Heterodyne multi-wavelength absolute interferometry based on a cavity-enhanced electro-optic frequency comb pair

Yang, Ruitao; Pollinger, Florian; Meiners-Hagen, Karl; Tan, Jiubin; Bosse, Harald

doi:10.1364/ol.39.005834

Cited by 62 publications

(20 citation statements)

References 23 publications

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“…This feature ensures a high degree of mutual coherence without resorting to sophisticated phaselocking schemes [17][18][19]. Beyond spectroscopy, electro-optic dual-comb interferometers have been applied to optical waveform characterization [20,21], laser ranging [22] and vibrometry [23,24]. However, despite the above advantages, electro-optic FCs suffer from a relatively low number of teeth (typically <100).…”

Section: Introductionmentioning

confidence: 99%

Coherent multi-heterodyne spectroscopy using acousto-optic frequency combs

Durán¹,

Schnébelin²,

Chatellus³

2018

Opt. Express

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We propose and characterize experimentally a new source of optical frequency combs for performing multi-heterodyne spectrometry. This comb modality is based on a frequency-shifting loop seeded with a continuous-wave (CW) monochromatic laser. The comb lines are generated by successive passes of the CW laser through an acousto-optic frequency shifter. We report the generation of frequency combs with more than 1500 mutually coherent lines, without resorting to non-linear broadening phenomena or external electronic modulation. The comb line spacing is easily reconfigurable from tens of MHz down to the kHz region. We first use a single acousto-optic frequency comb to conduct self-heterodyne interferometry with a high frequency resolution (500 kHz). By increasing the line spacing to 80 MHz, we demonstrate molecular spectroscopy on the sub-millisecond time scale. In order to reduce the detection bandwidth, we subsequently implement an acousto-optic dual-comb spectrometer with the aid of two mutually coherent frequency shifting loops. In each architecture, the potentiality of acousto-optic frequency combs for spectroscopy is validated by spectral measurements of hydrogen cyanide in the near-infrared region.

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Section: Introductionmentioning

confidence: 99%

Coherent multi-heterodyne spectroscopy using acousto-optic frequency combs

Durán¹,

Schnébelin²,

Chatellus³

2018

Opt. Express

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“…The application of dual-combs with slightly different repetition rates has enabled a revolutionary new technique for the field of detection and metrology, e.g., laser ranging [1][2][3][4], velocity measurement [5] and precision spectroscopy [6][7][8]. By using the dual-comb-based multi-heterodyne detection technique, temporal and spectral information can be extracted with a high resolution and high update-rate simultaneously.…”

Section: Introductionmentioning

confidence: 99%

A Multidimensional Multiplexing Mode-Locked Laser Based on a Dual-Ring Integrative Structure for Tri-Comb Generation

Yang

Sun

et al. 2020

Applied Sciences

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The tri-comb-based multi-heterodyne detection technique has been proven to be a powerful tool for precision metrology, e.g., laser ranging and spectroscopy. However, in existing tri-comb generation methods, it is difficult to provide a large and variable difference in tri-comb repetition rates. In this paper; we propose a multidimensional multiplexing mode-locked laser based on a dual-ring integrative structure. Combining the dimensions of sub-ring multiplexing and wavelength multiplexing, two modes of tri-comb generation can be achieved with the dual-ring single cavity laser. The generated combs are identified based on the relative intensity of the pulse trains and optical spectrum, and the repetition rates of dual-combs from the same sub-ring are distinguished based on dispersion analysis. With repetition rates of approximately 47 MHz and 49.6 MHz, the minimum and maximum repetition rate difference of the generated tri-comb can be changed from 2.38 kHz and 2.59526 MHz to 2.74 kHz and 2.59720 MHz merely by switching the operation mode of the dual-ring integrated mode-locked laser. The obtained results indicate that our method can offer a powerful scheme for future multi-comb generation and its application in multi-heterodyne detection-based laser ranging and spectroscopy.

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“…In the year 2000, Minoshima and Matsumoto proposed the first absolute distance measurement system based on frequency combs [4], and performed a very accurate measurement of a long distance. Subsequently, several novel geometric measurement methods were published, including time of flight [5], dispersive interferometry [6], [7], multi-heterodyne interferometry [8], [9], and pulse cross-correlation [10], [11]. Dispersive interferometry was proposed by Ki-Nam Joo and Seung-Woo Kim in 2006, and, although it is very stable, it is difficult to perform arbitrary, long-distance measurements.…”

Section: Introductionmentioning

confidence: 99%

Absolute Angle and Glass Thickness Measurement Based on Dispersive Interferometry

Peng

Zhang

et al. 2019

IEEE Photon. Technol. Lett.

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Method to accurately measure both refractive index and the thickness of glass is investigated. The method combines equal inclination interference with dispersive interferometry. The interference signal, which is detected by the spectrometer, contains different frequencies and can be demodulated with high accuracy. The experiments indicate that the standard deviation of the thickness is better than the 35 nm, while the standard deviation of the measured refractive indices is below 5.76 × 10 −6. Furthermore, absolute angles, between 0 • and 51 • , can be measured with a repeatability within 5 .

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Heterodyne multi-wavelength absolute interferometry based on a cavity-enhanced electro-optic frequency comb pair

Cited by 62 publications

References 23 publications

Coherent multi-heterodyne spectroscopy using acousto-optic frequency combs

Coherent multi-heterodyne spectroscopy using acousto-optic frequency combs

A Multidimensional Multiplexing Mode-Locked Laser Based on a Dual-Ring Integrative Structure for Tri-Comb Generation

Absolute Angle and Glass Thickness Measurement Based on Dispersive Interferometry

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