Laser frequency noise measurement using an envelope-ratio method based on a delayed self-heterodyne interferometer

2019 ◽  
Vol 435 ◽  
pp. 244-250 ◽  
Author(s):  
Yimin Li ◽  
Zhuo Fu ◽  
Lei Zhu ◽  
Jie Fang ◽  
Haoran Zhu ◽  
...  
Keyword(s):  
Laser Frequency ◽  
Noise Measurement ◽  
Ratio Method ◽  
Frequency Noise ◽  
Heterodyne Interferometer

scholarly journals Investigation and Mitigation of Noise Contributions in a Compact Heterodyne Interferometer

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5788
Author(s):  
Yanqi Zhang ◽  
Adam S. Hines ◽  
Guillermo Valdes ◽  
Felipe Guzman
Keyword(s):  
Noise Source ◽  
Laser Frequency ◽  
Noise Estimation ◽  
Frequency Noise ◽  
Correction Algorithm ◽  
Dynamic Measurements ◽  
Heterodyne Interferometer ◽  
Order Of Magnitude ◽  
Noise Correction ◽  
Laser Interferometers

We present a noise estimation and subtraction algorithm capable of increasing the sensitivity of heterodyne laser interferometers by one order of magnitude. The heterodyne interferometer is specially designed for dynamic measurements of a test mass in the application of sub-Hz inertial sensing. A noise floor of 3.31×10−11m/Hz at 100 mHz is achieved after applying our noise subtraction algorithm to a benchtop prototype interferometer that showed a noise level of 2.76×10−10m/Hz at 100 mHz when tested in vacuum at levels of 3×10−5 Torr. Based on the previous results, we investigated noise estimation and subtraction techniques of non-linear optical pathlength noise, laser frequency noise, and temperature fluctuations in heterodyne laser interferometers. For each noise source, we identified its contribution and removed it from the measurement by linear fitting or a spectral analysis algorithm. The noise correction algorithm we present in this article can be generally applied to heterodyne laser interferometers.

Polarization influence and its mitigation on laser frequency noise measurement by a short-delayed self-homodyne interference method

2019 ◽  
Vol 58 (24) ◽  
pp. 6693 ◽  
Author(s):  
Jiejun Zhao ◽  
Fei Yang ◽  
Xi Zhang ◽  
Zhidan Ding ◽  
Rui Wu ◽  
...  
Keyword(s):  
Laser Frequency ◽  
Noise Measurement ◽  
Interference Method ◽  
Frequency Noise

Laser frequency noise measurement in a resonant fiber optic gyro

Optik ◽  
2018 ◽  
Vol 175 ◽  
pp. 296-303
Author(s):  
Guhong Zhang ◽  
Zhuoqun Yu ◽  
Zhaobin Xu ◽  
Zhonghe Jin
Keyword(s):  
Fiber Optic ◽  
Laser Frequency ◽  
Noise Measurement ◽  
Frequency Noise ◽  
Fiber Optic Gyro

scholarly journals Estimation of the Laser Frequency Noise Spectrum by Continuous Dynamical Decoupling

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Manchao Zhang ◽  
Yi Xie ◽  
Jie Zhang ◽  
Weichen Wang ◽  
Chunwang Wu ◽  
...  
Keyword(s):  
Noise Spectrum ◽  
Laser Frequency ◽  
Frequency Noise ◽  
Dynamical Decoupling

scholarly journals Impact of laser frequency noise on high-extinction optical modulation

2020 ◽  
Vol 28 (26) ◽  
pp. 39606
Author(s):  
Gavin N. West ◽  
William Loh ◽  
Dave Kharas ◽  
Rajeev J. Ram
Keyword(s):  
Laser Frequency ◽  
Optical Modulation ◽  
Frequency Noise

Laser frequency noise immunity in multiplexed displacement sensing

2011 ◽  
Vol 36 (5) ◽  
pp. 672 ◽  
Author(s):  
Danielle M. R. Wuchenich ◽  
Timothy T.-Y. Lam ◽  
Jong H. Chow ◽  
David E. McClelland ◽  
Daniel A. Shaddock
Keyword(s):  
Noise Immunity ◽  
Laser Frequency ◽  
Frequency Noise

Low-Frequency Noise Measurement and Parameters Extraction for Semiconductor Lasers

Applied laser ◽  
2014 ◽  
Vol 34 (4) ◽  
pp. 355-358
Author(s):  
曹军胜 Cao Junsheng ◽  
张俊 Zhang Jun ◽  
郜峰利 Gao Fengli ◽  
宁永强 Ning Yongqiang
Keyword(s):  
Semiconductor Lasers ◽  
Low Frequency ◽  
Noise Measurement ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Parameters Extraction
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