Description : Give two reasons why optical fiber manufacturers depart from the traditional circular core and cladding, low-loss glass fiber design?
Last Answer : To increase performance and reduce cost
Description : In single mode operation, the value of the normalized frequency (V) should remain near the 2.405 level. If the value of V is less than 1, do single mode fibers carry a majority of the power in the core or cladding material?
Last Answer : Cladding material.
Description : Which fiber cladding, matched or depressed, consists of two regions?
Last Answer : Depressed.
Description : Multimode step-index fibers have a core and cladding of constant refractive index n1 and n2, respectively. Which refractive index, the core or cladding, is lower?
Last Answer : Cladding.
Description : Explain the difference between multimode and single mode core-cladding concentricity errors.
Last Answer : Multimode core-cladding concentricity error is the distance between the core and cladding centers expressed as a percentage of core diameter while the single mode core-cladding concentricity error is just the distance between the core and cladding centers
Description : As the core and cladding modes travel along the fiber, mode coupling occurs. What is mode coupling?
Last Answer : Mode coupling is the exchange of power between two modes.
Description : How many modes possible with a multimode step-index with a core diameter of 50 um, a core refractive index of 1.6, a cladding refractive index of 1.584, and a wavelength of 1300 nm. ∙ A. 456 ∙ B. 213 ∙ C. 145 ∙ D. 372
Last Answer : D. 372
Description : What is cladding ?
Last Answer : : Cladding is a piece of optical fiber made of glass or plastic.
Description : The core of a fiber optic is surrounded by a. Wire braid shield b. Kevlar c. Cladding d. Plastic insulation
Last Answer : c. Cladding
Description : The inner portion of the fiber cable is called a. Cladding b. Coating c. Inner conductor d. Core
Last Answer : d. Core
Description : The core of an optical fiber has a a. Lower refracted index than air b. Lower refractive index than the cladding c. Higher refractive index than the cladding d. Similar refractive index with the cladding
Last Answer : c. Higher refractive index than the cladding
Description : The core of the optical fiber has ______. A. A medium index of refraction B. A lower index of refraction than the cladding C. A lower index of refraction than air D. A higher index of refraction than the cladding
Last Answer : D. A higher index of refraction than the cladding
Description : ECE Board Exam March 1996 That dielectric material of an optical fiber surrounding the core A. Cladding B. Armor C. Shield D. Cover
Last Answer : A. Cladding
Description : Which of the following is not used as a nuclear fuel cladding material? (A) Zircaloy (B) Cadmium (C) Ceramics (D) Stainless steel
Last Answer : (B) Cadmium
Description : Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium (A) Tin, nickel, iron and chromium (B) And graphite
Last Answer : (A) Tin, nickel, iron and chromium
Description : ______ cables arecomposed ofa glass or plastic inner core surrounded by cladding, allencasedin an outside jacket. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Fiber-optic
Description : In an optical fiber, the inner coreis _______ the cladding. A) denser than B) less dense than C) the samedensityas D) another name for
Last Answer : denser than
Description : The core refractive index should be lesser than the cladding refractive index for a coaxial cable. State True/False a) True b) False
Last Answer : b) False
Description : The numerical aperture of a coaxial cable with core and cladding indices given by 2.33 and 1.4 respectively is a) 3.73 b) 0.83 c) 3.46 d) 1.86
Last Answer : d) 1.86
Description : ……cables are composed of a glass or plastic inner core surrounded by cladding,all encased in an outside jacket. a. Fiber-optic b. Coaxial c. Shield Twisted Pair d. Unshield Twisted-pair
Last Answer : a. Fiber-optic
Description : The core of fiber-optic cable is surrounded by ∙ A. wire braid shield ∙ B. Keviar ∙ C. cladding ∙ D. plastic insulation
Last Answer : ∙ C. cladding
Description : Type of bend that occurs as a result of differences in thermal contraction rates between the core and the cladding material. ∙ A. Macrobending ∙ B. Microbending ∙ C. Quad bending ∙ D. Constant-radius bending
Last Answer : B. Microbending
Description : A type of index of an optical fiber that has no cladding and whose central core has a non-uniform refractive index. ∙ A. graded index ∙ B. multimode ∙ C. single mode ∙ D. step-index
Last Answer : ∙ A. graded index
Description : A type of index profile of an optical fiber that has a central core and outside cladding with a uniform refractive index ∙ A. multimode ∙ B. graded index ∙ C. step-index ∙ D. single mode
Last Answer : ∙ C. step-index
Description : What phenomenon will result if the glass fiber is exposed to long periods of high humidity? ∙ A. stress fatigue ∙ B. core corrosion ∙ C. stress corrosion ∙ D. cladding corrosion
Last Answer : stress corrosion
Description : The three essential types of fiber commonly used today except: ∙ A. Plastic core and cladding ∙ B. Plastic core and glass cladding ∙ C. Glass core and glass cladding (SCS) ∙ D. Glass core and plastic cladding (PCS)
