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Novel all-fiber bandpass filter based on hollow optical fiber

By: Yu, J.W.; Eom, T.J.; Choi, S.; Oh, K.; Lee, B.H.;

2002 / IEEE


This item was taken from the IEEE Periodical ' Novel all-fiber bandpass filter based on hollow optical fiber ' We report an in-line all-fiber bandpass filter based on a hollow optical fiber (HOF) core mode blocker along with a long-period fiber grating (LPG) pair. It is theoretically and experimentally confirmed that selective core mode blocking at the HOF region located in the middle of the LPG pair could provide efficient passband channels corresponding to the resonant wavelengths of the LPGs. The filter characteristics in passbands and the nearfield patterns of guided modes in the proposed device are discussed.