Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-03-22
2005-03-22
Lee, John R. (Department: 2881)
Optical waveguides
With optical coupler
Particular coupling structure
C398S158000
Reexamination Certificate
active
06870989
ABSTRACT:
Add/drop functions of light signals in an optical fiber light transmission system are performed using a group of bandpass light filters, wherein each of the group of bandpass light filters is operable to reflect a reflected wavelength band and transmit a transmitted wavelength band. A filter module is positioned to selectively place any of the group of bandpass light filters into a light path of the optical fiber light transmission system. A first add/drop function is accomplished by first positioning a first selected one of the bandpass light filters into the light path using a drive mechanism, directing the input light beam onto the first selected one of the bandpass light filters, performing the first add/drop function on the input light beam relative to a first band light signal in a first wavelength band, and removing the first selected one of the bandpass light filters from the light path using the drive mechanism. A second add/drop function is accomplished by second positioning a second selected one of the bandpass light filters into the light path using the drive mechanism, directing the input light beam onto the second selected one of the bandpass light filters, and performing the second add/drop function on the input light beam relative to a second-band light signal in a second wavelength band.
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Devenyi Gabor
Ross Brien D.
Whitty James R.
Hashmi Zia R.
Lee John R.
Raytheon Company
Schubert William C.
Vick Karl A.
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