Temperature-sensitive dual-segment polarization maintaining fiber Sagnac loop mirror

Lim, Kok-Sing; Pua, Chang Hong; Harun, Sulaiman Wadi; Ahmad, Harith

doi:10.1016/j.optlastec.2009.08.015

Cited by 26 publications

(13 citation statements)

References 11 publications

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“…A strain or a temperature applied to the CFG changes refractive index and whole reflection spectrum is shifted. The wavelength shift is not identical to both polarization modes so as a result also spectral spacing is changed [8,10]. Figure 3.…”

Section: Reflective Hybrid Sensor Configurationmentioning

confidence: 99%

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Polarimetric and Fiber Bragg Grating reflective hybrid sensor for simultaneous measurement of strain and temperature in composite material

et al. 2015

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In order to measure strain independently from temperature, hybrid solution based on a polarimetric and chirped Fiber Bragg Grating (FBG) sensors is proposed. The sensor is designed in a reflective configuration, where the chirped FBG is written on a highly birefringent (HB) fiber. The FBG act as a sensing element and also as a mirror for the polarimetric sensor. Information from both polarimetric and FBG part of the sensor can be determined independently from spectral analysis of the reflected light. Strain and temperature sensitivity of the proposed sensor solution is measured. Relation between both sensitivities are different for the FBG and the polarimetric sensor. Taking advantage of this, both temperature and strain can be determined by using only one sensing fiber.

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Section: Reflective Hybrid Sensor Configurationmentioning

confidence: 99%

“…The light with shorter wavelength is reflected from the front part of the CFG and the light with longer wavelength is reflected from back part of CFG (Fig. 2.) [8]. The chirped grating is written on the HB fiber and because of that reflection points for the two polarization modes are shifted.…”

Section: Reflective Hybrid Sensor Configurationmentioning

confidence: 99%

Polarimetric and Fiber Bragg Grating reflective hybrid sensor for simultaneous measurement of strain and temperature in composite material

et al. 2015

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“…Polarization maintaining fiber (PMF) loop mirror (PM-FLM) sensors have many advantages, such as lightweight, corrosion resistance, anti-electromagnetic interference, easy fabrication, low cost, polarization independence to input light and great flexibility. 1,2 They have been widely used in measuring strain, 3,4 temperature, 5 torsion, 6 curvature, 7,8 twist, 9 pressure 10 and liquid level. 11 A PM-FLM sensor is usually demodulated by a wavelength [12][13][14][15][16][17] or light intensity 18 monitored by an optical spectrum analyzer (OSA) or optical power meter.…”

Section: Introductionmentioning

confidence: 99%

Influence of light source on the sensitivity of a Polarization Maintaining Fiber Loop Mirror vibration sensor

Jiang

Zhang

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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Wavelength or light intensity demodulation method for a polarization maintaining fiber loop mirror (PM-FLM) sensor is not only expensive but also unsuitable for vibration monitoring. This paper studies the voltage demodulation principle and explores theoretically the influence of light source on the sensitivity. Then a PM-FLM sensor is applied to vibration monitoring. A low-power narrow-band light source reflected from FBG and a high-power laser light source are used respectively as input. The time domain voltage signals of vibration from a photo-detector are collected by a data acquisition card and converted via a fast Fourier transform algorithm. The experimental result shows that a PM-FLM sensor using a high-power narrow-band light source as input has a higher sensitivity to vibration than the one using a low-power narrow-band light source. In practical application, we can choose a high-power narrow-band light source as input to improve the sensitivity to vibration.

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“…However, all-fiber-based low power variable reflectors or mirrors such as Sagnac loop mirrors (SLMs) can also be used to control the amount of optical power from low and high power fiber laser sources. All-single-mode fiber-based Sagnac loop mirrors have been widely used in temperature [18], strain [19], and pressure [20] high sensitivity sensors as well as in wavelength optical switches [21]. Moreover, SLMs with adjustable reflectivity have been used to form Fabry-Perot linear resonators [22][23][24][25] where the amount of the output optical power from the resonators depends on the reflectivity of the SLMs [26,27].…”

Section: Introductionmentioning

confidence: 99%

A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components

2017

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A simple, stable and inexpensive dual-output port widely tunable semiconductor optical amplifier (SOA)-based fiber compound-ring laser structure is demonstrated. This unique nested ring cavity enables high optical power to split into different branches where amplification and wavelength selection are achieved by using low-power SOAs and a tunable filter. Furthermore, two Sagnac loop mirrors, which are spliced at the two ends of the compound-ring cavity not only serve as variable reflectors but also channel the optical energy back to the same port without using any high optical power combiner. We propose and discuss how the demonstrated fiber compound-ring laser structure can be extended in order to achieve a high power fiber laser source by using low power optical components, such as N × N couplers and (N > 1) number of SOAs. A coherent beam-combining efficiency of over 98% for two parallel nested fiber ring resonators is achieved over the C-band tuning range of 30 nm. Optical signal-to-noise ratio (OSNR) of +45 dB, and optical power fluctuation of less than ±0.02 dB are measured over three hours at room temperature.

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Temperature-sensitive dual-segment polarization maintaining fiber Sagnac loop mirror

Cited by 26 publications

References 11 publications

Polarimetric and Fiber Bragg Grating reflective hybrid sensor for simultaneous measurement of strain and temperature in composite material

Polarimetric and Fiber Bragg Grating reflective hybrid sensor for simultaneous measurement of strain and temperature in composite material

Influence of light source on the sensitivity of a Polarization Maintaining Fiber Loop Mirror vibration sensor

A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components

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