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01.12.2015 , (Web Science, Scopus) (. Vak.ed.gov.ru 16.03.2018)

(07.2014) : - AUTOMATIC BIAS CONTROL OF MACHZEHNDER MODULATORS FOR QPSK AND QAM SYSTEMS

- AUTOMATIC BIAS CONTROL OF MACHZEHNDER MODULATORS FOR QPSK AND QAM SYSTEMS

- AUTOMATIC BIAS CONTROL OF MACHZEHNDER MODULATORS FOR QPSK AND QAM SYSTEMS

© 2014 . S. M. Bilal, PhD Scholar; G. Bosco, PhD

 

DET, Politecnico di Torino, Torino, Italy

E-mail: syed.bilal@polito.it, gabriella.bosco@polito.it

A close-loop control technique for automatic bias control of inner and outer Mach-Zehnder modulators in a dual parallel configuration is presented. The Mach-Zehnders are configured as dual parallel optical modulators. The technique is based on applying low amplitude pilot tones at three different direct current biasing ports of the modulators. By carefully monitoring the amplitude of the beating between these pilot tones, a close-loop control technique can be developed that will automatically monitor and follow the drift of the direct current biasing voltage from its optimum. Hence the technique will enable the modulators to exhibit long term stability for the Quadrature Phase Shift Keying or M-Quadrature Amplitude Modulation Systems.

 

Keywords: dual parallel Mach-Zender modulator, phase shift keying, quadrature amplitude modulation, pilot tones, beating tones, direct current biasing voltage, in-phase electric field, quadrature electric field.

 

OCIS codes: 060.0060, 060.1660, 060.4080

 

Submitted 29.01.2014

1. Zhang S., Kam P.-Y, Yu C., Chen J. Decision-aided carrier phase estimation for coherent optical communications // Journal of Lightwave Technology. 2010. V. 28. 11. P. 1597-1607.

2. Gnauck A., Winzer P., Chandrasekhar S., Liu X., Zhu B., Peckham D. 10x224-gb/s wdm transmission of 28-gbaud pdm 16-qam on a 50-GHz grid over 1,200 km of fiber // Proc. OFC/NFOEC. 2010. Paper. PDPB8.

3. Kikuchi K. Analyses of wavelength- and polarization-division multiplexed transmission characteristics of optical quadrature-amplitude modulation signals // Opt. Exp. 2011. V. 19. 19. P. 17985-17995.

4. Zhou X., Yu J. 200-gb/s pdm-16qam generation using a new synthesizing method // Proc. ECOC. 2009. Paper. 10.3.5.

5. Sano A., Kobayashi T., Ishihara K, Masuda H, Yamamoto S., Mori K, Yamazaki E., Yoshida E, Miyamoto Y., Yamada T., Yamazaki H. 240-gb/s polarization-multiplexed 64-qam modulation and blind detection using plc-ln hybrid integrated modulator and digital coherent receiver // Proc. ECOC. 2009. Paper. PD2.2.

6. Sotoodeh M., Beaulieu Y., Harley J., McGhan D.L. Modulator bias and optical power control of optical complex E-Field modulators // Journal of Lightwave Technology. 2011. V. 29. 15. P. 2235-2248.

7. Wooten E.L., Kissa K.M., Yi-Yan A., Murphy E.J., Lafaw D.A., Hallemeier P.F., Maack D., Attanasio D.V., Fritz D.J., McBrien G.J., Bossi D.E. A review of lithium niobate modulators for fiber-optic communications systems // IEEE Journal of Selected Topics in Quantum Electronics. 2000. V. 6. 1. P. 69-82.

8. Bhandare S., Sandel D., Milivojevic B., Hidayat A., Fauzi A.A., Zhang H., Ibrahim S.K., Wust F., Noe R. 5.94-Tb/s 1.49-b/s/Hz(40x2x24x40 Gb/s) RZDQPSK polarization-division multiplex C-band transmission over 324 km // IEEE Photonics Technology Letters. 2005. V. 17. 4. P. 914-916.

9. Kenro S., Hasegawa C., Kikuchi N., Sasaki S. A. Novel bias control technique for MZ modulator with monitoring power of backward light for advanced modulation formats // Proc. OFC/NFOEC. 2007. Paper. OTuH5.

10. Yoshida T., Sugihara T., Uto K., Bessho H., Sawada K., Ishida K., Shimizu K., Mizuochi T. A study on automatic bias control for arbitrary optical signal generation by dual-parallel Mach-Zehnder modulator // Proc. ECOC. 2010. Paper. Tu.3.A.6.

11. Peng W.R., Zhang B., Wu X., Feng K.M., Willner A.E., Chi S. Compensation for I/Q imbalances and bias deviation of the Mach-Zehnder modulators in direct-detected optical OFDM systems // IEEE Photonics Technology Letters. 2009. V. 21. 2. P. 103-105.

12. Kawakami H., Yoshida E., Miyamoto Y. Asymmetric dithering technique for bias condition monitoring in optical QPSK modulator // Electron. Lett. 2010. V. 46. 6. P. 430-431.

13. Cho P.S., Khurgin J.B., Shpantzer I. Closed-loop bias control of optical quadrature modulator // IEEE Photonics Technology Letters. 2006. V. 18. 21. P. 2209-2211.