A film waveguide (nf=2.20) is deposited on a substrate with ns=1.50 to form a slab waveguide. The guide is operated in air and TE modes excited with a laser with 1300 nm wavelength. Find the maximum thickness that allows only 3 modes to propagate.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero