optically controlled microwave oscillators for a wider range of microwave and photonics applications. In this article, DBQW-RTD based optical waveguide photo-detectors are described for the implementation of novel optically injection locked microwave oscillators that are controlled using signals at telecommunications wavelengths for applications in clock recovery and fiber optic based communication systems.…”

Section: Introductionmentioning

confidence: 99%

Photo-Detectors Integrated with Resonant Tunneling Diodes

Romeira

Pessoa

Salgado

et al. 2013

Sensors

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We report on photo-detectors consisting of an optical waveguide that incorporates a resonant tunneling diode (RTD). Operating at wavelengths around 1.55 μm in the optical communications C band we achieve maximum sensitivities of around 0.29 A/W which is dependent on the bias voltage. This is due to the nature of RTD nonlinear current-voltage characteristic that has a negative differential resistance (NDR) region. The resonant tunneling diode photo-detector (RTD-PD) can be operated in either non-oscillating or oscillating regimes depending on the bias voltage quiescent point. The oscillating regime is apparent when the RTD-PD is biased in the NDR region giving rise to electrical gain and microwave self-sustained oscillations Taking advantage of the RTD's NDR distinctive characteristics, we demonstrate efficient detection of gigahertz (GHz) modulated optical carriers and optical control of a RTD GHz oscillator. RTD-PD based devices can have applications in generation and optical control of GHz low-phase noise oscillators, clock recovery systems, and fiber optic enabled radio frequency communication systems.

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“…2, the system operates as a high-frequency nonlinear self-sustained oscillator 50 . In this situation, the quality of the high-speed radio-frequency signals can benefit from the effect of the delayed optoelectronic feedback 51,52 , enabling ultra-low phase noise self-sustained oscillations.…”

Section: Introductionmentioning

confidence: 99%

Delay dynamics of neuromorphic optoelectronic nanoscale resonators: Perspectives and applications

Romeira

Figueiredo

Javaloyes

2017

Chaos: An Interdisciplinary Journal of Nonlinear Science

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With the recent exponential growth of applications using artificial intelligence (AI), the development of efficient and ultrafast brain-like (neuromorphic) systems is crucial for future information and communication technologies. While the implementation of AI systems using computer algorithms of neural networks is emerging rapidly, scientists are just taking the very first steps in the development of the hardware elements of an artificial brain, specifically neuromorphic microchips. In this review article, we present the current state of the art of neuromorphic photonic circuits based on solid-state optoelectronic oscillators formed by nanoscale double barrier quantum well resonant tunneling diodes. We address, both experimentally and theoretically, the key dynamic properties of recently developed artificial solid-state neuron microchips with delayed perturbations and describe their role in the study of neural activity and regenerative memory. This review covers our recent research work on excitable and delay dynamic characteristics of both single and autaptic (delayed) artificial neurons including all-or-none response, spike-based data encoding, storage, signal regeneration and signal healing. Furthermore, the neural responses of these neuromorphic microchips display all the signatures of extended spatio-temporal localized structures (LSs) of light, which are reviewed here in detail. By taking advantage of the dissipative nature of LSs, we demonstrate potential applications in optical data reconfiguration and clock and timing at high-speeds and with short transients. The results reviewed in this article are a key enabler for the development of high-performance optoelectronic devices in future high-speed brain-inspired optical memories and neuromorphic computing.

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A Self-Synchronized Optoelectronic Oscillator Based on an RTD Photodetector and a Laser Diode

Cited by 23 publications

References 12 publications

Tunable photonic microwave generation using optically injected semiconductor laser dynamics with optical feedback stabilization

Tunable photonic microwave generation using optically injected semiconductor laser dynamics with optical feedback stabilization

Photo-Detectors Integrated with Resonant Tunneling Diodes

Delay dynamics of neuromorphic optoelectronic nanoscale resonators: Perspectives and applications

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