Abstract

A new noise mitigation design strategy for spectrum sliced microwave photonic filters is presented. It is based on making the spectral slice bandwidths narrower than the modulation frequency and making the spacing between slices larger than the photodetector bandwidth. Advantages of this approach are that it is particularly simple, it does not require additional components, and it does not distort the signal. A detailed theoretical model of the relative intensity noise in spectrum sliced photonic signal processors is presented, including the effects of modulation, dispersion, and multislice stochastic sources. The phenomenon of modulation-induced noise translation in spectrum-sliced photonic signal processors is also reported for the first time. Results show that the new design strategy for noise mitigation can realize a significant increase in the SNR for a filter operating at 6.3 GHz.

© 2006 IEEE

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Electron. Lett. (5)

A. P. Foord, P. A. Davies, P. A. Greenhalgh, "Synthesis of microwave and millimeter wave filters using optical spectrum slicing," Electron. Lett. 32, 390-392 (1996).

J. Capmany, D. Pastor, B. Ortega, "Fiber optic microwave and millimeterwave filter with high-density sampling and very high sidelobe suppression using subnanometer optical spectrum slicing," Electron. Lett. 35, 494-495 (1999).

B. A. L. Gwandu, W. Zhang, J. A. R. Williams, "Microwave photonic filtering using a profiled superstructured fiber Bragg grating and dispersive fiber," Electron. Lett. 38, 1328-1330 (2002).

P. R. Morkel, R. L. Laming, D. N. Payne, "Noise characteristics of high-power doped-fiber superluminescent sources," Electron. Lett. 26, 96-98 (1990).

X. Yi, R. A. Minasian, "Noise characteristics of spectrum sliced microwave photonic filters," Electron. Lett. 42, 814-816 (2006).

IEEE Microw. Guided Wave Lett. (1)

D. B. Hunter, R. A. Minasian, "Microwave optical filters using in-fibre Bragg grating arrays," IEEE Microw. Guided Wave Lett. 6, 103-105 (1996).

IEEE Photon. Technol. Lett. (6)

J. L. Chen, R. A. Minasian, "Novel synthesised photonic signal processor with hardware compression," IEEE Photon. Technol. Lett. 17, 896-898 (2005).

D. Pastor, J. Capmany, B. Ortega, "Broad-band tunable microwave transversal notch filter based on tunable uniform fiber Bragg gratings as slicing filters," IEEE Photon. Technol. Lett. 13, 726-729 (2001).

J.-S. Lee, Y. C. Chung, T. H. Wood, J. P. Meester, C. H. Joyner, C. A. Burrus, J. Stone, H. M. Presby, D. J. DiGivoanni, "Spectrum-sliced fiber amplifier light source with a polarization insensitive electroabsorption modulator," IEEE Photon. Technol. Lett. 6, 1035-1037 (1994).

S.-J. Kim, J.-H. Han, J.-S. Lee, C.-S. Park, "Intensity noise suppression in spectrum-sliced incoherent light communication systems using a gain saturated semiconductor optical amplifier," IEEE Photon. Technol. Lett. 11, 1042-1044 (1999).

M. Zhao, G. Morthier, R. Baets, "Analysis and optimization of intensity noise reduction in spectrum-sliced WDM systems using a saturated semiconductor optical amplifier," IEEE Photon. Technol. Lett. 14, 390-392 (2002).

W. K. Marshall, A. Yariv, "Spectrum of the intensity of modulated noisy light after propagation in dispersive fiber," IEEE Photon. Technol. Lett. 12, 302-304 (2000).

IEEE Trans. Microw. Theory Tech. (2)

J. Capmany, D. Pastor, B. Ortega, "New and flexible fiber-optic delay-line filters using chirped Bragg gratings and laser arrays," IEEE Trans. Microw. Theory Tech. 47, 1321-1326 (1999).

X. Yi, R. A. Minasian, "Dispersion induced RF distortion of spectrum sliced microwave photonic filters," IEEE Trans. Microw. Theory Tech. 54, 880-886 (2006).

J. Lightw. Technol. (3)

T. Erdogan, "Fiber grating spectra," J. Lightw. Technol. 15, 1277-1294 (1997).

A. D. McCoy, P. Horak, B. C. Thomsen, M. Ibsen, D. J. Richardson, "Noise suppression of incoherent light using a gain-saturated SOA: Implications for spectrum-sliced WDM systems," J. Lightw. Technol. 23, 2399-2409 (2005).

G. J. Pendock, D. D. Sampson, "Transmission performance of high bit rate spectrum-sliced WDM systems," J. Lightw. Technol. 14, 2141-2148 (1996).

Microw. Opt. Technol. Lett. (2)

J. Lu, H. Chi, X. Zhang, L. Shen, "Noise reduction using photonic microwave filter for radio over fiber system," Microw. Opt. Technol. Lett. 48, 305-307 (2006).

X. Dong, P. Shum, N. Q. Ngo, C.-L. Zhao, J. Yang, C. C. Chan, "A bandwidth tunable FBG filter with fixed center wavelength," Microw. Opt. Technol. Lett. 41, 22-24 (2004).

Opt. Lett. (1)

Other (3)

J. W. Goodman, Statistical Optics (Wiley, 1985).

G. P. Agrawal, Nonlinear Fiber Optics (Academic, 2001).

C. H. CoxIII, Analog Optical Links: Theory and Practice (Cambridge Univ. Press, 2004).

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