question archive Please provide Handwritten answer An optical fiber (circular waveguide) has a chromatic dispersion coefficient Dch = -30 ps/(km nm) at a wavelength of 900 nm
Please provide Handwritten answer An optical fiber (circular waveguide) has a chromatic dispersion coefficient Dch = -30 ps/(km nm) at a wavelength of 900 nm
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Please provide Handwritten answer
An optical fiber (circular waveguide) has a chromatic dispersion coefficient Dch = -30 ps/(km nm) at a wavelength of 900 nm. A source with a central wavelength of 900 nm has a FWHM spectral width of 80 nm, sends a pulse thru the fiber. The rms value of the intermodal dispersion is intermodal = 50 ps/km. a. Assume the shape of the light pulse is Gaussian. What is the rms pulse spreading per kilometer due to chromatic dispersion (intramodal)? Cintramodal = ps/km (pico sec per km) b. Assume the shape of the light pulse is Gaussian. What is the maximum bit rate x distance product for a return to zero (RZ) bit rate? BL = x 10 bits km (Mb/(sec km) c) What is the optical and electrical bandwidths for a 10 km distance of fiber? fop = x 106 Hz (Mega Hz) fel = x 106 Hz (Mega Hz)
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a) RMS spread value = 34
b) BL = 24.5
c)Fop = 55.8 MHz
Fel = 38.6 MHz
Step-by-step explanation
a) RMS spread value = 34
b) BL = 24.5
c)Fop = 55.8 MHz
Fel = 38.6 MHz
EXPLAINATION :
RMS value spreading per kilo meter is given by
0.425 * FWHM = 0.425 * 80 = 34
BL = 0.25/ RMS spread value * Dch =0.25/ 34 * 30 = 0.25 / 1020 = 24.5
Fop = 0.19 * 340(l * rms spread value) = 55.8 MHz
Fel = 0.71 * Fop = 38.6 MHz
