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Author: search.filters.author.Ho, KPSubject: search.filters.subject.fiber Bragg grating

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    Power equalized wavelength-selective fiber lasers using fiber Bragg gratings
    (1998-10-15)
    Liaw, SK
    ;
    Lee, CC
    ;
    Ho, KP
    ;
    Chi, S
    ;
    光電工程學系
    A fiber Bragg grating (FBG) based multi-wavelength ring laser is experimentally investigated in this paper. The lasing wavelengths can be dynamically selected by using a 1 x N optical switch. Micro-bender between FBGs is used as variable attenuator to equalize the output power for each lasing wavelength. By using passive multi-ring cavities (MRC) method, single- or dual-wavelength laser of equal output power is demonstrated for a signal-to-noise ratio (SNR) of 63 dB and a narrow linewidth of 3 kHz. (C) 1998 Elsevier Science B.V. All rights reserved.
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    Proposed power-equalized EDFA modules using fiber Bragg gratings with various reflectivities
    (1999)
    Liaw, SK
    ;
    Ho, KP
    ;
    Hsu, KY
    ;
    Chi, S
    ;
    光電工程學系
    We proposed and experimentally demonstrated two power equalized erbium-doped fiber amplifier (EDFA) modules using fiber Bragg gratings (FBGs) with various reflectivities for individual channels. The transmission type power-equalized EDFA module is low-cost for its simple design, while the reflection type power-equalized EDFA module can suppress most of the amplified spontaneous emission noise. Both consist of a bidirectional EDFA, a set of FBG chains with suitable reflectivities, and an optical isolator / optical circulator They can find potential applications in wavelength division multiplexing lightwave transmission systems.
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    High-dynamic-range optical cross-connect device using fiber Bragg gratings
    (1999-08-01)
    Liaw, SK
    ;
    Ho, KP
    ;
    Chen, LK
    ;
    Tong, F
    ;
    Chi, S
    Using in optical networks; a reconfigurable and low-cost 2 x 2 optical cross-connect device based on fiber Bragg gratings and optical limiting amplifiers is investigated and demonstrated. The input dynamic range is over 20 dB for both crossing and passing channels. Small power penalty of 0.6-1.0 dB is found for a two-channel 2.5 Gb/s over a 100-km system demonstration.
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    Experimental investigation of wavelength-tunable WADM and OXC devices using strain-tunable fiber Bragg gratings
    (1999-10-01)
    Liaw, SK
    ;
    Ho, KP
    ;
    Lin, CL
    ;
    Chi, S
    ;
    光電工程學系
    Two reconfigurable wavelength add/drop multiplexer (WADM) and optical cross-connect (OXC) devices based on strain-tunable fiber Bragg gratings (ST-FBGs) are proposed. The feasibility of WADM is verified by measuring the bit-error-rate performance of the dropped (cross-connect) and pass-through (no cross-connect) channels over a 50- and 100-km standard single-mode fiber for a 2.5 Gb/s system. Compared to back-to-back transmission, a negligible power penalty of only 0.2 dB is observed. (C) 1999 Published by Elsevier Science B.V. All rights reserved.