High-accuracy long distance measurements with a mode-filtered frequency comb

Lešundák, Adam; Voigt, D.; Berg, Steven van den

doi:10.1364/oe.25.032570

Cited by 20 publications

(10 citation statements)

References 28 publications

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“…Another easy improvement can be increasing the repetition frequency. As shown in [24], with a laser of tens of gigahertz repetition frequency a highly accurate result can be also obtained.…”

Section: Distance Measurement For Short Distancementioning

confidence: 92%

“…This laser features a repetition rate of 2.5 GHz, which ensures that the modes can be separated by most VIPA (Virtually Imaged Phased Array) spectrometers. Compared to other spectral interferometry methods [18], [24], the phase calculation method with Hilbert transform can extract phase directly and accurately, which can improve fitting results. The performance of distance measurement and repetition frequency tuning are also shown.…”

Section: Introductionmentioning

confidence: 99%

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Distance Metrology With Integrated Mode-Locked Ring Laser

et al. 2019

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The measurement of distance plays an integral part in many aspects of modern societies. In this paper an integrated mode-locked laser on a chip is used for distance measurement based on mode-resolved interferometry. The emission from the on-chip source with a repetition rate of 2.5 GHz and a spectral bandwidth of 3 nm is coupled into a Michelson interferometer. The interferometer output is recorded as a spectral interferogram, which is captured in a single camera image. The images are analyzed using Hilbert transform to extract the distance. The distance derived shows a deviation of 6 μm from the reference, for a distance up to 25 mm. We also demonstrate interferometry with repetition frequency sweep which can also be used with the source. Performance is expected to be better in the near future with the rapid developments in the field of on-chip laser sources which are demonstrating larger spectral widths and coherence lengths.

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Section: Distance Measurement For Short Distancementioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Distance Metrology With Integrated Mode-Locked Ring Laser

et al. 2019

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“…Vernier filtering has been exploited in numerous applications other than molecular spectroscopy, ranging from astrocombs [35][36][37][38][39] to long-distance measurements [40] and temperature sensing [41], and listing all of them is beyond the scope of this review. Below we mention two works that utilize not only the passive cavity filtering, but also the tunability offered by the Vernier filtering.…”

Section: Other Applications Employing Vernier Filteringmentioning

confidence: 99%

Cavity-Enhanced Frequency Comb Vernier Spectroscopy

et al. 2022

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Vernier spectroscopy is a frequency comb-based technique employing optical cavities for filtering of the comb and for enhancement of the interaction length with the sample. Depending on the ratio of the cavity free spectral range and the comb repetition rate, the cavity transmits either widely spaced individual comb lines (comb-resolved Vernier spectroscopy) or groups of comb lines, called Vernier orders (continuous-filtering Vernier spectroscopy, CF-VS). The cavity filtering enables the use of low-resolution spectrometers to resolve the individual comb lines or Vernier orders. Vernier spectroscopy has been implemented using various near- and mid-infrared comb sources for applications ranging from trace gas detection to precision spectroscopy. Here, we present the principles of the technique and provide a review of previous demonstrations of comb-resolved and continuous-filtering Vernier spectroscopy. We also demonstrate two new implementations of CF-VS: one in the mid-infrared, based on a difference frequency generation comb source, with a new and more robust detection system design, and the other in the near-infrared, based on a Ti:sapphire laser, reaching high sensitivity and the fundamental resolution limit of the technique.

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“…The OFC is characterized by an ultrashort pulse sequence with an extremely stable pulse spacing in the time domain and numerous discrete, uniform, and traceable optical spectral lines in the wide spectrum in the frequency domain. Based on its unique time-frequency characteristics, in the past 20 years, various absolute distance measurement methods have been developed, such as pulse alignment interference [10], inter-mode beat interference [11], dispersive interference [12][13][14], and dual-comb interference [15]. A unique advantage appears when the OFC absolute distance measurement is used for multichannel expansion.…”

Section: Introductionmentioning

confidence: 99%

Optical Frequency Comb Frequency-division Multiplexing Dispersive Interference Multichannel Distance Measurement

Lin

et al. 2023

Nanomanuf Metrol

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An optical frequency comb (OFC) frequency-division multiplexing dispersive interference multichannel distance measurement method is proposed. Based on the OFC dispersive interference, the wide OFC spectrum is divided into multiple channels using a wavelength-division multiplexer. Under the existing light source and spectrometer, a single interference system can realize six channels of the high-precision parallel absolute distance measurement. The influence of the spectrum width and shape on the performance of the distance measurement channel is analyzed. The ranging accuracy of six channels is higher than ± 4 μm under the optimization of a nonuniform discrete Fourier transform and Hanning window.

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High-accuracy long distance measurements with a mode-filtered frequency comb

Cited by 20 publications

References 28 publications

Distance Metrology With Integrated Mode-Locked Ring Laser

Distance Metrology With Integrated Mode-Locked Ring Laser

Cavity-Enhanced Frequency Comb Vernier Spectroscopy

Optical Frequency Comb Frequency-division Multiplexing Dispersive Interference Multichannel Distance Measurement

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