论文信息 - Cost-effective 10-Gb/s optical duobinary transmission systems using a nonbuffered X-cut LiNbO/sub 3/ Mach-Zehnder modulator

Cost-effective 10-Gb/s optical duobinary transmission systems using a nonbuffered X-cut LiNbO/sub 3/ Mach-Zehnder modulator

We demonstrate a cost-effective method to implement a 10-Gb/s optical duobinary transmitter using a simple nonbuffered x-cut LiNbO/sub 3/ Mach-Zehnder (MZ) modulator. The bandwidth of the modulator used in our experimental demonstration is 4 GHz. The duobinary signal generated from the nonbuffered MZ modulator exhibits a similar performance to the one using a 9-GHz bandwidth buffered MZ modulator, in terms of dispersion and self-phase modulation tolerance. Thus, the use of cost-effective nonbuffered x-cut MZ modulators will substantially relax the cost issues of duobinary transmitters, by offsetting the cost of the precoder and the encoder which are not needed in conventional on-off keying transmitters.

[1] E.L. Wooten,et al. A review of lithium niobate modulators for fiber-optic communications systems , 2000, IEEE Journal of Selected Topics in Quantum Electronics.

[2] L. Pierre,et al. 210 km repeaterless 10 Gb/s transmission experiment through nondispersion-shifted fiber using partial response scheme , 1995, IEEE Photonics Technology Letters.

[3] J. Prat,et al. Reduced driving voltage optical duobinary transmitter and its impact on transmission performance over standard single-mode fiber , 2002, IEEE Photonics Technology Letters.

[4] Jichai Jeong,et al. Performance limits of 10-Gb/s optical duobinary transmissions using reduced bandwidth single-arm Mach-Zehnder modulators considering residual chirp and dc-bias offset , 2003 .

[5] A. Royset,et al. Symmetry requirements for 10-Gb/s optical duobinary transmitters , 1998, IEEE Photonics Technology Letters.

[6] Hoon Kim,et al. Optical duobinary transmission system featuring improved receiver sensitivity and reduced optical bandwidth , 2002, IEEE Photonics Technology Letters.

[7] M. Shtaif,et al. The relation between optical duobinary modulation and spectral efficiency in WDM systems , 1999, IEEE Photonics Technology Letters.

[8] Amaresh Mahapatra,et al. Chapter 6 – Electrooptic Modulators , 2002 .

[9] W. Rosenkranz,et al. Reduced complexity optical duobinary 10-Gb/s transmitter setup resulting in an increased transmission distance , 2001, IEEE Photonics Technology Letters.