Multilongitudinal mode fiber laser for strain measurement

Liu, Shengchun; Yin, Zuowei; Zhang, Liang; Gao, Liang; Chen, Xiangfei; Cheng, Jianchun

doi:10.1364/ol.35.000835

Cited by 68 publications

(32 citation statements)

References 11 publications

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“…The threshold power of the MMFRL is 4.5 mW, which is slightly larger than that provided in Ref. 12. It is mainly because the insert loss of a 3-dB coupler increases the laser threshold.…”

Section: Experiments Results and Discussionmentioning

confidence: 63%

“…Therefore, in this short laser cavity structure, it seems difficult to reach an ideal high precision. Recently, we have proposed a multilongitudinal mode laser sensor based on a long linear laser resonant cavity composed of two FBGs, 12 in which the polarization noise in the beat signals is greatly reduced. In addition, this laser sensor has a lower threshold.…”

Section: Introductionmentioning

confidence: 99%

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Multilongitudinal mode fiber-ring laser sensor for strain measurement

Liu

Gao

et al. 2011

Opt. Eng

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A multilongitudinal mode fiber ring laser sensor is proposed and experimentally demonstrated by measuring the strain applied on the laser sensor head. The ring cavity of the laser is formed by a 3-dB coupler, a section of erbium-doped fiber, and one fiber Bragg grating. Photonic generation of beat signals and strain measurement theory are discussed in detail. The strain applied on the fiber ring cavity is obtained by measuring the beat frequency shift. The selection way of the optimal beat signal for strain measurement is obtained by experimental research and discussion. The root-mean-square deviation of the strain and the response of beat frequency to the strain are 2.7 με and 1.5 kHz/με at 1993 MHz, respectively. The proposed sensor scheme offers a cost-effective and high-stability device for strain measurement. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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“…The threshold power of the MMFRL is 4.5 mW, which is slightly larger than that provided in Ref. 12. It is mainly because the insert loss of a 3-dB coupler increases the laser threshold.…”

Section: Experiments Results and Discussionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Multilongitudinal mode fiber-ring laser sensor for strain measurement

Liu

Gao

et al. 2011

Opt. Eng

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“…Fiber laser strain sensing systems have also been widely demonstrated because of their high optical intensity and optical signal to ratio (OSNR), and narrow linewidth, which determine its inherent high resolution. A number of fiber laser sensors have been demonstrated [16]- [19]. In these schemes, the radio frequency spectrum analyzer (RFSA) and OSA are usually utilized to monitor the beat frequency and wavelength shifting to measure the sensing parameters dynamically.…”

Section: Introductionmentioning

confidence: 99%

A Static Axial Strain Fiber Ring Cavity Laser Sensor Based on Multi-Modal Interference

Liu

et al. 2013

IEEE Photon. Technol. Lett.

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A novel and simple static strain fiber ring cavity laser sensor based on all-fiber single-mode-multimode-singlemode (SMS) structure filter is proposed and experimentally demonstrated. When an axial strain is applied on the SMS filter, the pass-band varies, resulting in shifts of the lasing central wavelength. Thus, the value of axial strain imposed on the structure can be calculated by the monitored central wavelength of the system via the function relationship between these two parameters. Compared with the conventional axial strain sensing system based on an SMS fiber structure, the proposal exhibits additional advantages in terms of high optical signal to noise ratio (∼50 dB) and narrow 3 dB bandwidth (<0.05 nm) apart from simple fabrication and low cost. A good linearity is obtained between the axial strain applied on the SMS filter and central wavelength of the proposed laser sensing system with R 2 of 0.99954, and high sensitivity of 2.3 pm/με in the range 0-2333 με is successfully achieved.Index Terms-Measurement, modal interference, fiber ring cavity laser.

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“…To solve this problem, fiber laser sensors are thought to be good candidates for acoustic pressure measurement as a result of their demodulation in the frequency domain. Owing to their ultra-high sensitivity to temperature and strain as well as multiplexed ability, both distributed feedback (DFB) and distributed Bragg reflector (DBR) types have been investigated for environmental disturbances sensing [8,9]. In comparison with the DFB laser sensor, it is easier and cheaper to fabricate a DBR one.…”

Section: Introductionmentioning

confidence: 99%

Passively mode-locked fiber laser sensor for acoustic pressure sensing

Wang

Lü

Liao

et al. 2013

Journal of Modern Optics

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The development is reported of a multi-longitudinal mode fiber laser sensor based on passive mode locking employing carbon nanotubes in the laser cavity. A polymer membrane is employed beneath the pre-strained erbium-doped fiber (EDF) to convert the sound pressure disturbance into axial strain, alter the cavity length, and induce a shift of the longitudinal modes beat. Hence, acoustic pressure measurement can be carried out by detecting the shift of the beat frequency. Experimental results show comparable strain and sound pressure sensitivity of~0.5 kHz/με and 147.2 Hz/Pa, respectively. The proposed sensor is an alternative for the measurement of acoustic pressure and possesses the advantages of good stability and ease of interrogation.

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Multilongitudinal mode fiber laser for strain measurement

Cited by 68 publications

References 11 publications

Multilongitudinal mode fiber-ring laser sensor for strain measurement

Multilongitudinal mode fiber-ring laser sensor for strain measurement

A Static Axial Strain Fiber Ring Cavity Laser Sensor Based on Multi-Modal Interference

Passively mode-locked fiber laser sensor for acoustic pressure sensing

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