A spider uses up to seven different types of silk, all having specific functions, as building material, weapon, and sensory organ detect the presence preys on its web. Recently, scientists have put under limelight extraordinary properties this ancient material. Indeed, native directly extracted from spiders, is a tough, biodegradable, biocompatible thread used mainly for tissue engineering textile applications. Blessed with outstanding optical properties, protein strand can also be...

Relative intensity noise and frequency have been measured for the first time a single-frequency Brillouin chalcogenide As38Se62 fiber laser. This is also demonstration of compact suspended-core laser, which exhibits low threshold power 22 mW slope efficiency 26% nonresonant pumping.

A compact second-order Stokes Brillouin fiber laser made of microstructured chalcogenide is reported for the first time. This required very low pump power conversion: 6 mW order lasing and only 30 second with nonresonant pumping. We also show linewidth-narrowing as well intensity noise reduction both 1st 2nd component when compared to that source.

Chemical sensing using optical fibers is often challenging, as it generally difficult to achieve strong interaction between the guided light and analyte at wavelength of interest for performing detection. Despite this difficulty, many schemes exist (and can be found in literature) point chemical fiber sensors. However, challenge increases even further when comes fully distributed sensing. In case, signal which interacts with typically also that has travel from interrogator: a good...

Up to 16-dB frequency noise reduction and a linewidth 8 times narrower than that of the pump source is reported for Stokes component in compact Brillouin fiber laser (BFL) made up chalcogenide microstructured fiber. Since wave not resonant ring cavity, an active stabilization primordial, thus making system simpler cheaper. Although only 3-meter-long used as gain medium, very low threshold power 6 mW obtained nonresonant pumping. The linewidth-narrowing effect achieved our BFL cavity also discussed.

Whilst being thoroughly used in the textile industry and biomedical sector, silk has not yet been exploited for fibre optics-based sensing although fibres directly obtained from spiders can guide light have shown early promises to sensitive some solvents. In this communication, a pioneering optical sensor based on spider is reported, demonstrating first time use of as an detect polar solvents such water, ammonia acetic acid.

We report for the first time a multiplexed array of 12 distributed feedback fiber lasers (DFB FLs) on single optical fiber, separated by only 100 GHz (0.8 nm) in C-band. These are pumped 200 mW laser diode at 1480 nm with no apparent impact sensor noise floor despite fact that residual reflections from adjacent gratings may be enhanced due to smaller wavelength separation. Each DFB FL, especially developed serial multiplexing, exhibits low lasing threshold typically between 1 and 2 mW,...

Optical characterisation of a Nephila edulis spider dragline silk is performed. The fiber transmits light up to 1400 nm with propagation loss ~9 dB/cm and birefringence 8×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-3</sup> measured at 1302 nm.

In this paper, an all-fiber Brillouin laser ring cavity using a 3-m-long suspended-core chalcogenide As₃₈Se₆₂ fiber is reported for the first time to our knowledge. For nonresonant with no servo-locking, threshold power of 37 mW and efficiency 26 % were obtained having core diameter 5 &#956;m. The linewidth pump respectively measured be below 4 kHz, resolution autocorrelator, 250 thus showing linewidth-narrowing nature laser. This result paves way compact lasers low...

A technique to measure nonlinear processes, such as stimulated Brillouin scattering, with a very-high signal-to-noise ratio (SNR) is presented. gain measurement 77 dB SNR demonstrated over 2m-long section of single-mode fiber.

Fibre optics sensors have been identified as very good candidates for environmental monitoring inside the silicon detectors operated at CERN's Large Hadron Collider. In this study, we present results from first highly sensitive relative humidity distributed sensor with kilometres sensing range. The setup is a 70 cm spatial resolution phase-sensitive Optical Time Domain Reflectometry (OTDR) and able to monitor fibre lengths up 10 km. coating effect also evaluated, analysing different...

The distributed Brillouin gain profile of an ultrathin optical microwire made chalcogenide-glass is characterized using a phase-modulated correlation-domain measurement technique. Method resolves variations uniformity below 5% along 13 cm-long microwire.

A fiber optic health-monitoring system for refractory lining in steel-making processes is presented. Its applicability as an early-warning damage demonstrated by the results obtained a field trial, which 240 m of was embedded electric arc furnace. The based on Raman distributed sensing and polyimide coated fibers metal tube. presented from temperature cycling calibration at temperatures up to 600 °C show that adequate accuracy stability application can be attained.

In this communication, a novel compact fibre Bragg grating-based thermometer for on-line temperature monitoring of drill bits is reported. Our proposed technique can potentially be used to optimize any drilling process, requiring the use small bits, through direct measurement at bit instead relying on indirect parameters (speed rotation, applied force) in order avoid an overheating as it currently done nowadays.

The optical fibre coating is essential to ensure high performance and reliability of the fibre. Out all polymer-coated fibres, polyimide coatings provide highest temperature rating, typically rated for use in sensing applications at 300˚C (in air), with short excursion 350˚C. In this communication, we assess whether inclusion graphene-based nanoparticles, such as graphene oxide, a can enhance durability fibres temperatures. Draw tower fabrication nanocomposite polymer described. Tensile...

A long length distributed hydrogen sensor was demonstrated for the first time, using a draw-tower fabricated optical fiber with coating that reacts exothermically in presence of air.

From the spider's perspective, silk is not only a building material but also safety net, weapon and sensory organ to detect presence of preys on its web. Indeed, this primeval has been shaped over hundreds millions years by spiders create myriad fibre types with different level toughness, elasticity, stickiness depending attributed function in human scientists are currently working harnessing all extraordinary properties for applications would never thought of, from biocompatible tissue...

An all-fiber setup to store and retrieve light pulses using electric control is presented. The experiment based on a Sagnac interferometer with phase modulator fabricated poled fiber internal electrodes.

The temperature measurement of a drill bit during an implantology drilling process is proposed by using fiber Bragg grating fitted inside the bit. Due to rotational nature process, free-space fiber-optic rotary joint used for interrogating grating. mechanical clearances and interferometric noise induced at this joint, signal integrity strongly deteriorated not workable without adequate measures. These measures involve proper lensing processing in order remove noise. Finally, heating on...

Draw tower fabrication of a novel optical fibre with nanocomposite polymer coating is reported. Preliminary results show it more robust to high-temperature ageing, and moisture-induced strain than standard fibres when used for distributed sensing.

This paper presents a humidity-insensitive silicone coating compatible with draw tower production. It enables distributed humidity sensing since it can be used as reference fiber. Experimental findings demonstrate excellent insensitivity (-20 to 45°C, 10-60%RH).

A spider uses up to seven different types of silk, all having specific functions, build its web. For scientists, native silk - directly extracted from spiders is a tough, biodegradable and biocompatible thread used mainly for tissue engineering textile applications. Blessed with outstanding optical properties, this protein strand can also be as an fibre is, moreover, intrinsically sensitive chemical compounds. In communication, pioneering proof-of-concept experiment using in pristine...

The goal of this presentation is to provide first results concerning the optical noise a fiber laser used as an underwater acoustic sensor: hydrophone. main sensor characteristics are: −1): A sensitivity allowing detect all levels above background sea (the so‐called deep‐sea state 0). Among other applications, one may mention: seismic risk prevention, oil prospection, ship detection, etc. −2) : An reduced its minimal value: it lower bound below which no pressure variation detectable.We...

Can we use spider silk threads as natural, biological optical fibre sensors?In this communication, will see how can harness the properties of dragline and it for sensing.OCIS codes: (060.2370)Fiber optics sensors; (060.2400)Fiber properties; (060.2300)Fiber measurements