Q. What is the purpose of wavelength dispersive element is LEC lasers?

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Q. An effective method to reduce the line-width is to make the cavity longer.

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Q. Which devices are used to modulate the external cavity in order to achieve the higher switching speeds?

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Q. How many techniques are used to tune monolithic integrated devices (lasers)?

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Q. _________________ laser can be produced when a coupler section is introduced between the amplifier and phase sections of a structure.

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Q. The rare-earth-doped fiber lasers have spectral line-width in the range of _________________

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Q. The lasing line-width of Fox-smith resonator is ____________________

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Q. What is the widest tuning range obtained in optical fiber laser structure?

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Q. How many techniques can be used to increase the injection cavity length?

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Q. The mechanism which results from a refractive index change in the passive waveguide layer is called as ___________

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Q. How many sections are included in a sampling grating distributed Bragg-reflector laser (SG-DBR)?

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

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Q. The parameters having a major role in determining threshold current of efficiency of injection laser are ___________

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Q. Auger current is mostly ___________________ for material with band gap providing longer wavelength emission.

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Q. Injection lasers operating in smaller wavelengths are subjected to increased carrier losses.

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Q. Devices based on quaternary PbSnSeTe and their ternary compounds, emit at wavelength?

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Q. Replacing Sn with Eu, Cd or Ge in some _________________ the band gap.

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Q. Lasing obtained in __________ when 191 mW of pump light at a wavelength of 0.477 μm is launched into laser.

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Q. The thulium doped fiber laser when pumped with alexandrite laser output at 0.786 μm, the laser emits at ___________

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Q. The diode-cladding-pumped Erbium praseodymium-doped fluoride device operates at wavelength.

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