單項(xiàng)選擇題What is an advantage of an externally modulated laser over a directly modulated laser? ()

A. lower cost
B. higher chirp
C. easier to manufacture
D. higher dispersion tolerance
E. higher optical signal-to-noise ratio


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2.單項(xiàng)選擇題Which device creates an OEO conversion? ()

A. amplifier
B. attenuator
C. regenerator
D. light emitter
E. optical switch
F. optical receiver
G. fiber-optic cable

3.單項(xiàng)選擇題What is the difference between the transmitted power and the sensitivity of the receiver? ()

A. OSNR
B. dispersion
C. attenuation
D. power budget
E. amplifier spacing
F. four wave mixing

4.多項(xiàng)選擇題Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems?()

A. PIN photodiodes
B. zero-chirped lasers
C. Erbium-doped fiber amplifiers
D. dispersion compensating fiber
E. dispersion compensating Bragg grating

5.單項(xiàng)選擇題Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?()

A. They are both regions of lowest loss.
B. They are both regions of low reflections.
C. They are both regions of low index of refraction.
D. They are both regions of low chromatic dispersion.
E. They are both regions of low Polarization Mode Dispersion (PMD).

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Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems?()

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Which is a legitimate bandwidth matched pair?()

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Which two can be transported in one AU-4? ()

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In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?()

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How is SNCP and MS-SPRing traffic rerouted during a protection switch when a complete fiber cable cut occurs?()

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SDH Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of().

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For lasers with tightly controlled wavelengths, approximately how far apart are the centers of adjacent wavelengths when 100 GHz spacing is used in a DWDM system? ()

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Click the Exhibit button. Which type of multiplexer is shown in the exhibit?()

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