Appeal No. 1999-2250
Application No. 08/980,308
first optical means having first, second and third ports for receiving
an input optical signal having a plurality of wavelength components at the
first port, for directing the input optical signal to the second port, for
receiving a reflected optical signal returning to the second port, and for
directing the reflected optical signal to the third port; and
second optical means having a fourth port connected directly to the
second port of the first optical means for directly receiving the input optical
signal directed to the second port and for reflecting only a predetermined
wavelength component of the input optical signal received via the fourth
port, said reflected predetermined wavelength component comprising the
reflected optical signal returning to the second port, said second optical
means having a fifth port and passing other wavelength components of
the input optical signal to the fifth port;
wherein the second optical means comprises a fiber Bragg grating
reflection filter for making a refractive index difference with a grating
period having regular intervals using light interference, and for reflecting
only the predetermined wavelength component backward from a light
traveling direction.
The examiner relies on the following references:
Chawki et al. [Chawki] 5,726,785 Mar. 10, 1998
(filed Feb. 21, 1996)
Painchaud et al. [Painchaud] 5,748,814 May 05, 1998
(filed Nov. 16, 1995)
Claims 1 and 3-11 stand rejected under 35 U.S. C. § 103 as unpatentable over
Chawki and Painchaud.
Reference is made to the briefs and answer for the respective positions of
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 Next
Last modified: November 3, 2007