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Dispersion-order selectable chromatic dispersion compensator using strain-profile modification blocks

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2 Author(s)
Jaejoong Kwon ; Sch. of Electr. Eng., Seoul Nat. Univ., South Korea ; Byoungho Lee

A new method for tuning the dispersion profile of a fiber grating is described. The method involves compressing the fiber grating attached to a structure in which the cross-sectional area varies with its position. Because the cross-sectional area defines the compression rate, the local Bragg reflection wavelength that determines the dispersion profile varies along the position. A structure in which the cross-sectional area can be simply altered by inserting-extracting a part of structure was designed. Therefore, the dispersion order of the fiber grating attached to the structure can be selected. Using the method, a linearly-quadratically chirped fiber grating was made and various group delay slopes depending on the applied stress were obtained.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 11 )