Frequency scanning interferometry with nanometer precision using a vertical-cavity surface-emitting laser diode under scanning speed control

Kakuma, Seiichi

doi:10.1007/s10043-015-0140-3

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…Within a range of 1.5 m, the distance resolution reached up to 31 μm. In 2015, Kakuma et al [ 16 ] stabilized the sweep speed of the light source using a circuit controller based on a phase-locked loop technology. They marked the frequency using a rubidium gas cell (Rb-cell) and achieved a sub-micrometer measurement accuracy within a 14 mm measurement range, with a measurement standard deviation of 0.12 μm.…”

Section: Introductionmentioning

confidence: 99%

Research on Fiber-Optic Optical Coherence Ranging System Based on Laser Frequency Scanning Interferometry

Zhou,

Yuan,

2024

Sensors

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In this paper, a system for absolute distance measurement is proposed based on laser frequency scanning interferometry (FSI). The system utilizes a digitally tunable laser as the light source and employs synchronized pulses to drive an analog-to-digital converter (ADC) for interference signal acquisition. The frequency domain demodulation for absolute distance measurement is achieved through a three-spectrum line interpolation method based on the Hanning window. The system takes advantage of the spatial filtering characteristics of a single-mode optical fiber and the diffuse reflection properties of light to achieve a high integration of the prism system that forms the interference optical path. The resulting integrated fiber-optic probe is capable of measuring the distance to a non-cooperative target even when oriented at a certain angle with the target. We designed and fabricated a portable prototype. Experimental validation demonstrated that the maximum measurement distance of the system is 73.51 mm with a standard deviation of less than 0.19 μm for optimal measurement results. Even when there is an offset angle, the system maintains good measurement repeatability.

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Section: Introductionmentioning

confidence: 99%

Research on Fiber-Optic Optical Coherence Ranging System Based on Laser Frequency Scanning Interferometry

Zhou,

Yuan,

2024

Sensors

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“…The current-induced frequency modulation noise was reduced two orders of magnitude. Kakuma [18] marked the sweeping frequency of the laser with the special absorption frequency of the Rb cell. The gradient of interference fringes was accurately determined by the linear least square fitting method.…”

Section: Introductionmentioning

confidence: 99%

Phase Unwrapping and Frequency Points Subdivision of the Frequency Sweeping Interferometry Based Absolute Ranging System

Song

Shi

Liu

et al. 2022

Sensors

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Frequency sweeping interferometry (FSI) based absolute distance ranging has high precision and no ranging blind area. It can be used to realize large-scale and non-cooperative target measurement. However, the nonlinear frequency modulation of the laser seriously affects the ranging accuracy. In this manuscript, a measurement method assisted by Hilbert Transform (HT) and Chirp-z Transform (CZT) is proposed, which can realize the phase unwrapping of the beat signal, the length reduction in the delay fiber of auxiliary optical path, and the improvement of the frequency resolution. The narrow-band frequency suitable for HT is further studied. In the experiment, the ranging resolution is 70 μm and the standard deviation is 12.6 μm within a distance of 4005 mm.

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Frequency-modulated continuous-wave laser radar using dual vertical-cavity surface-emitting laser diodes for real-time measurements of distance and radial velocity

Kakuma

2016

Opt Rev

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Frequency scanning interferometry with nanometer precision using a vertical-cavity surface-emitting laser diode under scanning speed control

Cited by 7 publications

References 17 publications

Research on Fiber-Optic Optical Coherence Ranging System Based on Laser Frequency Scanning Interferometry

Research on Fiber-Optic Optical Coherence Ranging System Based on Laser Frequency Scanning Interferometry

Phase Unwrapping and Frequency Points Subdivision of the Frequency Sweeping Interferometry Based Absolute Ranging System

Frequency-modulated continuous-wave laser radar using dual vertical-cavity surface-emitting laser diodes for real-time measurements of distance and radial velocity

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