Appeal 2007-1059
Application 10/408,598
waveguide 18 operates on the next highest power order, such as the M-1 or
M+1 order. (Id. 2 and 3.)
3. Waveguide 18 is coupled to the detector array 20, which measures the
power of every channel. (Id. 3 and 4.)
The Prior Art Relied upon
4. Urino teaches an optical network including a plurality of monitoring
waveguides for monitoring the wavelengths in a signal. (Col. 6, lines 50-
56.)
5. As depicted in Figure 1, the disclosed optical network includes a de-
multiplexer, which comprises an input waveguide (11) coupled to an input-
side slab waveguide (12) adjoining an arrayed waveguide (13), which
juxtaposes an output-side slab waveguide (14) for dividing a wavelength-
division multiplexed optical signal into signals that have different
wavelengths and for extracting the diffraction orders for the signal. (Col. 5,
ll. 36-47; col. 6, ll. 8-27.)
6. The extracted diffraction orders (m+1 or m-1) are then forwarded to
output waveguides (15, 16), which are coupled to the de-multiplexer,
permitting one of said output waveguides (16) to monitor received signal
wavelengths. (Col. 6, ll. 49-62.)
5
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Last modified: September 9, 2013