Optical: systems and elements – Light interference – Electrically or mechanically variable
Patent
1989-02-21
1992-04-07
Bovernick, Rodney B.
Optical: systems and elements
Light interference
Electrically or mechanically variable
359579, 356252, G02B 2600, G02F 121
Patent
active
051033402
ABSTRACT:
This invention describes a tunable optical filter to be used in an optical communication system. The filter of this invention has a pair of resonator cavities which are cascaded. The lengths of each of the cavities change simultaneously with the change in length of a piezoelectric sleeve which contacts a reflective surface of each of the cavities through spacers. The sleeves and spacers are set so as to move the reflecting surfaces of the cavities along a single axis in response to a single control signal. When optical signals are passed through the two cavities and when the ratio of the length of the cavities is adjusted to a predetermined ratio of integers, the resonator cavity will resonate at a desired wavelength.
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Dono Nicholas R.
Green, Jr. Paul E.
Perrier Philippe A.
Bovernick Rodney B.
Cameron Douglas W.
International Business Machines - Corporation
Shafer R. D.
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