Gamma Radiation-Induced Effects over an Optical Fiber Laser: Towards New Sensing Applications

Pérez-Herrera, Rosa Ana; Stăncălie, Andrei; Cabezudo, Pablo; Sporea, Dan; Neguţ, Daniel; Lopez-Amo, M.

doi:10.3390/s20113017

Cited by 9 publications

(6 citation statements)

References 37 publications

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“…After being fabricated, this MD-EDF was characterized by using an optical backscatter reflectometer (OBR). The timedomain acquisition mode with a spatial resolution of 10 µm was employed to evaluate the backscattered light [11] through this 2-meter-long piece of MD-EDF.…”

Section: Methodsmentioning

confidence: 99%

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Single Longitudinal Mode Lasers by Using Artificially Controlled Backscattering Erbium Doped Fibers

et al. 2021

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In this work, we propose and experimentally demonstrate a new distributed short linear cavity fiber laser. At one of the cavity ends, fabricated by a commercial femtosecond fiber laser chirped pulse amplifier, an artificially controlled backscattering erbium doped fiber section has been connected. This distributed reflector acts also as a saturable absorber, leading to the generation of tunable and switchable single longitudinal-mode laser emissions. The distributed reflector consists of 9 micro-drilled sections of about 1cm each one and randomly spread throughout 2 meters of highly doped erbium fiber. The total length of the fiber laser is 9.5 m and the laser shows a single mode behavior at all the emitted wavelengths. Using this new kind of reflecting saturable absorber, single and multiple single-mode emissions can be obtained. The achieved laser presents a pump threshold as low as 45 mW and shows up to 8 different single-mode emission lines with an optical signal to noise ratio of 45dB.

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Section: Methodsmentioning

confidence: 99%

“…Because of that ultra-high spatial resolution, the employed OBR (LUNA OBR 4600) can be used for internal component and fiber testing [11]. Figure 2 shows the backscattered optical power as a function of the total reflector fiber length when the MD-EDF is connected to the OBR.…”

Section: Methodsmentioning

confidence: 99%

Single Longitudinal Mode Lasers by Using Artificially Controlled Backscattering Erbium Doped Fibers

et al. 2021

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“…Before placing this MMF-RFG inside the surgical syringe to be positioned in the center of a highprecision rotation mount, its backscattered optical power was characterized with an optical frequency domain reflectometer (OFDR). This ultra-high spatial resolution optical backscattered reflectometer (OBR 4600, from LUNA) is commonly used not only for optical sensing of strain and temperature variations but to test fiber optic components, optical fibers and optical fiber sensors [26]. Free termination of this fiber-based reflector was immersed into index-matching oil to avoid undesired reflections.…”

Section: Fabrication and Characterization Processmentioning

confidence: 99%

Wavelength-switchable L-band fiber laser assisted by random reflectors

Pérez-Herrera

Roldán-Varona

Sanchez-Gonzalez

et al. 2023

J. Eur. Opt. Society-Rapid Publ.

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A wavelength-switchable L-band erbium-doped fiber laser (EDFL) assisted by an artificially controlled backscattering (ACB) fiber reflector is here presented. This random reflector was inscribed by femtosecond (fs) laser direct writing on the axial axis of a multimode fiber with 50 µm core and 125 µm cladding with a length of 17 mm. This microstructure was placed inside a surgical syringe to be positioned in the center of a high-precision rotation mount to accurately control its angle of rotation. Only by rotating this mount, three different output spectra were obtained: a single wavelength lasing centered at 1574.75 nm, a dual wavelength lasing centered at 1574.75 nm and 1575.75 nm, and a single wavelength lasing centered at 1575.5 nm. All of them showed an optical signal-to-noise ratio (OSNR) of around 60 dB when pumped at 300 mW.

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“…Over the past years, refractive index (RI) sensing has been carried out using different optical fiber-based sensors and its application has spread to many areas with impact on the quality of human life, such as monitoring of ionizing radiation, surgery, seismography, or medical imaging [2], [3]. These optical fiber sensors stand out for their wide bandwidth, immunity to electromagnetic interference, chemical corrosion resistance, small size and biocompatibility, among others [1].…”

Section: Introductionmentioning

confidence: 99%

Erbium-doped fiber ring cavity for the measurement of refractive index variations

Herrera

Soares

Novais

et al. 2023

European Workshop on Optical Fibre Sensors (EWOFS 2023)

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In this work, an erbium-doped fiber ring cavity based on a 3dB optical coupler for refractive index measurements is presented and experimentally verified. This interrogation system, based on a 1 x 2 optical coupler, uses one of these output ports to increase the reflected optical power by means of a fiber Bragg Grating (FBG), used as a reflector. Moreover, the other output port is used as a refractive index sensing head. A spectral analysis of this interrogator system as well as a fiber cavity ring refractive index sensor characterization are carried out. Finally, an experimental comparison of the refractive index sensor range when the 3dB coupler is replace by a 1x3 one is also presented.

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Gamma Radiation-Induced Effects over an Optical Fiber Laser: Towards New Sensing Applications

Cited by 9 publications

References 37 publications

Single Longitudinal Mode Lasers by Using Artificially Controlled Backscattering Erbium Doped Fibers

Single Longitudinal Mode Lasers by Using Artificially Controlled Backscattering Erbium Doped Fibers

Wavelength-switchable L-band fiber laser assisted by random reflectors

Erbium-doped fiber ring cavity for the measurement of refractive index variations

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