Linewidth and Wavelength MCQ

Test your knowledge with important Linewidth and Wavelength MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Linewidth and Wavelength MCQs on Bissoy. Bissoy App

• Fiber based lasers provide diffraction-limited power at higher levels than solid-state laser.
  ক

  True

  খ

  False
• How many sections are included in a sampling grating distributed Bragg-reflector laser (SG-DBR)?
  ক

  Four

  খ

  Five

  গ

  Three

  ঘ

  Two
• The mechanism which results from a refractive index change in the passive waveguide layer is called as ___________
  ক

  Absorption

  খ

  Spontaneous emission

  গ

  Monolithic inversion

  ঘ

  Bragg wavelength control
• How many techniques can be used to increase the injection cavity length?
  ক

  One

  খ

  Two

  গ

  Three

  ঘ

  Four
• What is the widest tuning range obtained in optical fiber laser structure?
  ক

  60 nm

  খ

  80 nm

  গ

  More than 100 nm

  ঘ

  100 nm
• The lasing line-width of Fox-smith resonator is ____________________
  ক

  Less than 1 MHz

  খ

  1 MHz

  গ

  2 MHz

  ঘ

  Greater than 3 MHz
• The rare-earth-doped fiber lasers have spectral line-width in the range of _________________
  ক

  0.1 to 1 nm

  খ

  1.2 to 1.5 nm

  গ

  6 to 10 nm

  ঘ

  2 to 2.3 nm
• _________________ laser can be produced when a coupler section is introduced between the amplifier and phase sections of a structure.
  ক

  SG-DBR

  খ

  GCSR

  গ

  Y 4-shifted

  ঘ

  DSM
• How many techniques are used to tune monolithic integrated devices (lasers)?
  ক

  Five

  খ

  One

  গ

  Two

  ঘ

  Three
• Which devices are used to modulate the external cavity in order to achieve the higher switching speeds?
  ক

  Electromagnetic

  খ

  Acousto-optic

  গ

  Dispersive

  ঘ

  Lead
• An effective method to reduce the line-width is to make the cavity longer.
  ক

  True

  খ

  False
• What is the purpose of wavelength dispersive element is LEC lasers?
  ক

  Wavelength selectivity

  খ

  Reduction of line-width

  গ

  Frequency multiplication

  ঘ

  Avalanche multiplication
• Laser cavity length can be extended by ___________
  ক

  Increasing the refractive index

  খ

  Reducing frequency

  গ

  Introduction of external feedback

  ঘ

  Using GRIN-rod lenses
• _______________ occurs as a result of the change in lasing frequency with gain.
  ক

  Frequency multiplication

  খ

  Dispersion

  গ

  Attenuation

  ঘ

  Line-width broadening
• Which of these factors are critical in affecting the system performance in the case of coherent optical fiber transmission?
  ক

  Laser line-width and stability

  খ

  Refractive index and index difference

  গ

  Core cladding diameter

  ঘ

  Frequency