Biophotonics_Concepts_to_Applications
where the parameter m≥0 designates the number of rings. Given that the diameter of an individualfiber is Dfiber, then the outer ...
(b) From Example7.3b, the radius of the bundle is 375/2μm = 187.5μm. Then the total cross sectional area of the bundle is Total ...
fiber axis, as shown in Fig.7.9a. This end face will distribute the light emerging from thefiber in a circular pattern, which is ...
dental diseases, and intracavity or superficial tumors in arteries or veins, in the esophagus, in gastrointestinal tracts, in ur ...
7.4 Optical Sensors A biophotonics detection process can involve the sensing of perturbations in a transmitted optical signal ca ...
pathogens such as bacteria and viruses. The biorecognition material is referred to as areceptor, which has the characteristic to ...
is based on observing thefluorescence emitted from a detection antibody that binds to an absorbed antigen [ 3 ]. The key operati ...
second movablefiber that is located an axial distancesfrom thefixedfiber [ 3 ]. The secondfiber can move axially due to a variat ...
For a 0.020-mm = 20-μm gap Lgap¼10 log 25 25 þ20 tan 14 2 ¼ 1 :580 dB For a 0.025-mm = 25-μm gap Lgap¼10 log 25 25 þ25 tan ...
Example 7.8 Consider a step-indexfibers with a 25-μm core radius and an acceptance angle of 14° in the reflective sensor shown i ...
external force on one or both of the plates varies due to changes in factors such as pressure, temperature, or stress, the bend ...
[Note: 1 dyne = 10−^5 N; 1 Pa (Pa) = 1 N/m^2 =10^5 dyne/10^4 cm^2 =10 dyne/cm^2 ]. For comparison purposes, atmospheric pressure ...
7.5.1 Mach-Zehnder Interferometer. Owing to their versatile setup configurations, Mach-Zehnder interferometers are popular for d ...
resulting observed constructive and destructive interference patterns at the sensor output then allow an assessment of the exter ...
7.5.2 Michelson Interferometer A Michelson Interferometer (MI) is similar to an MZI and is widely used for optical coherence tom ...
d¼ðÞnsnairL ð 7 : 10 Þ where L is the thickness of the tissue and nairis the refractive index of air. Example 7.10 Consider a t ...
Measuring the difference in transmissivity through the two directions of optical signal rotation is an alternative use of a Sagn ...
setup illustrated in Fig.7.20. Here a short length of PCF is sandwiched between input and output SMFs (such as the conventional ...
7.7 Fiber Bragg Grating Sensors A highly successful precise wavelength selection component is afiber Bragg grating (FBG). As Sec ...
application, a mattress pad or a chair cushion can have a series of embedded FBG sensors with different Bragg wavelengths cascad ...
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