Appeal No. 96-3896
Application No. 08/152,315
multiplexed optical signal ë does not include an optical
k
signal at a wavelength of ë to said in-fiber Bragg grating
i
reflector for transmission to said second circulator port (2);
and
both of said optical signals being circulated from
said second circulator port (2) to said third circulator port
(3) which is the next port in the circulating direction so
that a combined multiplexed output of said optical signals is
coupled from said third circulator port (3).
8. An optical demultiplexer for demuliplexing [sic]
an input signal containing a group of signals each at a
different wavelength (ë ë ëk = 1, 2 . . . jë ) into at least two optical
signals comprising:
an optical circulator having at least three
circulator ports (1, 2, 3) for circulating optical signals
from one port to the next port in a circulating direction;
means for coupling said input signal comprising a
group of signals each at a different wavelength (ë ) to a
k
first of said circulator ports (1);
an in-fiber Bragg grating reflector for reflecting
substantially only a desired one of said optical signals at a
first wavelength (ë );
j
means for coupling said in-fiber Bragg grating
reflector to a second of said circulator ports (2) which is
the next circulator port in the circulating direction from
said first circulator port (1) for reflecting said desired one
of said optical signals at a first wavelength (ë ) back to
j
said second circulator port (2);
said desired one of said two optical signals at a
first wavelength (ë ) being circulator from said second
j
3
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