White-light interferometer with high sensitivity and resolution using multi-mode fibers

Song, Guiju; Wang, Xiangzhao; Fang, Zujie

doi:10.1078/0030-4026-00044

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…In recent years, interest in vibration sensors has grown as they are found to be useful for monitoring the condition of rotating machinery, where excessive vibration could indicate overloading, inadequate lubrication, or bearing wear [1–5]. Commercial vibration sensors use a piezoelectric ceramic strain transducer attached to a metallic proof mass in order to respond to an externally imposed acceleration.…”

Section: Introductionmentioning

confidence: 99%

“…Many optical methods have been proposed in the literatures since they provide excellent technologies to develop non‐contact sensors [2, 3]. In interferometric method, a laser signal beam is directed onto a moving target and the back‐reflected light is recombined with part of the incident light, using techniques such as Michelson or Mach–Zendher schemes [4]. Interferometers are high in performance but also very expensive.…”

Section: Introductionmentioning

confidence: 99%

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Demonstration of acoustic vibration sensor based on microfiber knot resonator

Sulaiman

Muhammad

Harun

et al. 2013

Micro & Optical Tech Letters

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A compact microfiber‐based acoustic vibration sensor is demonstrated using microfiber knot resonator (MKR) structure, which is fabricated by flame brushing technique. It is observed that the extinction ratio of the resonant spectrum of the knot resonator is linearly proportional to the vibration amplitude. This is attributed to the interruption of the effective coupling of the MKR which is correlated with the exposed vibration force. It is also shown that the resonant wavelength shifts by about 0.19 nm as the normalized vibration energy is increased from 0 to 10%. The performance of the sensor is then further investigated by monitoring the fast Fourier transform (FFT) of the signal when the MKR is exposed to various vibration frequencies as a narrowband 1545 nm laser is injected into the MKR. In the spectra of the signals, the frequency of the applied vibration is clearly shown as it has the highest magnitude followed by the accompanying harmonics. This holds true for all vibration frequencies. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1138–1141, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27526

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Demonstration of acoustic vibration sensor based on microfiber knot resonator

Sulaiman

Muhammad

Harun

et al. 2013

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…Each of the single mode and multi-mode fibers has their own advantages and disadvantages. For example usually white light single mode fiber interferometer provides stable and large signal to noise ratio while in the interferometers based on multi-mode fiber, cheaper optical components are employed (Song et al, 2001;Manojlovi et al, 2010). Generally there are several WLI topologies corresponding to the standard optical fiber interferometer and their combinations (Yuan, 2002;Mercado et al, 2001;).…”

Section: White Light Fiber Interferometrymentioning

confidence: 99%