High-precision absolute length metrology using fiber-based optical frequency combs

Minoshima, Kaoru

doi:10.1109/iceaa.2010.5650676

Cited by 13 publications

(6 citation statements)

References 4 publications

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“…After years of development, significant progress has been made in the implementation of Er-doped fiber combs based on these mode-locking principles. Meanwhile, Er-doped fiber combs have also promoted progress in many fields [7,17,49].…”

Section: Principle Of Optical Frequency Combsmentioning

confidence: 99%

Recent Advances, Applications, and Perspectives in Erbium-Doped Fiber Combs

Yan,

Xu,

et al. 2024

Photonics

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Optical frequency combs have emerged as a new generation of metrological tools, driving advancements in various fields such as free-space two-way time–frequency transfer, low-noise microwave source generation, and gas molecule detection. Among them, fiber combs based on erbium-doped fiber mode-locked lasers have garnered significant attention due to their numerous advantages, including low noise, high system integration, and cost-effectiveness. In this review, we discuss recent developments in erbium-doped fiber combs and analyze the advantages and disadvantages of constructing fiber combs utilizing different erbium-doped mode-locked fiber lasers. First, we provide a brief introduction to the basic principles of optical frequency combs. Then, we explore erbium-doped fiber combs implemented utilizing various mode-locking techniques, such as nonlinear polarization rotation (NPR), real saturable absorber (SA), and nonlinear amplifying loop mirror (NALM). Finally, we present an outlook on the future perspectives of erbium-doped fiber combs.

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Section: Principle Of Optical Frequency Combsmentioning

confidence: 99%

Recent Advances, Applications, and Perspectives in Erbium-Doped Fiber Combs

Yan,

Xu,

et al. 2024

Photonics

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“…Absolute distance measurement was introduced with the development of a femtosecond laser to measure the distance instantaneously. Absolute distance measurements can be achieved using diverse optical techniques, such as synthetic wavelength interferometry, [5][6][7][8] multi-wavelength interferometry, [9][10][11][12][13][14][15] spectrally resolved interferometry, [16][17][18][19][20] dualcomb interferometry, [21][22][23][24][25] and time-of-flight. [25][26][27][28][29][30][31][32][33][34][35] These metrology systems have high precision and linearity and are applicable to various fields, such as high-precision machinery engineering and next-generation space missions.…”

Section: Introductionmentioning

confidence: 99%

Dual-comb-based multi-axis time-of-flight measurement via high-efficiency optical cross-correlation in a semiconductor optical amplifier

Jang,

Kim,

Kim

2023

APL Photonics

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Absolute distance measurement for multiple targets is required in industrial and scientific fields such as machine monitoring, detection of distortion in large structures, wafer alignment in semiconductor manufacturing, and the formation flying of satellites. Furthermore, the expansion of measurement channels is essential for the effective application of multi-target measurement. However, because measurement channels' expansion requires high power, it is difficult due to the low conversion efficiency of conventional systems that use a non-linear crystal for optical cross-correlation. In this study, for measurement channel expansion, time-of-flight based absolute laser ranging via high-efficiency dual-comb cross-correlation using a semiconductor optical amplifier is developed. The semiconductor optical amplifier acts as a cross-correlator, and it can produce a cross-correlation signal with a laser’s power of 50 µW because of its very high conversion efficiency. This method is suitable for expanding the measurement channels and measuring non-cooperative targets as it can detect low-power signals. The repeatability of the distance measurement is 4 µm at a single shot (37 µs) and 120 nm for 5 ms. The linearity is assessed by evaluating the R-square, which is equal to 1 within the range of significant figures. Moreover, the distance measurement of targets lying on the two axes was demonstrated to ensure the measurement channels' expansion. This measurement system has the potential to determine multiple distances, making it applicable to diverse fields such as semiconductor manufacturing, smart factories, plant engineering, and satellite formation flying.

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“…Meanwhile, along with the optical frequency comb made available in recent years with the development of mode-locked ultrashort lasers, several new comb-based principles have been proposed to extend the measurable range with enhanced resolutions by advancing the principles of phase-measuring interferometry [5]. First, synthetic wavelength interferometry (SWI) creates artificial microwaves by beating separate comb modes to handle several meters with micrometer-level resolutions [6][7][8][9][10][11][12]. Second, multiple-wavelength interferometry (MWI) employs multiple comb modes simultaneously to deal with a distance of several meters with a fine resolution in the sub-wavelength regime [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Open-Air Testing of Dual-Comb Time-of-Flight Measurement

Kim,

Yang,

Jang

et al. 2023

Sensors

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We configured a long-distance ranging apparatus to test the principle of dual-comb time-of-flight measurement using ultrashort lasers. Emphasis was given to the evaluation of open-air performance quantitatively in terms of the measurement resolution and stability. The test results revealed that our dual-comb asynchronous optical pulse sampling permits micrometer-resolved ranging with a repeatability of 2.05 μm over a 648 m distance in dry weather conditions. Further atmospheric effects were evaluated in three different weather conditions with corresponding Allan deviations. Finally, the capability of simultaneous determination of multiple targets was verified with the potential of advanced industrial applications, such as manufacturing, surveying, metrology, and geodesy.

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High-precision absolute length metrology using fiber-based optical frequency combs

Cited by 13 publications

References 4 publications

Recent Advances, Applications, and Perspectives in Erbium-Doped Fiber Combs

Recent Advances, Applications, and Perspectives in Erbium-Doped Fiber Combs

Dual-comb-based multi-axis time-of-flight measurement via high-efficiency optical cross-correlation in a semiconductor optical amplifier

Open-Air Testing of Dual-Comb Time-of-Flight Measurement

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