By combining frequency-swept and frequency-fixed interferometry, and using fusion processing of interferometric signals, this method not only can eliminate the Doppler-induced error, but also can give the dynamic clearance value at each sampling point. To verify this method, an all fiber-optic ...
Continuous real-time correction and averaging for frequency comb interferometry. Opt. Express 20, 21932–21939 (2012). 13. Ideguchi, T., Poisson, A., Guelachvili, G., Picqué, N. & Hänsch, T. W. Adaptive real-time dual-comb spectroscopy. Nat. Commun. 5, 3375 (2014). 14. Chen...
5.2.7 Swept-frequency absolute distance interferometry Swept-frequency interferometry using laser diodes or other solid-state lasers is becoming popular due to the versatility of its sources and its ability to measure length absolutely. Currently such interferometers achieve high resolution but relatively ...
To address this issue, in the present study we have developed a novel optical coherence tomography (OCT) method that utilizes multifrequency swept interferometry. The OCT volume data can be acquired by sweeping the multifrequency modes produced by combining a tunable Fabry-Perot filter and an 840...
This is set with an upper and lower bound that also dictates whether the parameter is swept through, or if they are equal, is held constant. The RF field is characterised similarly, however the beam waist and direction is not set for the model. Finally, the excitation and decay pathway ...
(2003). “Sensitivity advantage of swept source and Fourier domain optical coherence tomography.” Optics Express 11(18): 2183-2189. Choma, M. A., C. H. Yang, et al. (2003). “Instantaneous quadrature low-coherence interferometry With 3×3 fiber-optic couplers.” Optics Letters 28(22)...
Distance measurement by conventional optical interferometry requires physical movement of an optical element. The present system obtains interference with a continuous range of radiation wavelengths, providing a direct measurement of a constant optical path difference, in terms of the fringe count and the...
In one type of DSS, swept-wavelength (of light) interferometry can be used to interrogate a series of fiber Bragg gratings. Each fiber Bragg grating (FBG) in the series acts as a sensor. The optical fiber, in one example, is affixed to casing or wrapped along a length of the casing....
Optical linear frequency sweep based on mode-spacing swept comb and multi-loop phase-locking for FMCW interferometry We report on the generation of a highly coherent broadband optical linear frequency sweep (LFS) using mode-spacing swept comb and multi-loop composite opti... W Xie,Y Dong,W Wei...
We now determine the frequency bandwidth by fixing the wavelength of the pump at λ 2 = 1,350 nm and calculating the SFG efficiency as an unpolarized signal wavelength is swept around the operating wavelength of λ 1 = 1,550 nm (Figure 3(e)). The transmission into the desired |V...