Q. The behavior of laser occurring when current is increased above threshold particularly is?

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Q. ____________________ lasers are presently the major laser source for optical fiber communications.

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Q. In Nd: YAG lasers, the maximum doping levels of neodymium is ____________

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Q. Which of the following is not a property of Nd: YAG laser that enables its use as an optical fiber communication source?

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Q. The Nd: YAG laser has a narrow line-width which is ________________

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Q. The strongest pumping bands is a four level system of Nd: YAG laser at wavelength of range_________________

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Q. The Nd: YAG laser is costlier than earth-doped glass fiber laser.

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Q. It is a resonant cavity formed by two parallel reflecting mirrors separated by a mirror separated by a medium such as air or gas is?

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Q. In a three level system, the threshold power decreases inversely with the length of the fiber gain medium.

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Q. Which of the following co-dopant is not employed by neodymium and erbium doped silica fiber lasers?

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Q. Dopants levels in glass fiber lasers are generally ___________

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Q. _______________ fibers include addition of lead fluoride to the core glass in order to raise the relative refractive index.

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Q. The lasing output of the basic Fabry-perot cavity fiber is restricted to between ____________

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Q. In Fabry-perot laser, the lower threshold is obtained by ___________

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Q. When did the non-semiconductor laser developed?

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Q. Y₃Al₁₅O₁₂ is a molecular formula for _____________

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Q. Which of these factors are critical in affecting the system performance in the case of coherent optical fiber transmission?

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Q. _______________ occurs as a result of the change in lasing frequency with gain.

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Q. Laser cavity length can be extended by ___________

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

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