FLEXIBLE TUNABLE SPECTRUM SLICED MICROWAVE PHOTONIC FILTER USING PARALLEL FABRY-PÉROT FILTERS AND FIBER BRAGG GRATING

Authors

  • R.K. Jeyachitra
  • Dr. (Mrs.) R. Sukanesh

DOI:

https://doi.org/10.1590/S2179-10742010000200001

Keywords:

Fabry-Pérot (FP) filter, Fiber Bragg Grating, fiber delay, Free Spectral Range (FSR), Microwave photonics, Q-factor, spectrum slicing, tunability

Abstract

A simple and low-cost spectrum sliced microwave photonic filter with high tunability has been implemented. This is based on use of two Fabry-Pérot filters with same free spectral range connected in parallel but one filter with an external fiber delay. An extension of this configuration with Fiber Bragg Grating (FBG) as delay element is also demonstrated. This architecture overcomes the tuning difficulties of a single Fabry-Pérot filter employed as a slicing element. Flexible tunability, large overall free spectral range and high quality factor have been obtained with the proposed configuration owing to the use of fiber delay/FBG. Wide and step tuning has been achieved in the frequency range of 41.1GHz to 50.23GHz in steps of 2.28GHz. The additional components are another Fabry-Pérot filter and fiber delay/FBG which makes the proposed architecture highly compact and cost-effective. Most of the practical difficulties faced in use of optical fiber are eliminated using FBGs. The characteristics of proposed configuration with different applied delays using fiber and FBG were tabulated. An analysis of flexible tunable property of the filter was made in terms of length of fiber delay and grating length of FBG and the results were plotted. Also quality factor calculation of the proposed filter was discussed.

References

Chi H. Lee, editor, Microwave Photonic

R. Sukanesh, R.K.Jeyachitra, P. Gautham, A. Raja and Shailesh Ajmera, "Investigation of the techniques deployed in spectrum slicing for microwave photonic filters,`` in (ICCCN) 2008, pp. 1-6, Dec.2008.

R. Sukanesh, R.K.Jeyachitra, Shailesh Ajmera, K.Avinash, S.Manochandar, "Optical CAD tools for microwave photonic filters,`` Proc. Int. Conf. Mech. and Elect. Eng. (ICMEE) World Scientific Press.

J. Capmany, D. Pastor, B. Ortega, "Fiber optic microwave and millimeter very high sidelobe suppression using sub nanometer optical spectrum slicing,`` 496, Mar.1999.

R.K.Jeyachitra, R.Sukanesh and Shailesh Ajmera Parallel Fabry-Pérot Filters and Fiber Delay``, 483, Dec.2009.

Borja Vidal, Miguel A. Piqueras, Juan L. Corral, Javier Martí, "Tunable photonic microwave filter based on two parallel Fabry-Pérot filters.`` Proc.Int. Topical Meeting on Microwave Photonics,

Kenneth O. Hill, Gerald Meltz, "Fiber Bragg Grating Technology Fundamentals and Overview``, vol. 15, no. 8, pp.1263-1276, Aug.

Govind P. Agarwal, Author, Applications of Nonlinear Fiber Optics

Lina ZHOU, Xinliang ZHANG, Enuming XU, "Q value analysis of microwave photonic filters``, Optoelectron. China.vol. 2, no. 3, pp. 269 R. K. Jeyachitra received her B.E. degree in Electronics and Communication Engineering, M.E. in Microwave and Optical Engineering from Madurai Kamaraj University, Madurai in 1995 and 1997 respectively. She is currently pursuing research in microwave photonics. From 1998 t as lecturer and from 2004 working as Assistant Professor in the department of ECE, National Institute of Technology, Trichy. Her research interests are microwave/ millimeter (PCF). She is a life member of IE, IETE, ISTE and Member in OSA and SPIE. Dr. (Mrs.) R. Sukanesh, B.E. (ECE) from Government College of Technology, Coimbatore in 1982. She obtained her M.E. degree (Communication Systems) from P.S.G. Technology, Coimbatore in 1985 and Ph.D. in Bio Medical Engineering from Madurai Kamaraj University, M a faculty in the department of ECE at Thiagarajar College of Engineering, Madurai and presently she is Optoelectronics and Electromagnetic Applications, Vol. 9, No. 2, Brazilian Microwave and Optoelectronics Society-SBMO received 22 April 2010; revised 15 July 2010; accepted SBMag © 2010 SBMO/SBMag 438ps) in parallel configuration, with one of them connected to variable optical fiber delay or FBG. This flexible tunability has been achieved by the use of the external delay element. The delay could be = 122, 92, 66, 42 and 20ps to vary FSR discretely from 41.1GHz to 50.23GHz in GHz. The results obtained are same for either optical fiber or FBG as delay element. Using FBGs, there is no need to manually change the fiber length to obtain flexible tunability. Also, the grating length required of FBG is very small compared to the length of fiber. The flexible tunable property of the filter was analyzed in terms of length of fiber delay and grating length of FBG and the results were factor of the proposed filter was measured. This makes the system compact and ACKNOWLEDGMENT The authors gratefully acknowledge the wonderful suggestions and greatly useful directions by Prof. Arokiaswami Alphones of Nanyang Technological University (NTU), Singapore. REFERENCES Microwave Photonics, CRC Press, Taylor & Francis Group, 2007,pg 26. R. Sukanesh, R.K.Jeyachitra, P. Gautham, A. Raja and Shailesh Ajmera, "Investigation of the techniques deployed in spectrum slicing for microwave photonic filters,`` in IEEE Proc. Int. Conf. Computation, R. Sukanesh, R.K.Jeyachitra, Shailesh Ajmera, K.Avinash, S.Manochandar, "Optical CAD tools for microwave Proc. Int. Conf. Mech. and Elect. Eng. (ICMEE) 2009, pp 93-98, Jul. 2009 J. Capmany, D. Pastor, B. Ortega, "Fiber optic microwave and millimeter-wave filter with high density sampling and very high sidelobe suppression using sub nanometer optical spectrum slicing,`` Electron. Lett, R.K.Jeyachitra, R.Sukanesh and Shailesh Ajmera,`` Flexible Tunable Spectrum Sliced Microwave Photonic Filter Using Pérot Filters and Fiber Delay``, Proc. of IEEE-Asia Pacific Microwave Conference Borja Vidal, Miguel A. Piqueras, Juan L. Corral, Javier Martí, "Tunable photonic microwave filter based on two Int. Topical Meeting on Microwave Photonics, Oct. 2005, pp. 205 Kenneth O. Hill, Gerald Meltz, "Fiber Bragg Grating Technology Fundamentals and Overview``, 1997. Applications of Nonlinear Fiber Optics, Academic Press, Elsevier, 2006 Lina ZHOU, Xinliang ZHANG, Enuming XU, "Q value analysis of microwave photonic filters``, China.vol. 2, no. 3, pp. 269-278, February 2009

Published

2010-08-01

How to Cite

R.K. Jeyachitra, & Dr. (Mrs.) R. Sukanesh. (2010). FLEXIBLE TUNABLE SPECTRUM SLICED MICROWAVE PHOTONIC FILTER USING PARALLEL FABRY-PÉROT FILTERS AND FIBER BRAGG GRATING. Journal of Microwaves, Optoelectronics and Electromagnetic Applications (JMOe), 9(2), 69-77. https://doi.org/10.1590/S2179-10742010000200001

Issue

Section

Regular Papers