TY - GEN
T1 - 5 Gb/s x 16 Channel bidirectional transmission over 560-km of single-mode fiber using bidirectional EDFA based on spectrally interleaved synchronized etalon filters
AU - Kim, C. H.
AU - Chung, Y. C.
PY - 1999
Y1 - 1999
N2 - Bidirectional WDM transmission systems could reduce the use of fiber infrastructure by a factor of two. The limited capacity, compared to unidirectional WDM systems, may not be a problem in most applications as the WDM systems are capable of providing extremely large bandwidth. Recently, the feasibility of bidirectional WDM transmission over a single fiber has been demonstrated [1]. However, the bidirectional EDFA used in this work was implemented without isolators. Thus, the maximum gain of this amplifier was limited to about 19 dB due to the relative intensity noise (R1N) caused by Rayleigh backscattering and optical reflections [2]. To overcome this problem, there have been some efforts to suppress the effccts of RIN by using optical bandpass filters and fiber Bragg grating filters [31-[5]. However, the maximum number of WDM signals that can be supported in these EDFA's were limited by the 3-dB bandwidth of the optical bandpass filter or the number of fiber Bragg grating filters. In this paper, we propose a new bidirectional EDFA by using two spectrally interleaved synchronized etalon filters. Our theoretical calculation shows that it would be possible to use up to eight of these amplifiers in concatenation. To confirm this estimation, we measured the performance of this amplifier in a 2.5 Gb/s x 16-channcl bidirectional WDM transmission system using a re-circulating loop. Tljie experimental results show a good agreement with the theoretically estimated values.
AB - Bidirectional WDM transmission systems could reduce the use of fiber infrastructure by a factor of two. The limited capacity, compared to unidirectional WDM systems, may not be a problem in most applications as the WDM systems are capable of providing extremely large bandwidth. Recently, the feasibility of bidirectional WDM transmission over a single fiber has been demonstrated [1]. However, the bidirectional EDFA used in this work was implemented without isolators. Thus, the maximum gain of this amplifier was limited to about 19 dB due to the relative intensity noise (R1N) caused by Rayleigh backscattering and optical reflections [2]. To overcome this problem, there have been some efforts to suppress the effccts of RIN by using optical bandpass filters and fiber Bragg grating filters [31-[5]. However, the maximum number of WDM signals that can be supported in these EDFA's were limited by the 3-dB bandwidth of the optical bandpass filter or the number of fiber Bragg grating filters. In this paper, we propose a new bidirectional EDFA by using two spectrally interleaved synchronized etalon filters. Our theoretical calculation shows that it would be possible to use up to eight of these amplifiers in concatenation. To confirm this estimation, we measured the performance of this amplifier in a 2.5 Gb/s x 16-channcl bidirectional WDM transmission system using a re-circulating loop. Tljie experimental results show a good agreement with the theoretically estimated values.
UR - http://www.scopus.com/inward/record.url?scp=85039917487&partnerID=8YFLogxK
U2 - 10.1109/OFC.1999.766423
DO - 10.1109/OFC.1999.766423
M3 - Conference contribution
AN - SCOPUS:85039917487
T3 - OFC/IOOC 1999 - Optical Fiber Communication Conference and the International Conference on Integrated Optics and Optical Fiber Communication
SP - 310
EP - 312
BT - OFC/IOOC 1999 - Optical Fiber Communication Conference and the International Conference on Integrated Optics and Optical Fiber Communication
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1999 Optical Fiber Communication Conference and the International Conference on Integrated Optics and Optical Fiber Communication, OFC/IOOC 1999
Y2 - 21 February 1999 through 26 February 1999
ER -