이중 링 Add/Drop 필터와 All-pass 지연 필터로 구성된 이차원 OCDMA 인코더/디코더
Two-dimensional OCDMA Encoder/Decoder Composed of Double Ring Add/Drop Filters and All-pass Delay Filters
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초록
이중 링 add/drop 필터와 all-pass 지연 필터로 구성된 이차원 optical code division multiple access (OCDMA) 인코더/디코더를 제안하고, 설계 예시 및 수치해석을 통하여 실현 가능성을 확인하였다. 제안된 OCDMA 인코더/디코더의 칩 면적은 지연 도파로를 사용하는 기존 OCDMA 인코더/디코더에 비하여 1/3 정도로 줄어든다. 제안된 소자의 성능을 모델링하기 위하여 고속 푸리에 변환(fast Fourier transform, FFT) 및 전달 행렬 기법을 사용하였다. 정확한 코드로 디코딩된 펄스의 중심에서 자기상관 피크 값은 어긋난 파장 호핑 코드 및 스펙트럼 위상 코드로 디코딩된 경우의 최대 교차상관 레벨에 비하여 3배 이상으로 관측되었다. 이를 통하여 forward error correction (FEC) 한계에 해당하는 10 −3 이하의 비트 에러 오율을 얻을 수 있음을 알 수 있다.
Abstract
A two-dimensional optical code division multiple access (OCDMA) encoder/decoder, which is composed of add/drop filters and all-pass filtersfor delay operation, is proposed. An example design is presented, and its feasibility is illustrated through numerical simulations. The chip area of the proposed OCDMA encoder/decoder could be about one-third that of a previous OCDMA device employing delay waveguides. Its performance is numerically investigated using the transfer-matrix method combined with the fast Fourier transform. The autocorrelation peak level over the maximum cross-correlation level for incorrect wavelength hopping and spectral phase code combinations is greater than 3 at the center of the correctly decoded pulse, which assures a bit error rate lower than 10 −3 , corresponding to the forward error-correction limit.
참고문헌 (19)
- Z. Wang, "Physical encoding in optical layer security", J. Cyber Secur. Mobil, 1, pp.83~100 (2012)
- J. P. Heritage, "Advances in spectral optical code-division multiple-access communications", IEEE J. Quantum Electron, 13, pp.1351~1369 (2007)
- J. A. Salehi, "Code division multiple-access techniques in optical fiber networks, Part I : Fundamental principles", IEEE Trans. Commun, 37, pp.824~842 (1989)
- M. E. Marhic, "Trends in optical CDMA", Proc. SPIE, 1787, pp.80~98 (1992)
- D. D. Sampson, "Photonic code-division multiple-access communications", Fiber Integr. Opt, 16, pp.129~157 (1997)
- L. Tancevski, "Wavelength hopping", time spreading code division multiple access systems, 1994, pp.30, 1388~1390
- L. Tancevski, "Hybrid wavelength hopping", time spreading schemes for use in massive optical networks with increased security, 1996, pp.14, 2636~2647
- X. Wang, "A sequentially self-seeded Fabry–Perot laser for two-dimensional encoding", decoding of optical pulses, 2003, pp.39, 83~90
- P. C. Teh, "A comparative study of the performance of seven-and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings", J. Light. Technol, 9, pp.1352~1365 (2001)
- P. C. Teh, "A 16-chnnel OCDMA system(4 OCDM ×4 WDM)based on 16-chip, 20 Gchip", s superstructure fibre Bragg gratings and DFB fibre laser transmitters, 2002, 600~601
- A. Agarwal, "Fully programmable ringresonator-based integrated photonic circuit for phase coherent applications", J. Light. Technol, 24, pp.77~87 (2006)
- X. Wang, "Novel reconfigurable two-dimensional coherent optical en", decoder based on coupled micro-ring reflector, 2011, pp.23, 591~593
- Z. Ji, "Twodimensional coherent optical en", decoder using parallel–cascaded coupled third-order microring resonator, 2015, pp.347, 123~129
- 정영철, "Design and Simulation of Two-Dimensional OCDMA En", Decoder Composed of Double Ring Add, Current Optics and Photonics, pp.2016, 20(2)[DOI]
- J. K. S. Poon, "Matrix analysis of microring coupledresonator optical waveguides", Opt. Express, 12, pp.90~103 (2004)
- N. Daldosso, "Comparison among various Si3N4 waveguide geometries grown within a CMOS fabrication pilot line", IEEE J. Light. Technol, 22, pp.1734~1740 (2004)
- B. E. Little, "Microring resonator channel dropping filters", J. Light. Technol, 15, pp.998~1005 (1997)
- G. P. Agrawal, "Fiber-optic Communication Systems" (2010), John Wiley & Sons
- F. Chang, "Forward error correction for 100 G transport networks", IEEE Commun. Mag, 48, pp.S48~S55 (2010)