Self-mixing thin-slice solid-state laser Doppler velocimetry with much less than one feedback photon per Doppler cycle

Otsuka, Kenju

doi:10.1364/ol.40.004603

Cited by 28 publications

(11 citation statements)

References 19 publications

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“…The wavelength stability is 2×10 -8 /h and the power stability is 0.1%/2h [32]. Owing to the extremely short photon lifetime compared to the fluorescence lifetime of Nd:YVO4 crystal, the optical rotary sensor using a solid-state microchip laser has a ultrahigh detecting sensitivity (or signal to noise radio, SNR) [33]. Therefore, the proposed ORS can measure different targets with low reflectivity.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

Xu¹,

Dai²,

Wang³

et al. 2021

Preprint

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<div> In this paper, a novel optical rotary sensor based on laser self-mixing interferometry is developed for the full-circle rotation measurement. The proposed sensor is convenient to use for it does not need any contact with the target or a cooperative mirror. A prototype is fabricated and tested. The measured results demonstrate a good performance compared with other optical rotary sensors, in terms of the 0.1 μrad resolution, the 2.33×10-4 linearity and 2 μrad stability over one hour. Additionally, the repeatability error is below 14.66 mrad under 9-group full-circle tests, which exhibits the potential to be instrumentalized reliably. Error analysis and limitation discussion have been also carried out. Although the accuracy needs further improvement compared with the best rotary sensor, this method has its unique advantages of high resolution, non-cooperative target sensing and electromagnetic immunity. Hence, the proposed optical rotary sensor provides a promising alternative in precise rotation measurement, tremor tracing and nano-motion monitoring.</div>In this paper, a novel optical rotary sensor based on laser self-mixing interferometry is developed for the full-circle rotation measurement. The proposed sensor is convenient to use for it does not need any contact with the target or a cooperative mirror. A prototype is fabricated and tested. The measured results demonstrate a good performance compared with other optical rotary sensors, in terms of the 0.1 μrad resolution, the 2.33×10-4 linearity and 2 μrad stability over one hour. Additionally, the repeatability error is below 14.66 mrad under 9-group full-circle tests, which exhibits the potential to be instrumentalized reliably. Error analysis and limitation discussion have been also carried out. Although the accuracy needs further improvement compared with the best rotary sensor, this method has its unique advantages of high resolution, non-cooperative target sensing and electromagnetic immunity. Hence, the proposed optical rotary sensor provides a promising alternative in precise rotation measurement, tremor tracing and nano-motion monitoring.

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Section: Experimental Setup and Resultsmentioning

confidence: 99%

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

Xu¹,

Dai²,

Wang³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The wavelength stability is 2×10 -8 /h and the power stability is 0.1%/2h [26]. Owing to the extremely short photon lifetime compared to the fluorescence lifetime of Nd:YVO4 crystal, the optical rotary sensor using a solid-state microchip laser has a ultrahigh detecting sensitivity (or signal to noise radio, SNR) [27] . Therefore, the proposed ORS can measure different targets with low reflectivity.…”

Section: A Prototypementioning

confidence: 99%

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

Xu¹,

Dai²,

Wang³

et al. 2021

Preprint

View full text Add to dashboard Cite

<div> An optical rotary sensor based on laser self-mixing interferometry is proposed, which enables noncontact and full-circle rotation measurement of non-cooperative targets with high resolution and sensitivity. The prototype demonstrates that the resolution is 0.1μrad and the linearity is 2.33×10-4. Stability of the prototype is 2μrad over 3600s and the repeatability error is below 0.84°under 9-gruop full-circle tests. The theoretical resolution reaches up to 16nrad. Random rotation has been successfully traced with a bionic hand to simulate the tremor process. Error analysis and limitation discussion have been also carried out in the paper. Although the accuracy needs further improvement compared with the best rotary sensor, this method has its unique advantages of non-cooperative target sensing, high sensitivity and electromagnetic immunity. Hence, the optical rotary sensor provides a promising alternative in precise rotation measurement, tremor tracing and nano-motion monitoring. </div>

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“…The laser Doppler velocimeter (LDV) is a well-known equipment used to measure motions, fluid, and airflow [1][2][3][4][5][6]. By illuminating the flow or object with a laser and measuring the scattering caused by movement, it is possible to calculate its speed [7,8]. LDV is capable of providing high spatial resolution and high response speed and is characterized by non-contact measurement.…”

Section: Introductionmentioning

confidence: 99%

A Traceable High-Accuracy Velocity Measurement by Electro-Optic Dual-Comb Interferometry

et al. 2019

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An electro-optic dual-comb Doppler velocimeter for high-accuracy velocity measurement is presented in this paper. The velocity information of the object can be accurately extracted from the change of repetition frequency, which is in the microwave frequency domain and can be locked to an atomic clock. We generate two optical combs by electro-optic phase modulators and trace their repetition frequencies to the rubidium clock. One functions as the measurement laser and the other the reference. Experimentally, we verify its high accuracy in the range of 100–300 mm/s with a maximum deviation of 0.44 mm/s. The proposed velocimeter combines the merits of high accuracy and wide range. In addition, since the repetition frequency used for the measurement is traceable to the rubidium clock, its potential superiority in traceability can be utilized in velocity metrology.

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Self-mixing thin-slice solid-state laser Doppler velocimetry with much less than one feedback photon per Doppler cycle

Cited by 28 publications

References 19 publications

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

A Traceable High-Accuracy Velocity Measurement by Electro-Optic Dual-Comb Interferometry

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