Mechanically induced modulation is an optical signal modulation induced by mechanical means.
An example of deleterious mechanically induced modulation is speckle noise created in a multimode fiber by an imperfect splice or imperfectly mated connectors. Mechanical disturbance of the fiber ahead of the joint will introduce changes in the modal structure, resulting in variations of joint loss. This is a subset of many mechanisms that can lead to modal noise in an optical system.
Famous quotes containing the words mechanically, induced and/or modulation:
“For you, o broker, there is no other principle but arithmetic. For me, commerce is of trivial import; love, faith, truth of character, the aspiration of man, these are sacred; nor can I detach one duty, like you, from all other duties, and concentrate my forces mechanically on the payment of moneys.”
—Ralph Waldo Emerson (1803–1882)
“It is a misfortune that necessity has induced men to accord greater license to this formidable engine, in order to obtain liberty, than can be borne with less important objects in view; for the press, like fire, is an excellent servant, but a terrible master.”
—James Fenimore Cooper (1789–1851)
“Every accent, every emphasis, every modulation of voice, was so perfectly well turned and well placed, that, without being interested in the subject, one could not help being pleased with the discourse; a pleasure of much the same kind with that received from an excellent piece of music. This is an advantage itinerant preachers have over those who are stationary, as the latter can not well improve their delivery of a sermon by so many rehearsals.”
—Benjamin Franklin (1706–1790)