Phase-Locked Synthetic Wavelength Interferometer Using a Femtosecond Laser for Absolute Distance Measurement without Cyclic Error [PDF]
Sensors, 2023 We present a phase-locked synthetic wavelength interferometer that enables a complete elimination of cyclic errors in absolute distance measurements. With this method, the phase difference between the reference and measurement paths is fed back into a ...
Hyeokin Kang +3 more
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Real-Time and Meter-Scale Absolute Distance Measurement by Frequency-Comb-Referenced Multi-Wavelength Interferometry [PDF]
Sensors, 2018 We report on a frequency-comb-referenced absolute interferometer which instantly measures long distance by integrating multi-wavelength interferometry with direct synthetic wavelength interferometry.
Guochao Wang, Lilong Tan, Shuhua Yan
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High-Update-Rate (25 kHz) Laser Ranging with Random Noise Modulation for Fast and Precise Absolute Distance Measurement [PDF]
SensorsThis paper proposes a technique for precise distance measurement under laser random noise using autocorrelation demodulation. We conducted measurements within a 2 m range using a commercial digitizer with a sampling rate of 40 GS/s.
Yongchao Chen +15 more
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Multi-Wavelength Interferometric Absolute Distance Measurement and Dynamic Demodulation Error Compensation [PDF]
SensorsThis paper presents an absolute distance measurement system based on three-wavelength synchronous phase-shifting interferometry. A synthetic wavelength chain is established using three semiconductor lasers in an all-fiber Fizeau interferometer.
Jiawang Fang +3 more
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A Micro Absolute Distance Measurement Method Based on Dispersion Compensated Polarized Low-Coherence Interferometry [PDF]
Sensors, 2020 Micro absolute distance measurement (MADM) is widely used in industrial and military fields. To achieve high accuracy and frequency response, a polarized low-coherence interferometry (PLCI)-based method for MADM is proposed.
Xun Sun +5 more
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An Interferometric Multi-Sensor Absolute Distance Measurement System for Use in Harsh Environments [PDF]
SensorsFourier transform-based frequency sweeping interferometry (FT-FSI) is an interferometric technique that enables absolute distance measurement by detecting the beat frequencies from the interference of reflected signals.
Mateusz Sosin +7 more
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1.79-GHz acquisition rate absolute distance measurement with lithium niobate electro-optic comb [PDF]
Nature CommunicationsAI-empowered autonomous vehicles must sense the fast-changing three-dimensional environments with high speed and precision. However, the tradeoff between acquisition rate and non-ambiguity range prevents most LiDARs from achieving high-speed absolute ...
Yifan Qi +7 more
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Impact of Cyclic Error on Absolute Distance Measurement Based on Optical Frequency Combs [PDF]
SensorsAbsolute distance measurements based on optical frequency combs (OFCs) have greatly promoted advances in both science and technology, owing to the high precision, large non-ambiguity range (NAR), and a high update rate.
Runmin Li +5 more
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High-Stable RF-Frequency Generation Using a Microcontroller for Amplitude Modulation Based Absolute Distance Measurement [PDF]
한국정밀공학회지, 2019 In this paper, we describe high-stable RF-frequency generation using a low-cost 8-bit microcontroller for amplitude-modulation based distance measurement, which is one of the indispensable technologies for cost-effective Lidar application.
Yeongjin Yu, Joohyung Lee
doaj +1 more source
Applied Sciences, 2020 We report an absolute interferometer configured with a 1 GHz microwave source photonically synthesized from a fiber mode-locked laser of a 100 MHz pulse repetition rate.
Wooram Kim +5 more
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