Chemical etching of optical fibre tips — experiment and model

Puygranier, B.A.F.; Dawson, Paul

doi:10.1016/s0304-3991(00)00069-3

Cited by 54 publications

(39 citation statements)

References 27 publications

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“…1, a semi-finished probe is the conjunction of two cylinders and a truncated cone in appearance. The boundary between lower cylindrical and conical part is usually considered as the place where the meniscus stays at [1,3,4,8]. In this section, we argue that the boundary is & Ruiqi Shen rqshen@mail.njust.edu.cn Yiru Chen xzczd@sina.cn actually a narrow transitional zone and the inclination angle at the boundary is different from that at both parts, assuming James' formula describes the forming process of probe tip.…”

Section: Theorymentioning

confidence: 98%

“…Hoffman [3] studied the influence of protection layer and tried to consider the meniscus height difference between conical and lower cylindrical part of semi-finished probe. Puygranier [4] found etchant composition and temperature have no impact on the cone angle of tip and pointed out the transition between the core and cladding materials of fiber tip does not own any characteristic morphological feature. When studying the shape of a meniscus on outside of a circular cylinder, James [5] derived a formula, hereafter called James' formula…”

Section: Introductionmentioning

confidence: 99%

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A reconsideration for forming mechanism of optic fiber probe fabricated by static chemical etching

Chen

Shen

2016

Appl. Phys. A

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Section: Theorymentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A reconsideration for forming mechanism of optic fiber probe fabricated by static chemical etching

Chen

Shen

2016

Appl. Phys. A

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“…In comparison to other etching methods, wet chemical etching offers a simple and inexpensive fabrication technique [29]. Chemical etching of fiber occurs due to the reaction between hydrofluoric (HF) acid and fused silica immersed in HF solution.…”

Section: Concave Tip Fiber Design and Fabricationmentioning

confidence: 99%

Laser beam shaping and mode conversion in optical fibers

Mayeh

Farahi

2011

Photonic Sens

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A new class of all-fiber beam shaping devices has been realized by inverse etching the end face of single mode and multimode fibers to form a concave cone tip. Concave tip fiber can convert a Gaussian beam profile to a flat top beam profile with a uniform intensity distribution. A flat top beam with intensity variation of approx. 5% and flat top diameter to spot diameter ratio of 67% has been achieved. This device can also change the beam shape from a Gaussian to a donut by moving the observation plane. A flat top multimode fiber beam delivery is attractive for applications which require high power and uniform intensity distribution. In single mode fiber, concave tips could be used to reduce the beam spot size diameter, enabling efficient light coupling from a single mode fiber to an integrated optical waveguide.

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“…The reaction process can be described as [53]: [54]. When the ratio of NH 4 F: HF is less than 1.7:1, the core has a faster etching rate than the cladding and this leads to an inverted cone on the fiber end;…”

Section: Fabricationmentioning

confidence: 99%

Microgap Structured Optical Sensor for Fast Label-Free DNA Detection

Wang

Cooper

Wang

2008

J. Lightwave Technol.

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DNA detection technology has developed rapidly due to its extensive application in clinical diagnostics, bioengineering, environmental monitoring, and food science areas.Currently developed methods such as surface Plasmon resonance (SPR) methods, fluorescent dye labeled methods and electrochemical methods, usually have the problems of bulky size, high equipment cost and time-consuming algorithms, so limiting their application for in vivo detection. In this work, an intrinsic Fabry-Perot interferometric (IFPI) based DNA sensor is presented with the intrinsic advantages of small size, low cost and corrosion-tolerance. This sensor has experimentally demonstrated its high sensitivity and selectivity.In theory, DNA detection is realized by interrogating the sensor's optical cavity length variation resulting from hybridization event. First, a microgap structure based IFPI sensor is fabricated with simple etching and splicing technology. Subsequently, considering the sugar phosphate backbone of DNA, layer-by-layer electrostatic self-assembly technique is adopted to attach the single strand capture DNA to the sensor endface. When the target DNA strand binds to the single-stranded DNA successfully, the optical cavity length of sensor will be increased. Finally, by demodulating the sensor spectrum, DNA hybridization event can be judged qualitatively.This sensor can realize DNA detection without attached label, which save the experiment expense and time. Also the hybridization detection is finished within a few minutes.This quick response feature makes it more attractive in diagnose application. Since the iii sensitivity and specificity are the most widely used statistics to describe a diagnostic test, so these characteristics are used to evaluate this biosensor. Experimental results demonstrate that this sensor has a sensitivity of 6nmol/ml and can identify a 2 bp mismatch. Since this sensor is optical fiber based, it has robust structure and small size ( 125μm ). If extra etching process is applied to the sensor, the size can be further reduced. This promises the sensor potential application of in-cell detection. Further investigation can be focused on the nanofabrication of this DNA sensor, and this is very meaningful topic not only for diagnostic test but also in many other applications such as food industry, environment monitoring.iv Acknowledgement

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Chemical etching of optical fibre tips — experiment and model

Cited by 54 publications

References 27 publications

A reconsideration for forming mechanism of optic fiber probe fabricated by static chemical etching

A reconsideration for forming mechanism of optic fiber probe fabricated by static chemical etching

Laser beam shaping and mode conversion in optical fibers

Microgap Structured Optical Sensor for Fast Label-Free DNA Detection

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