Optical Communication Task 2: NA Calculation

Condition 1: d=10 micrometer, wavelength=850 nm, NA 1-100 %

As it is seen from the chart, we have single mode condition until NA=61%

Condition 2: d=10 micrometer, wavelength=1300 nm, NA 1-99 %

 

As it is seen from the chart, we have single mode condition until NA=100%

Condition 3: d=10 micrometer, wavelength=1550 nm, NA 1-100 %

 

As it is seen from the chart, we can never have the multi mode condition because the highest V value is below 2.405