Deviation-free Bragg cell frequency-shifting

Abbiss, J. B.; Mayo, W.

doi:10.1364/ao.20.000588

Cited by 14 publications

(3 citation statements)

References 4 publications

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“…However, it is generally challenging for fabricating a single acousto-optic modulator (AOM) through the frequency shift of several hundred kHz. The traditional bulk AOMs like Bragg cell [129] and integrated structure [130], demand precise alignment and high diffraction efficiency. Besides, the performance of these methods for heterodyne detection is restricted by the signal-to-signal beating interference (SSBI) [131].…”

Section: Low-frequency Shifter Based On Aomc For Microvibration Hetermentioning

confidence: 99%

Recent progress of dynamic mode manipulation via acousto-optic interactions in few-mode fiber lasers: mechanism, device and applications

Shi

et al. 2020

Nanophotonics

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The burgeoning advances of spatial mode conversion in few-mode fibers emerge as the investigative hotspot in novel structured light manipulation, in that, high-order modes possess a novel fundamental signature of various intensity profiles and unique polarization distributions, especially orbital angular momentum modes carrying with phase singularity and spiral wave front. Thus, control of spatial mode generation becomes a crucial technique especially in fiber optics, which has been exploited to high capacity space division multiplexing. The acousto-optic interactions in few-mode fibers provide a potential solution to tackle the bottleneck of traditional spatial mode conversion devices. Acousto-optic mode conversion controlled by microwave signals brings tremendous new opportunities in spatial mode generation with fast mode tuning and dynamic switching capabilities. Besides, dynamic mode switching induced by acousto-optic effects contributes an energy modulation inside a laser cavity through nonlinear effects of multi-mode interaction, competition, which endows the fiber laser with new functions and leads to the exploration of new physical mechanism. In this review, we present the recent advances of controlling mode switch and generation employing acousto-optic interactions in few-mode fibers, which includes acousto-optic mechanisms, optical field manipulating devices and novel applications of spatial mode control especially in high-order mode fiber lasers.

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Section: Low-frequency Shifter Based On Aomc For Microvibration Hetermentioning

confidence: 99%

Recent progress of dynamic mode manipulation via acousto-optic interactions in few-mode fiber lasers: mechanism, device and applications

Shi

et al. 2020

Nanophotonics

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“…The key part of an optical heterodyne detection configuration is a frequency shifter to generate a frequency-shifted light and then form a carrier signal with high signal-to-noise ratio (SNR). To date, many optical elements, such as bulk-optic Bragg cells and integrated optical waveguides [7][8][9][10], have been used as frequency shifters. However, these optical elements need precise optical alignment.…”

Section: Introductionmentioning

confidence: 99%

Optical Heterodyne Microvibration Detection Based on All-Fiber Acousto-Optic Superlattice Modulation

Zhang

Chen

Jiang

et al. 2017

J. Lightwave Technol.

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We propose a configuration of optical heterodyne micro-vibration detection based on an all-fiber acousto-optic superlattice modulation structure that acts as both frequency shifter and reflector, simultaneously. The vibration information within the frequency range between 1 Hz to 150 kHz of a piezoelectric mirror (PZM) has been experimentally measured by using this all-fiber optical heterodyne detection configuration. The minimal measurable vibration amplitude and the resolution are around 0.013 nm and 10 pm in the region of tens to hundreds of kilohertz, respectively. The configuration not only has advantages of compact size, easy alignment and non-contact measurement, but also gains high accuracy, which provides a promising alternative and could be applied in the compact and portable instruments based on optical heterodyne detection.Index Terms-optical heterodyne detection, acousto-optic superlattice modulation, acousto-optic frequency shifter, micro-vibration.

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“…Abgesehen von den damit verbundenen thermischen Nachteilen müssen diese Bragg-Zellen in den optischen Strahlengang einer Freistrahlanordnung eingefügt werden. Sie weisen einen frequenzabhängigen Ablenkwinkel auf, was Justageprobleme aufwerfen kann und die Ursache für eine unerwünschte parasitäre Amphtudenmodulation ist[18].Die Erzeugung einer kohärenten Frequenzverschiebung unter Nutzung des Brillouin-Effekts in faserintegrierter Bauweise umgeht diese Probleme. Am Beispiel einer faserintegrierten Konfiguration eines Laser-Doppler-Zweistrahlsystems ist in Bild 12 diese Alternative skizziert.…”

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Sensoren mit frequenzanaloger Signalwandlung auf der Basis stimulierter Brillouin-Streuung in Lichtleitfasern / Sensors with frequency Output based upon stimulated Brillouin-scattering in optical fibres

Bernard¹

1992

tm - Technisches Messen

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Schlagwörter: Sensoren, Brillouin-Streuung, Lichtleitfasern, frequenzanaloges Ausgangssignal, Stokeswelle, Brillouin-Laser Stimulierte Brillouin-Streuung (SBS) ist ein nichtlinearer Effekt in optischen Glasfasern, der durch die Wechselwirkung elektromagnetischer Lichtwellen mit den Gitterschwingungen des Festkörpers entstehen kann. Dabei bildet sich eine kohärente rückgestreute Stokeswelle, die gegenüber der eingestrahlten Frequenz der Pumpwelle um einige Gigahertz rotverschoben ist. Bei entsprechender Dimensionierung der Wechselwirkungsparameter tritt SBS bereits bei Pumpschwellen im Sub-Milliwatt-Bereich auf. So störend dieser Effekt für die optische Nachrichtenübertra-gung mittels Glasfasern ist, so interessant ist er für die optische Sensorik, da er die inhärente Konversion physikalischer Größen in eine Signalfrequenz liefert. Stimulated Brillouin Scattering (SBS) is a nonlinear effect in optical fibres, which can be generated by interaction of electromagnetic light waves and acoustic phonons in the glass material. As a consequence a coherently backscattered stokeswave builds up with an emission frequency, which is red-shifted by a few GHz compared to the pump frequency. Suitably configuring the interaction parameters allows for pump thresholds in the microwatt region.Although the phenomenon is considered as potentially perturbing in fibre optic communication systems, it is of interest for fibre optic sensors, which, as an inherent feature, convert the physical measurement value in a frequency Signal.

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Deviation-free Bragg cell frequency-shifting

Cited by 14 publications

References 4 publications

Recent progress of dynamic mode manipulation via acousto-optic interactions in few-mode fiber lasers: mechanism, device and applications

Recent progress of dynamic mode manipulation via acousto-optic interactions in few-mode fiber lasers: mechanism, device and applications

Optical Heterodyne Microvibration Detection Based on All-Fiber Acousto-Optic Superlattice Modulation

Sensoren mit frequenzanaloger Signalwandlung auf der Basis stimulierter Brillouin-Streuung in Lichtleitfasern / Sensors with frequency Output based upon stimulated Brillouin-scattering in optical fibres

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