Last Answer : B. Plastic core and glass cladding
Description : ____ is applied to protect core and cladding of the fiber ∙ a. Insulation ∙ b. Fiber insulation ∙ c. Silica ∙ d. Polymer jacket
Last Answer : d. Polymer jacket
Description : Optical fibers for telecommunications are typically about _____ mils thick and consists of a glass core, a glass cladding of lower index of refraction, and a protective coating ∙ a. 5 ∙ b. 6 ∙ c. 7 ∙ d. 8
Last Answer : ∙ a. 5
Description : In fiber optics, higher-order mode refers to ∙ a. Cladding boundary at high angle ∙ b. Backscattering electromagnetic signals ∙ c. Diffracting signals ∙ d. All of these
Last Answer : ∙ a. Cladding boundary at high angle
Description : The core of a fiber optic is surrounded by ∙ a. Wire braid shield ∙ b. Kevlar ∙ c. Cladding ∙ d. Plastic insulation
Last Answer : ∙ c. Cladding
Description : The inner portion of the fiber cable is called ∙ a. Cladding ∙ b. Coating ∙ c. Inner conductor ∙ d. Core
Last Answer : ∙ d. Core
Description : The core of an optical fiber has a ∙ a. Lower refracted index than air ∙ b. Lower refractive index than the cladding ∙ c. Higher refractive index than the cladding ∙ d. Similar refractive index with the cladding
Description : Compared to the core, the index of refraction of the cladding must be: a. the same b. greater c. less d. doesn’t have an index of refraction
Last Answer : c. less
Description : Type of bend that occurs as a result of differences in thermal contraction rates between the core and the cladding material.
Last Answer : Microbending
Description : They are preferred as wall treatment because of wide variety of designs & colours creating an illusionary impression. a. Glass b. wall paper c. Cladding d. Painting
Last Answer : b. wall paper
Description : How alloy steel is prepared by cladding mechanism ?
Last Answer : Cladding mechanism: Cladding is the bonding together of dissimilar metals. It is different from fusion welding or gluing as a method to fasten the metals together. Cladding is often achieved by extruding two ... polymer). Built part is free of crack and porosity. Compact technology.
Description : What is wall cladding?
Last Answer : Wall Cladding or tiling is a process of finishing the surface with tiles. Due to wall cladding, walls are easy to clean. It protects the exterior surface of building from atmospheric agents.
Description : Write two application of metal cladding process.
Last Answer : Applications : 1) Al clad sheets used in aircraft industry in which a plate of duralumin is sandwiched between two layers of 99.5% pure Al. 2) Cu clad steel wire is obtained by ... cu-tube is used for electrical conductors possessing combining strength of steel with the high conductivity of Cu.
Description : Why metal cladding is done on plane surfaces only?
Last Answer : The process of metal cladding involves bonding firmly and permanently, a dense homogenous layer of a coating metal to the base metal on one or both sides. In this process base metal is sandwiched or ... cell action in presence of moisture. Hence the metal cladding can be done only on plain surfaces.
Description : Explain metal cladding with labeled diagram.
Last Answer : Method : Metal cladding Process : i) Base metal is sandwiched or cladded between the two sheets of coating metal. ii) This sandwich is then passed through two heavy rollers maintained at high temp & ... Ni alloys, Cu & pb alloys & Pb alloys are used as cladding materials.
Description : How are source-to-fiber coupling and microbending and macrobending losses affected by changes in core diameter and D?
Last Answer : Coupling efficiency increases with both core diameter and D, while bending losses increase directly with core diameter and inversely with D.
Description : Will fiber coupling loss generally increase or decrease if the mode field diameter of a single mode fiber is decreased?
Last Answer : Increase.
Description : How is the core diameter defined?
Last Answer : The core diameter is defined as the diameter at which the near field intensity is 2.5 percent of the maximum intensity.
Description : Calculate the diameter in MILS of a conductor that has a diameter of 0.375 inch.
Last Answer : 375 mils (move the decimal three places to the right).
Description : Define the metal solvent action that takes place when copper conductors are soldered together.
Last Answer : The solder dissolves a small amount of the copper, which combines with the solder forming a new alloy; therefore, the joint is one common metal.
Description : Define thermal inertia.
Last Answer : The capacity of the soldering iron to generate and maintain a satisfactory soldering temperature while giving up heat to the joint being soldered.
Description : Define the term "torque."
Last Answer : A measure of how much load a machine can turn.
Description : Define matter and list its three different states.
Last Answer : Anything that occupies space and has weight. Solid, liquid, and gas.
Description : Define the term negative temperature coefficient.
Last Answer : It is the decrease in a semiconductor’s resistance as temperature rises.
Description : Define a fiber optic splice.
Last Answer : A permanent fiber joint whose purpose is to establish an optical connection between two individual optical fibers.