Signal interrogators
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A short-range quasi-distributed strain and temperature sensing system utilizing a standard telecom laser diode
This article presents a short-range fiber-optic quasi-distributed sensing device suitable for strain and temperature measurement. The sensing assembly consists of an fs laser inscribed reference mirror and a sensing array of equidistantly positioned mirrors. Utilization…
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A short-range quasi-distributed strain and temperature sensing system utilizing a standard telecom laser diode
This article presents a short-range fiber-optic quasi-distributed sensing device suitable for strain and temperature measurement. The sensing assembly consists of an fs laser inscribed reference mirror and a sensing array of equidistantly positioned mirrors. Utilization…
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A fiber-optic gas sensor and method for the measurement of refractive index dispersion in NIR
This paper presents a method for gas concentration determination based on the measurement of the refractive index dispersion of a gas near the gas resonance in the near-infrared region (NIR). The gas refractive index dispersion…
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THz signal generator using a single DFB laser diode and the unbalanced optical fiber interferometer.
This paper presents a frequency-modulated optical signal generator in the THz band. The proposed method is based on a fast optical frequency sweep of a single narrowband laser diode used together with an optical fiber…
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Interrogation of FBGs and FBGs arrays using standard telecom DFB diode
An efficient fiber Bragg grating (FBG) sensor integration system, which utilizes a small number of standard Telecom opto-electronics components, is presented in this paper. Wavelength-swept optical pulses were generated by driving a standard telecom DFB…
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High-speed interrogation of low-finesse Fabry-Perot sensors using a Telecom DFB laser diode
This paper presents a high-speed high-resolution low-finesse Fabry-Perot sensor interrogation system. The system utilizes a standard telecommunication distributed-feedback laser diode and an all-digital high-speed signal processing based on field-programmable-gate-array. The system can resolve multiple Fabry-Perot…
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An all-fiber scanning interferometer with a large optical path length difference
This paper describes the design of an all-fiber scanning interferometer. The main component of the system is a thermoelectric cooler that can rapidly heat or cool several meters of optical fiber. Over 4 cm variation…
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High-resolution spectrally-resolved fiber optic sensor interrogation system based on a standard DWDM laser module
This paper presents a spectrally-resolved integration system suitable for the reading of Bragg grating, all-fiber Fabry-Perot, and similar spectrally-resolved fiber-optic sensors. This system is based on a standard telecommunication dense wavelength division multiplexing transmission module…
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Rapid and broad wavelength sweeping of standard telecommunication distributed feedback laser diode
This Letter presents a method for the fast and broad wavelength sweeping of a standard setup of a diode’s active region and its immediate vicinity, which contain the diode’s optical feedback system. The selective and…