Appeal No. 96-3896
Application No. 08/152,315
port 3, creating a multiplexed output optical signal comprised
of ë and ë on output path 34.j k
In the demultiplexer of Figure 3, a three-port
optical circulator 36 circulates optical signals from one port
to the next. That is, optical signals which enter port 1 exit
at port 2 and optical signals which enter port 2 exit at port
3. A Bragg grating reflector 46 selects an optical channel to
be removed from the optical system. A multiplexed optical
signal ë comprised of a group of signals is coupled to
k
circulator port 1 through input path 42. Reflector 46
reflects an optical wavelength ë . The multiplexed optical
j
signal input at port 1 exits the optical circulator at port 2.
The optical wavelength ë is reflected by the Bragg grating
j
and re-enters the optical circulator through port 2. The
remaining wavelengths of the multiplexed optical signal are
transmitted through grating reflector 46 to output 48. The
demultiplexed optical signal ë
j
is circulated from circulator port 2 to circulator port 3
where it exits onto output 44.
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Last modified: November 3, 2007