Description : For efficient operation, should a detector have a high or low responsivity at the operating wavelength?
Last Answer : High.
Description : The minimum optical power a light detector can receive and still produce a usable electrical output signal. ∙ A. light responsivity ∙ B. light sensitivity ∙ C. light collectivity ∙ D. illumination
Last Answer : B. light sensitivity
Description : The term responsivity as it applies to a light detector is best described as ∙ A. the time required for the signal to go from 10 to 90 percent of maximum amplitude ∙ B. the ratio of the diode ... . the ratio of the input power to output power ∙ D. the ratio of output current to input current
Last Answer : the ratio of the diode output current to the input optical power
Description : A measure of conversion efficiency of a photodetector. ∙ A. Efficiency ∙ B. Responsivity ∙ C. Dark current ∙ D. Spectral response
Last Answer : B. Responsivity
Description : For a light detector, responsivity is measured in: a. amps per watt b. µW per amp c. mA per joule d. µsec per µW
Last Answer : a. amps per watt
Description : The term responsivity as it applies to a light detector is best described as.
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.
Description : Define the loss in optical power through a connection.
Last Answer : loss = 10log
Description : Semiconductor LEDs emit incoherent light. Define incoherent light
Last Answer : Light waves that lack a fixed-phase relationship
Description : Define receiver dynamic range.
Last Answer : The range of optical power levels over which the receiver operates within the specified values. It
Description : List the key operational parameters used to define receiver performance.
Last Answer : Receiver sensitivity, bandwidth, and dynamic range.
Description : Define mutual inductance.
Last Answer : Mutual inductance is the property existing between two coils so positioned that flux from one coil cuts the windings of the other coil.
Description : Define inductancanc
Last Answer : Inductance is the property of a coil (or circuit) which opposes any CHANGE in current.
Description : Define baud.
Last Answer : A unit of modulation rate.
Description : Define cladding diameter.
Last Answer : The cladding diameter is the average diameter of the cladding.
Description : Define modulation.
Last Answer : The process of varying one or more characteristics of an optical signal to encode and convey information.
Description : Extrinsic (OH) absorption peaks define three regions or windows of preferred operation. List the three windows of operation.
Last Answer : The first, second, and third windows of operation are 850 nm, 1300 nm, and 1550 nm, respectively.
Description : Define attenuation.
Last Answer : Attenuation is the loss of optical power as light travels along the fiber.
Description : Skew rays and meridional rays define different acceptance angles. Which acceptance angle is larger, the skew ray angle or the meridional ray angle?
Last Answer : Skew ray angle.
Description : Two methods describe how light propagates along an optical fiber. These methods define two theories of light propagation. What do we call these two theories?
Last Answer : The ray theory and the mode theory.
Description : Define dielectric strength.
Last Answer : The ability of the insulation material to withstand potential difference.
Description : Define the temperature coefficient of resistance.
Last Answer : The amount of increase in the resistance of a 1-ohm sample of the conductor per degree of temperature rise above 0º C
Description : Define specific resistance.
Last Answer : The resistance of a unit volume of a substance.
Description : Define a circular mil.
Last Answer : The cross-sectional area of a circular conductor with a diameter of 1 mil.
Description : Define a square mil as it relates to a square conductor
Last Answer : The cross-sectional area of a square conductor with a side of 1 mil.
Description : Define a mil-foot.
Last Answer : A circular conductor with a diameter of 1 mil and a length of 1 foot.
Description : Define insulation resistance.
Last Answer : The resistance to current leakage through the insulation.
Description : Define alternating current.
Last Answer : An electrical current which is constantly varying in amplitude, and which changes direction at regular intervals.
Description : Define direct current.
Last Answer : An electrical current which flows in one direction only.
Description : a. Define the term "working voltage" of a capacitor. b. What should be the working voltage of a capacitor in a circuit that is operating at 600 volts?
Last Answer : a. It is the maximum voltage the capacitor can work without risk of damage. b. 900 volts.
Description : Define the term "farad."
Last Answer : A farad is the unit of capacitance. A capacitor has a capacitance of 1 farad when a difference of 1 volt will charge it with 1 coulomb of electrons.
Description : Define loss.
Last Answer : Loss is the decrease in the amount of light reaching the end of the fiber.
Description : Define the heterodyne principle.
Last Answer : An impedance in which the resulting current is not proportional to the applied voltage.