Title: Optical pulse time spreading device
Application Number: 200610128105 Application Date: 2006.09.04
Publication Number: 1933384 Publication Date: 2007.03.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04J14/00
Applicant(s) Name: Oki Electric Ind Co., Ltd. Address:
Inventor(s) Name:
Attorney & Agent: wangsi beng
Abstract:
    The present invention is an SSFBG with which there are few restrictions on the code that can be set and the overall length of which is short. This SSFBG has four unit FBGs the Bragg reflection wavelengths of which are lambda1, lambda2, lambda3, and lambda4 disposed with a part where the unit FBGs overlap one another in the waveguide direction of the optical fiber. The left end of the horizontal axis corresponds to the position of the I/O terminal of the SSFBG and the right end of the horizontal axis corresponds to the terminal on the opposite side from the I/O terminal of the SSFBG. The Bragg reflection wavelengths lambda1, lambda2, lambda3, and lambda4 of the four unit FBGs are lambda1=1543.28 nm, lambda2=1543.60 nm, lambda3=1543.92 nm, and lambda4=1544.24 nm respectively. Codes (lambda1, lambda2, lambda3, and lambda4) used in the time-spreading/wavelength hopping system are established for the SSFBG by disposing the four unit FBGs at equal intervals such that the interval therebetween is 12.8 mm.
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