Multiloop optoelectronic oscillator

Yao, X. Steve; Maleki, Lute

doi:10.1109/3.817641

Cited by 415 publications

(166 citation statements)

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“…Tuning of the oscillations frequency is very limited, optomechanical interactions are much weaker than those observed in PCFs or in micro-structured fibers, and the phase noise of the RF output is not as low as those of state-of-the-art OEOs that have been developed over 20 years. 2,3,24 However, the use of GAWBS towards frequency discrimination in OEOs can be regarded as a complementary mechanism, rather than a competing one. Opto-mechanics may be incorporated alongside existing low-phase-noise techniques, 24 such as the use of dual fiber loops, in attempt to enhance performance even further.…”

mentioning

confidence: 99%

“…When the feedback gain is sufficiently high, stable self-sustained RF oscillations may be achieved. OEOs can provide RF tones with extremely low phase noise, 3 and they are pursued for applications in coherent communication, radars, and precision metrology. 4 OEO cavities are typically long and support a large number of longitudinal modes that are separated by a comparatively narrow free spectral range.…”

mentioning

confidence: 99%

“…[1][2][3][4] In a typical arrangement, light from a laser diode source is amplitude-modulated by an RF waveform and propagates along a section of fiber. The light wave is detected at the output of the fiber, and the recovered RF signal is fed back to modulate the optical input.…”

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confidence: 99%

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Electro-opto-mechanical radio-frequency oscillator driven by guided acoustic waves in standard single-mode fiber

2017

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An opto-electronic radio-frequency oscillator that is based on forward scattering by the guided acoustic modes of a standard single-mode optical fiber is proposed and demonstrated.An optical pump wave is used to stimulate narrowband, resonant guided acoustic modes, which introduce phase modulation to a co-propagating optical probe wave. The phase modulation is converted to an intensity signal at the output of a Sagnac interferometer loop.The intensity waveform is detected, amplified and driven back to modulate the optical pump.Oscillations are achieved at a frequency of 319 MHz, which matches the resonance of the acoustic mode that provides the largest phase modulation of the probe wave. Oscillations at the frequencies of competing acoustic modes are suppressed by at least 40 dB. The linewidth of the acoustic resonance is sufficiently narrow to provide oscillations at a single longitudinal mode of the hybrid cavity. Competing longitudinal modes are suppressed by at least 38 dB as well. Unlike other opto-electronic oscillators, no radio-frequency filtering is required within the hybrid cavity. The frequency of oscillations is entirely determined by the fiber optomechanics. Main TextOpto-electronic oscillators (OEOs) are sources of radio-frequency (RF) tones, which combine optical and electrical paths within a closed-loop, hybrid cavity [1][2][3][4].

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Electro-opto-mechanical radio-frequency oscillator driven by guided acoustic waves in standard single-mode fiber

2017

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“…Therefore, very selective RF filters will be required to select only a single oscillating mode. In 2000, dual-cavity OEOs were conceived to alleviate this narrowband RF filter requirement [53]. In essence, a short loop provides the required spectral separation between adjacent oscillating modes while a long loop is responsible for the spectral purity.…”

Section: Multiloop Optoelectronic Oscillation Over a Multicore Fibermentioning

confidence: 99%

“…Multicavity or multiloop optoelectronic oscillators [53][54][55][56][57] can benefit from a reduction of size and weight if the different cores of a multicore fiber act as the required oscillation cavities. In addition, since all the cavities are hosted within the same cladding, this approach provides a fiber integrated medium for enhancing the OEO relative stability against environmental and mechanical fluctuations.…”

Section: Multiloop Optoelectronic Oscillation Over a Multicore Fibermentioning

confidence: 99%

Microwave Signal Processing over Multicore Fiber

et al. 2017

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Abstract:We review the introduction of the space dimension into fiber-based technologies to implement compact and versatile signal processing solutions for microwave and millimeter wave signals. Built upon multicore fiber links and devices, this approach allows the realization of fiber-distributed signal processing in the context of fiber-wireless communications, providing both radiofrequency access distribution and signal processing in the same fiber medium. We present different space-division multiplexing architectures to implement tunable true time delay lines that can be applied to a variety of microwave photonics functionalities, such as signal filtering, radio beamsteering in phased array antennas or optoelectronic oscillation. In particular, this paper gathers our latest work on the following multicore fiber technologies: dispersion-engineered heterogeneous multicore fiber links for distributed tunable true time delay line operation; multicavity devices built upon the selective inscription of gratings in homogenous multicore fibers for compact true time delay line operation; and multicavity optoelectronic oscillation over both homogeneous and heterogeneous multicore fibers.

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Optoelectronic Oscillators

Chi

Lin

2016

Wiley Encyclopedia of Electrical and Electronics Engineering

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Without the need of any clock source, an optoelectronic oscillator (OEO) enables to simultaneously generate a high‐repetition‐rate optical clock/pulse train with low jitter and a microwave clock with high spectral purity, and it can be employed to further perform signal processing including data generation, pulse shaping, and clock recovery. Therefore, it becomes the center of attention in the microwave photonic technical area. Numerous techniques have been proposed to reduce the single‐sideband (SSB) phase noise and to improve the frequency stability of the OEO. In this article, a historical review of OEOs including different constructing methods and functionalities is introduced. Subsequently, a Mach–Zehnder modulator (MZM)‐based OEO at 40 GHz is focused to implement a synthesizer‐free 40 Gbit/s return‐to‐zero binary phase‐shifted‐keying (RZ‐BPSK) data generator. As a result, the 40 GHz microwave clock with a Q ‐factor of up to 2 × 10 8 is observed, and its SSB phase noise can be suppressed to −120 dBc/Hz at 100 kHz frequency offset. Moreover, its spectral quality is almost independent of the intraloop fiber‐induced radio‐frequency (RF) power fading. In addition, the delivered optical RZ carrier with a pulse on/off extinction ratio (ER) of 7.7 dB, a pulse width of 10.5 ps, and a timing jitter of 150 fs is particularly suitable for 40 Gbit/s RZ‐BPSK data transmission. At a requested bit error rate (BER) of 10 −9 , a back‐to‐back receiving power sensitivity of −16.3 dBm is observed, which indicates a power penalty of 4 dB after 25 km single‐mode‐fiber (SMF) transmission.

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Multiloop optoelectronic oscillator

Cited by 415 publications

References 9 publications

Electro-opto-mechanical radio-frequency oscillator driven by guided acoustic waves in standard single-mode fiber

Electro-opto-mechanical radio-frequency oscillator driven by guided acoustic waves in standard single-mode fiber

Microwave Signal Processing over Multicore Fiber

Optoelectronic Oscillators

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