HIGH RESOLUTION DIRECT FREQUENCY COMB SPECTROSCOPY OF VINYL BROMIDE (C2H3Br) AND NITROMETHANE (CH3NO2) IN THE CH STRETCH REGION

2016 ◽  
Author(s):  
Bryan Changala ◽  
Jun Ye ◽  
David Patterson ◽  
Ben Spaun
Keyword(s):  
High Resolution ◽  
Frequency Comb ◽  
Vinyl Bromide

Terahertz frequency comb by multifrequency-heterodyning photoconductive detection for high-accuracy, high-resolution terahertz spectroscopy

2006 ◽  
Vol 88 (24) ◽  
pp. 241104 ◽  
Author(s):  
Takeshi Yasui ◽  
Yasuhiro Kabetani ◽  
Eisuke Saneyoshi ◽  
Shuko Yokoyama ◽  
Tsutomu Araki
Keyword(s):  
High Resolution ◽  
Terahertz Spectroscopy ◽  
Frequency Comb ◽  
High Accuracy ◽  
Terahertz Frequency

Real-time spectral interleaved electro-optic dual-comb spectroscopy

2020 ◽  
Author(s):  
Bingxin Xu ◽  
Xinyu Fan ◽  
Shuai Wang ◽  
Zuyuan He
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Figure Of Merit ◽  
Frequency Comb ◽  
Sampling Rate ◽  
Optical Metrology ◽  
Broad Bandwidth ◽  
Frequency Combs ◽  
Electro Optic ◽  
Spectral Sampling

Abstract Optical frequency comb with evenly spaced lines over a broad bandwidth has revolutionized the fields of optical metrology and spectroscopy. Here, we propose an electro-optic dual-comb spectroscopy to real-time interleave the spectrum with high resolution, in which two electro-optic frequency combs are seed by swept light source. An interleaved spectrum with a high resolution is real-time recorded by the sweeping probe comb without gap time, which is multi-heterodyne detected by the sweeping local comb. The proposed scheme measures a spectrum spanning 304 GHz in 1.6 ms with a resolution of 1 MHz, and reaches a spectral sampling rate of 1.9*108 points/s under Nyquist-limitation. A reflectance spectrum is measured with a calculated figure-of-merit of 4.2*108, which shows great prospect for fast and high-resolution applications.

Frequency combs and precision spectroscopy of atomic hydrogen

2019 ◽  
pp. 142-215
Author(s):  
Thomas Udem
Keyword(s):  
High Resolution ◽  
Visible Light ◽  
Laser Spectroscopy ◽  
Quantum Electrodynamics ◽  
Atomic Hydrogen ◽  
Frequency Comb ◽  
Atomic Clock ◽  
Laser Frequency ◽  
High Resolution Spectroscopy ◽  
Frequency Combs

A laser frequency comb allows the phase coherent conversion of the very rapid oscillations of visible light of some 100s of THz down to frequencies that can be handled with conventional electronics. This capability has enabled the most precise laser spectroscopy experiments yet, which have allowed the testing of quantum electrodynamics, to determine fundamental constants and to construct an optical atomic clock. The chapter reviews the development of the frequency comb, derives its properties, and discusses its application for high resolution spectroscopy of atomic hydrogen.

Astronomical Laser Frequency Comb for High Resolution Spectrograph of a 2.16-m Telescope

2016 ◽  
Vol 36 (6) ◽  
pp. 0614001 ◽  
Author(s):  
吴元杰 Wu Yuanjie ◽  
叶慧琪 Ye Huiqi ◽  
韩建 Han Jian ◽  
邹璞 Zou Pu ◽  
傅凌统 Fu Lingtong ◽  
...  
Keyword(s):  
High Resolution ◽  
Frequency Comb ◽  
Laser Frequency

A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy

2015 ◽  
Vol 24 (2) ◽  
pp. 024213 ◽  
Author(s):  
Lei Hou ◽  
Hai-Nian Han ◽  
Wei Wang ◽  
Long Zhang ◽  
Li-Hui Pang ◽  
...  
Keyword(s):  
High Resolution ◽  
Frequency Comb ◽  
High Resolution Spectroscopy ◽  
In Series

scholarly journals Vernier spectrometer using counterpropagating soliton microcombs

Science ◽  
2019 ◽  
Vol 363 (6430) ◽  
pp. 965-968 ◽  
Author(s):  
Qi-Fan Yang ◽  
Boqiang Shen ◽  
Heming Wang ◽  
Minh Tran ◽  
Zhewei Zhang ◽  
...  
Keyword(s):  
High Resolution ◽  
Relative Frequency ◽  
Frequency Comb ◽  
Laser Frequency ◽  
Dual Frequency ◽  
Molecular Absorption ◽  
Laser Tuning ◽  
Technical Simplification

Determination of laser frequency with high resolution under continuous and abrupt tuning conditions is important for sensing, spectroscopy, and communications. We show that a single microresonator provides rapid and broadband measurement of optical frequencies with a relative frequency precision comparable to that of conventional dual-frequency comb systems. Dual-locked counterpropagating solitons having slightly different repetition rates were used to implement a vernier spectrometer, which enabled characterization of laser tuning rates as high as 10 terahertz per second, broadly step-tuned lasers, multiline laser spectra, and molecular absorption lines. Besides providing a considerable technical simplification through the dual-locked solitons and enhanced capability for measurement of arbitrarily tuned sources, our results reveal possibilities for chip-scale spectrometers that exceed the performance of tabletop grating and interferometer-based devices.

scholarly journals High-Resolution Optical Thickness Measurement Based on Electro-Optic Dual-Optical Frequency Comb Sources

2017 ◽  
Vol 23 (2) ◽  
pp. 140-146 ◽  
Author(s):  
Oscar E. Bonilla-Manrique ◽  
Pedro Martin-Mateos ◽  
Borja Jerez ◽  
Marta Ruiz-Llata ◽  
Pablo Acedo
Keyword(s):  
High Resolution ◽  
Optical Thickness ◽  
Frequency Comb ◽  
Thickness Measurement ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Electro Optic
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