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Intermodal dispersion occurring in a large amount in multimode step index fiber results in . . . . . . . .

A

Propagation of the fiber

B

Propagating through the fiber

C

Pulse broadening at output

D

Attenuation of waves

Correct Answer: Pulse broadening at output

Intermodal dispersion occurring in a large amount in multimode step index fiber results in ____________

A

Propagation of the fiber

B

Propagating through the fiber

C

Pulse broadening at output

D

Attenuation of waves

A multimode step-index fiber has a core refractive index of 1.5 and relative refractive index difference of 1%. The length of the optical link is 6 km. Estimate the RMS pulse broadening due to intermodal dispersion on the link.

A

92.6 ns

B

86.7 ns

C

69.3 ns

D

68.32 ns

Estimate RMS pulse broadening per km due to intermodal dispersion for multimode step index fiber where length of fiber is 4 km and pulse broadening per km is 80.6 ns.

A

18.23ns/km

B

20.15ns/km

C

26.93ns/km

D

10.23ns/km

An electronic device rearranges numbers step-by-step in a particular order according to set of rules. The device stops when the final result is obtained.
Input: 84 15 35 04 18 96 62 08
Step 1: 96 84 15 35 04 18 62 08
Step 2: 96 84 62 15 35 04 18 08
Step 3: 96 84 62 35 15 04 18 08
Step 4: 96 84 62 35 18 15 04 08
Step 5: 96 84 62 35 18 15 08 04
And Step 5 is the last step for this input. Now, find out an appropriate step in the following question following the above rule. Question:
Input: 16 09 24 28 15 04
What will be the third step for this input ?

A

28 24 15 16 04 09

B

28 24 16 15 09 04

C

24 28 15 16 09 04

D

28 24 16 15 04 09

A multimode step index fiber has source of RMS spectral width of 60nm and dispersion parameter for fiber is 150psnm-1km-1. Estimate rms pulse broadening due to material dispersion.

A

12.5ns km-1

B

9.6ns km-1

C

9.0ns km-1

D

10.2ns km-1

A multimode step index fiber has source of RMS spectral width of 60nm and dispersion parameter for fiber is 150psnm^-1km^-1. Estimate rms pulse broadening due to material dispersion.

A

12.5ns km<sup>-1</sup>

B

9.6ns km<sup>-1</sup>

C

9.0ns km<sup>-1</sup>

D

10.2ns km<sup>-1</sup>

An electronic device when fed with the numbers, rearranges them in a particular order following certain rules. The following is a step-by-step process of rearrangement for the given input of numbers. Input :- 85 16 36 04 19 97 63 09 Step I :- 97 85 16 36 04 19 63 09 Step II :- 97 85 63 16 36 04 19 09 Step III :- 97 85 63 36 16 04 19 09 Step IV :- 97 85 63 36 19 16 04 09 Step V :- 97 85 63 36 19 16 09 04 (for the given input step V is the last step). Which of the following will be the last step for the given input ? Input :- 03 31 43 22 11 09

A

IV

B

V

C

VI

D

None of these

A multimode fiber has RMS pulse broadening per km of 12ns/km and 28ns/km due to material dispersion and intermodal dispersion resp. Find the total RMS pulse broadening.

A

30.46ns/km

B

31.23ns/km

C

28.12ns/km

D

26.10ns/km

A 4 km optical link consists of multimode step index fiber with core refractive index of 1.3 and a relative refractive index difference of 1%. Find the delay difference between the slowest and fastest modes at the fiber output.

A

0.173 μsec

B

0.152 μsec

C

0.96 μsec

D

0.121 μsec

A single-mode step-index fiber or multimode step-index fiber allows propagation of only one transverse electromagnetic wave.

A

True

B

False