Q. How many different categories are available for the methods of preparing optical glasses?

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Q. What is the first stage in liquid-phase-technique?

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Q. Which processes are involved in the purification stage in liquid-phase-technique?

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Q. At what temperature range, does the melting of multi components glass systems takes place?

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Q. Fiber drawing using preform was useful for the production of graded index fibers.

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Q. The minute perturbations and impurities in the fiber drawing process using preform technique can result in very high losses of _____________

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Q. The liquid-phase melting technique is used for the production of fibers ___________

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Q. Graded index fibers produced by liquid-phase melting techniques are less dispersive than step-index fibers.

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Q. Which of the following is not a technique for fabrication of glass fibers?

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Q. _____________ technique is method of preparing extremely pure optical glasses.

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Q. Which of the following materials is not used as a starting material in vapor-phase deposition technique?

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Q. P₂O₅ is used as a _____________

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Q. How many types of vapor-phase deposition techniques are present?

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Q. ___________ uses flame hydrolysis stems from work on soot processes which were used to prepare the fiber with losses below 20 dB/km.

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Q. Complete the given reaction.

SiCl₄ + 2H₂O → SiO₂ + ______

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Q. In modified chemical vapor deposition, vapor phase reactant such as _________ pass through a hot zone.

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Q. _________ is the stimulation of oxide formation by means of non-isothermal plasma maintained at low pressure in a microwave cavity surrounding the tube.

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Q. Only graded index fibers are made with the help of vapor-phase deposition techniques.

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Q. Modified Chemical Vapor Deposition (MCVD) process is also called as an inside vapor phase oxidation (IVPD) technique.

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Q. Multimode step index fiber has ___________

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