Axially - And Side - Radiating Optical Fibres For Medical Applications

Russo, V.; Righini, Giancarlo C.; Sottini, S.; Trigari, Silvana

doi:10.1117/12.943748

Cited by 5 publications

(7 citation statements)

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“…By tuning the etching time, we have shown that an appropriate fiber tip could be made to control the beam profile from flat to donut which is often required for some medical applications [37][38][39]. We have applied this beam flattening technique for nerve stimulation [41].…”

Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 96%

“…The LPG and multimode interference based techniques do not meet the high power delivery requirements. Compared to currently-used modified tips [37][38][39], concave tip fibers have several advantages such as precise control of beam size, high transmission efficiency, uniform intensity distribution, and low cost of fabrication process. In some practical applications, a flat beam might be needed at a given distance from the fiber end face.…”

Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 99%

“…There are several methods to deliver a donut beam directly from the fiber to the surface such as integrated optical fiber with scattering tips or micro-lenses [37][38][39], all-fiber LPG [10] and multimode interference devices [40]. The LPG and multimode interference based techniques do not meet the high power delivery requirements.…”

Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 99%

“…Donut shape intensity distribution is particularly useful for medical application for treatment of the interior of hollow body organs [37][38][39]. There are several methods to deliver a donut beam directly from the fiber to the surface such as integrated optical fiber with scattering tips or micro-lenses [37][38][39], all-fiber LPG [10] and multimode interference devices [40].…”

Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 99%

See 3 more Smart Citations

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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Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 96%

Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 99%

Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 99%

Section: Beam Shaping Using Concave Tip Multimode Fibermentioning

confidence: 99%

See 2 more Smart Citations

Laser beam shaping and mode conversion in optical fibers

Mayeh

Farahi

2011

Photonic Sens

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“…Previous research on biomedical engineering applications has focused on the delivery of laser light through optical fibres with various tip geometries [3][4][5][6][7][8][9][10][11]. Optical fibre endoscopes with flat tip geometry are constrained to forward firing in tissue removal procedures unless the fibre tip is curved by specially designed distal end attachments.…”

Section: Introductionmentioning

confidence: 99%

Goniometric characteristics of optical fibres for temperature measurement in diesel engine exhaust filters

Boothe

Shih

Kong

et al. 2003

Meas. Sci. Technol.

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The accurate in situ, non-contact measurement of the temperature distribution within diesel after-treatment filters requires the employment of optical fibres with special tip geometry. The goniometric characteristics of optical fibres with flat, 45 • angled and bent and polished tips are studied such that the specific radiation acceptance region can be determined. One 2 mm diameter fused silica and two 0.425 mm diameter sapphire optical fibres are examined. Detailed discussion of the relative intensity profiles observed for these fibres is presented. Of the three fibres evaluated, the 45 • angled tip geometry provides the most precise response for measuring radiation emitted from the internal filter walls. Exploiting the characteristics of total internal reflection, the 45 • angled tip fibre accepts the maximum quantity of incident radiation at an angle perpendicular to the optical axis.

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Optical fibre delivery systems for laser angioplasty and laser treatment of tumours

Russo

1988

Laser Med Sci

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Axially - And Side - Radiating Optical Fibres For Medical Applications

Cited by 5 publications

References 0 publications

Laser beam shaping and mode conversion in optical fibers

Laser beam shaping and mode conversion in optical fibers

Goniometric characteristics of optical fibres for temperature measurement in diesel engine exhaust filters

Optical fibre delivery systems for laser angioplasty and laser treatment of tumours

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