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- All-fiber frequency shifted self-mixing interferometry for . . .
On the other hand, the frequency domain measurement method connects the laser output power to the spectrum analyzer through the photodetector (PD) for measurement The Doppler shift brought about by the particle crossing under steady flow can be accurately derived
- Research on Fiber-Optic Optical Coherence Ranging System . . .
Abstract In this paper, a system for absolute distance measurement is proposed based on laser frequency scanning interferometry (FSI) The system utilizes a digitally tunable laser as the light source and employs synchronized pulses to drive an analog-to-digital converter (ADC) for interference signal acquisition The frequency domain demodulation for absolute distance measurement is achieved
- Frequency domain interferometry for measuring ultrafast . . .
In this review, we introduce an emerging ultrafast spectroscopy method – frequency domain interferometry This simple adaptation of transient absorption spectroscopy provides a model-independent means of spectrally resolving photoinduced changes in a materials refractive index
- A Review of a Spectral Domain Interferometer with a Frequency . . .
This review paper deals with length measurement based on a spectral-domain interferometer (SDI) using an optical comb The SDI can measure the optical path difference in real time by acquiring the interference spectrum in a wide spectral bandwidth A typical SDI using a broadband light source has a limited measurement range of only several millimeters due to its short coherence length The
- An ultrafast ranging method using optical frequency comb and . . .
A dispersive Fourier transformation-based ranging method utilizing a femtosecond laser frequency comb is demonstrated The target and measurement signals interfere through a Mach-Zehnder interferometer and then enter a single-mode fiber with a sufficiently large group velocity dispersion (GVD) to be stretched and extended The spectral interference information is mapped to the time-domain
- Frequency-modulated continuous-wave laser interferometry . . .
Frequency-modulated continuous-wave (FMCW) laser interferometry technology holds significant potential for applications in the fields of ultraprecision manufacturing and high-precision sensing This paper proposes a novel approach among current phase demodulation methods is based on cross-correlation to address the challenge of this technology On the basis of nonlinear correction of a
- Research on Fiber-Optic Optical Coherence Ranging System . . .
The frequency domain demodulation for absolute distance measurement is achieved through a three-spectrum line interpolation method based on the Hanning window The system takes advantage of the spatial filtering characteristics of a single-mode optical fiber and the diffuse reflection properties of light to achieve a high integration of the
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