Biophotonics_Concepts_to_Applications
the relative spot size w 0 /a, with an accuracy better than 1 % for a SMF, is given by [ 6 ] w 0 a ¼ 0 : 65 þ 1 :619V^3 =^2 þ 2 ...
D¼ n^21 n^22 2n^21 n 1 n 2 n 1 ð 3 : 11 Þ The approximation on the right-hand side reduces this expression forΔto that of th ...
Solution: First, from Eq. (3.4) V¼ 2 pa k NA¼ 2 p 25 lm 1 : 31 lm 0 : 22 ¼ 26 : 4 Then from Eq. (3.14) the total number of mo ...
attenuation is measured in units of decibels per kilometer (dB/km) or decibels per meter (dB/m). Recall that Sect.1.4gives a dis ...
and the molecular composition of a liquid or gas surrounding thefiber. Operational details and examples of these biosensor appli ...
1500 nm. As shown in Fig.3.6, these attenuation mechanisms produce a low-loss region in silicafibers in the spectral range of 70 ...
Incorporation of such features into an opticalfiber is achieved through either material or structural variations [ 5 ]. For biop ...
As described in Chap. 7 , an important biophotonics application of a FBG is to sense a variation in a physical parameter such as ...
However, currently special material processing methods, such asfluorine doping of silica, have resulted infibers with moderate ( ...
opticalfibers in such indoor installations must tolerate numerous sharp bends, These same fibers also can be used for medical ap ...
propagating along thefiber is a linear superposition of these two polarization modes and depends on the polarization of the ligh ...
axes in the core. Each of these axes will guide light at a different velocity. Crosstalk between the two axes is suppressed so t ...
3.7 Hard-Clad Silica Fibers. A hard-clad silica (HCS) opticalfiber is a MMF structure consisting of a silica glass core that is ...
OH content for operation in the UV, visible, and near-IR regions. The mechanical, optical, and structural properties of HCSfiber ...
end (the light exit end) of thefiber have been proposed and demonstrated by using a fusing and polishing technique [ 27 ]. Examp ...
This structural arrangement creates an internal microstructure, which offers another dimension of light control in thefiber comp ...
improvement in the performance of biosensors, because it results in a stronger optical coupling between a light signal and the s ...
assumed that the side-emitting effect is much stronger than light absorption and other losses in thefiber, then the side-glowing ...
materials that transmit light from ultra-violet to mid-IR without any absorption peak. Commercial HMFGfibers include InF 3 (with ...
Polycrystalline silver-halidefiberswith AgBr cores and AgCl claddings have shown to have excellent crystalline IRfiber propertie ...
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