Podcast
Questions and Answers
What is the formula for group velocity and phase velocity?
What is the formula for group velocity and phase velocity?
- $v_g = c/\sqrt{1 - (2a)}$, $v_p = c/\sqrt{1 - (fc)}$
- $v_g = c\sqrt{1 - (2a)}$, $v_p = c\sqrt{1 - (fc)}$
- $v_g = c/2$, $v_p = f^2$
- $v_g = c$, $v_p = f\lambda$ (correct)
What does the cutoff frequency represent in waveguide theory?
What does the cutoff frequency represent in waveguide theory?
- The frequency at which the phase velocity equals the speed of light.
- The frequency at which the group velocity becomes half of the speed of light.
- The frequency at which no higher modes can propagate through the waveguide. (correct)
- The frequency at which light enters the waveguide.
What is the characteristic impedance of a waveguide?
What is the characteristic impedance of a waveguide?
- $377 \sqrt{1-(fc)}$ (correct)
- $377\sqrt{1-( \lambda ) / 2a}$
- $377 / 2 \sqrt{1-(fc)}$
- $377 / 2 \sqrt{1-( \lambda ) / 2a}$
What are the key components of an optical fiber?
What are the key components of an optical fiber?
In optical fiber systems, what type of transmission is more common?
In optical fiber systems, what type of transmission is more common?
In which band do optical fiber systems generally operate?
In which band do optical fiber systems generally operate?
What is the velocity factor?
What is the velocity factor?
What is the characteristic impedance (Zo) of an infinitely long transmission line at radio frequencies?
What is the characteristic impedance (Zo) of an infinitely long transmission line at radio frequencies?
What type of transmission line is described as nonresonant?
What type of transmission line is described as nonresonant?
What is the relationship between voltage and current at any point along a nonresonant transmission line?
What is the relationship between voltage and current at any point along a nonresonant transmission line?
What is the propagation delay in networking applications?
What is the propagation delay in networking applications?
Which statement about line losses on a nonresonant transmission line is true?
Which statement about line losses on a nonresonant transmission line is true?
What advantage do laser diodes have over LEDs in terms of light production?
What advantage do laser diodes have over LEDs in terms of light production?
Why are laser diodes more difficult to operate compared to LEDs?
Why are laser diodes more difficult to operate compared to LEDs?
How are lasers usually modulated?
How are lasers usually modulated?
Which of the following is true about single-mode fiber?
Which of the following is true about single-mode fiber?
Which type of practical light detector is commonly used in fiberoptic communications receivers?
Which type of practical light detector is commonly used in fiberoptic communications receivers?
What is the advantage of multimode graded index fiber over multimode step index fiber?
What is the advantage of multimode graded index fiber over multimode step index fiber?
Which type of fiber optic cable has higher order modes?
Which type of fiber optic cable has higher order modes?
What determines the responsivity of an optical detector?
What determines the responsivity of an optical detector?
What materials are commonly used in optical detectors for different wavelengths in fiberoptic communications?
What materials are commonly used in optical detectors for different wavelengths in fiberoptic communications?
Which component of a fiber optic system is typically more expensive for multimode fiber compared to single-mode fiber?
Which component of a fiber optic system is typically more expensive for multimode fiber compared to single-mode fiber?
What is the primary cause of higher attenuation in multimode fibers compared to single-mode fibers?
What is the primary cause of higher attenuation in multimode fibers compared to single-mode fibers?
Which factor does the attenuation of light through glass depend on?
Which factor does the attenuation of light through glass depend on?
Which of the following is NOT a typical loss in optical fiber links?
Which of the following is NOT a typical loss in optical fiber links?
What is the purpose of a link budget calculation in fiber optic communication systems?
What is the purpose of a link budget calculation in fiber optic communication systems?
Which of the following losses is NOT included in a link budget calculation?
Which of the following losses is NOT included in a link budget calculation?
What is the term used to describe the excess power remaining after accounting for all losses in a link budget calculation?
What is the term used to describe the excess power remaining after accounting for all losses in a link budget calculation?
Which of the following is NOT a type of FTTX architecture mentioned in the text?
Which of the following is NOT a type of FTTX architecture mentioned in the text?
What is the simplest way to prepare a loss budget, according to the text?
What is the simplest way to prepare a loss budget, according to the text?
