Bending losses of coated single-mode optical fibers

Loss of optical power in a single-mode optical fibre due to bending has been investigated for a wavelength of 1550 nm. In this experiment, the effects of bending radius (4-15 mm, with steps of 1 mm), and wrapping turns (up to 40 turns) on loss have been studied. Twisting the optical fibre and its influence on power loss also have been investigated.Variations of bending loss with these two parameters have been measured, loss with number of turns and radius of curvature have been measured, and with the help of computer curve fitting method, semi-empirical relationships between bending loss and these two parameters have been found, which show good agreement with the obtained experimental results.

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“…This bending loss in coated optical fibres has been investigated by means of numerical methods based on wave optics [15].…”

Section: Theorymentioning

confidence: 99%

Investigation of bending loss in a single-mode optical fibre

et al. 2010

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“…In 1978, H. Murakami et al [7] briefly investigated the bending loss behavior of a bent singlemode fiber, from which the coating had been stripped when the fiber was immersed in a liquid. They found that the bend loss varied with the refractive index of the liquid.…”

Section: Modeling and Experimental Verification Of A Bare Bending Fibmentioning

confidence: 99%

Macrobending single-mode fiber-based refractometer

Wang¹,

Semenova²,

Wu³

et al. 2009

Appl. Opt.

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“…Thin dotted lines are least square fits to an empirical loss formula for the LP 01 mode where the bending loss in dB/m is given by loss [in dB/m] F expðK 1 À K 2 D= 3 Þ and where D is the bending diameter and 6 is the wavelength [6]. The ripples in the measured bending loss were caused by light reflected from the cladding interface to the primary coating [2,3,4]. The ripple peak shifts according to the winding number as seen in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…When the bending loss of the LP 11 mode in TMF is insufficiently large to reduce the LP 11 mode power to a negligible value with a small number of windings, we proposed performing three consecutive power measurements with different winding numbers to estimate the mode excitation ratio. It has been shown that the finite dimensions of the cladding and the presence of a resin coating causes fluctuations in macro bending loss versus both wavelength and bending radius [2,3,4]. The macro bending loss also varies with lateral pressure applied to bent fibers.…”

Section: Introductionmentioning

confidence: 99%