Formation of Fiber Tapers by Chemical Etching for Application in Fiber Sensors and Lasers

Кузнецов, П. И.; Sudas, Dmitriy P.; Savel’ev, E. A.

doi:10.1134/s0020441220040302

Cited by 11 publications

(4 citation statements)

References 25 publications

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“…The residues of the etching agent were removed by repeated rinsing with bidistilled water. The procedure of chemical thinning of optical fibers is described in detail in [25]. After chemical thinning of the fiber to a diameter of less than 20 μm, the fragility issue of tapers becomes important.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

Sudas¹,

Savelyev²,

Кузнецов³

et al. 2021

Phys. Scr.

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The oscillation of erbium doped fiber lasers (EDFL) in the Q-switch mode is investigated. Etched out fiber tapers coated with two types of saturable absorbers (SA) are tested as passive Q-switches. SA of the first type comprises two-component silicone with nano-flakes of a Bi 2 Te 3 single crystal dissolved in it. A thin film of Bi 2 Te 3 synthesized by the Metalorganic Chemical Vapor Deposition (MOCVD) method on the surface of the fiber taper and coated with the same silicone served as SA of the second type. Housed within a refrigerator the fabricated sample of fiber taper with SA was in series plug into the fiber ring of the laser. A maximum is observed in the temperature dependence of the EDFL pulse repetition rate with both types of Q-switches. A decrease in temperature to -4 °C (for the first type) and to 9.5 °C (for the second one) led to the oscillation wavelength change from 1560 to 1530 nm. Cooling of Q-switches of the first and second types was accompanied by a decrease in the duration of laser pulses by a factor of 2.5 and 3.5, respectively, at a pump power corresponded to the conversion of laser oscillation from CW to repetitively-pulsed mode. At a given laser pump power, a 20% and 40% increment in the pulse repetition rate is observed upon cooling of passive Q-switches based on Bi 2 Te 3 nanopowder-in-polymer and Bi 2 Te 3 thin-film, up to temperatures of -14.8 °C and 4.4 °C, respectively, as compared to that one at room temperature. A diminution in the temperature of a passive Q-switch made it possible to obtain pulsed laser oscillation in a circuit that did not support the pulsed mode at room temperature.

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Section: Preparation Of Samplesmentioning

confidence: 99%

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

Sudas¹,

Savelyev²,

Кузнецов³

et al. 2021

Phys. Scr.

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show abstract

“…The latter approach has a number of advantages. Firstly, the geometry of the fiber core remains intact, which allows to almost completely avoid the appearance of losses with this processing method [ 25 ]. Secondly, the constant distance between the coating material and the fiber core does not require the optimization of the film geometry, as, for example, in the case of D-shaped fibers [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

A Study of the Lossy Mode Resonances during the Synthesis Process of Zinc Telluride Films

Кузнецов

Sudas

Savelyev

2022

Sensors

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Films of zinc telluride (ZnTe) were deposited on the surface of a chemically thinned section of an optical fiber by metalorganic chemical vapor deposition. The boundary values of temperatures and the concentration ratios of the initial tellurium and zinc precursors at which the synthesis of ZnTe coatings is possible are determined. The influence of the position of the thinned part of the optical fiber in the reactor on the growth rate of films on the side surface of the fiber was studied, on the basis of which, the parameters of the deposition zone were determined. By placing a section of an optical fiber with an etched cladding in the center of this zone, sensitive elements for refractometers were created. The principle of their operation is based on the dependence of the spectral position of the lossy mode resonance (LMR) maximum on the refractive index (RI) of the external medium. It has been found that even thin films deposited on a light guide in a continuous process have cracks. It is shown that the interruption of the deposition process makes it possible to avoid the appearance of defects in the zinc telluride layers even with the repeated deposition of the sensor. The sensitivity of the spectral position of the LMR to changes in the RI of aqueous sodium chloride solutions in the range from 1.33 to 1.35 for the first transverse electric and transverse magnetic LMRs was 6656 and 6240 nm per refractive index unit, respectively.

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“…Nowadays, optical fiber ring laser sensors have become a hot topic due to their advantages of high signal-to-noise ratio and narrow 3-dB bandwidth [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Liu et al, proposed a cascaded MZI for strain sensing [ 28 ], successfully achieving a sensitivity of 52.5 pm/µε.…”

Section: Introductionmentioning

confidence: 99%

A Temperature Independent Inclinometer Based on a Tapered Fiber Bragg Grating in a Fiber Ring Laser

Lin

Zhou

Shao

et al. 2021

Sensors

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We demonstrate a new concept for an all-fiber inclinometer based on a tapered fiber Bragg grating (tFBG) in a fiber ring laser (FRL) with the capability of measuring the tilt angle and temperature simultaneously. The sensor performance is analyzed theoretically and investigated experimentally. The dependence of tilt angle on the spectral response in variable temperature conditions was measured. Two inclinometers with different lengths have been fabricated and characterized in FRL. The sensitivity is 0.583 dB/° and 0.849 dB/°, respectively, in the range of 0° to 90°. Thanks to the FRL system, narrow 3-dB bandwidth (<0.1 nm) and high optical signal-to-noise ratio (~60 dB) are achieved. The tFBG in the FRL system can be used for working as a temperature insensitive inclinometer. The results suggested that the proposed inclinometer has the advantages of compact size and convenient manufacture, enhancing its potential for application prospect.

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Formation of Fiber Tapers by Chemical Etching for Application in Fiber Sensors and Lasers

Cited by 11 publications

References 25 publications

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

A Study of the Lossy Mode Resonances during the Synthesis Process of Zinc Telluride Films

A Temperature Independent Inclinometer Based on a Tapered Fiber Bragg Grating in a Fiber Ring Laser

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