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  3. 2 consider the propagation of a laser of wavelength ...

Question: 2 consider the propagation of a laser of wavelength ...

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2. Consider the propagation of a laser of wavelength λ 500 nm in a glass fiber of refractive index n-1.5; the diameter of the fiber is 5 μm . Assuming that the laser power (1 Watt) is uniformly distributed inside the fiber, calculate the magnitude of the laser intensity I (in Watts/m2) and its electric field strength E (in Volts/m) inside the fiber. Note: You can assume that the glass permeability μ-10 (the vacuum permeability), so that you can calculate εfrom n-E/6)12 ln order to calculate η = (με)12 that appears in the expression linking the laser intensity I with the optical electric field E amplitude l-E2/2 η. In vacuum, η (μ VE )2 377 ohm, the free space impedance with 8.85x102 F/m and μ 4 Tox 10 H/m.

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