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Frontiers in Guided Wave Optics and Optoelectronics Part 2

Tham khảo tài liệu 'frontiers in guided wave optics and optoelectronics part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Application Specific Optical Fibers 25 Fig. 21. a Optical micrograph of the cross section of a solid core Bragg fiber fabricated through MCVD technology b Nonlinear spectral broadening in 3 cm of this Bragg fiber showing the input spectrum and for 19 kW 59 kW and 82 kW of launched peak powers from an optical parametric amplifier OPA . OPA was tuned to 1067 nm and FWHM of the launched pulse was 120 fs After Bookey et al 2009 2009 OSA . 6. Conclusion In this chapter we have attempted to provide a unified summary description of the most important propagation characteristics of an optical fiber followed by discussion on several variety of special fibers for realizing fiber amplifiers dispersion compensating fibers microstructured optical fibers and so on. Even though huge progress has been made on development of optical fibers for telecom application a need for developing special fibers not necessarily for telecom alone has arisen. This chapter was an effort to describe some of these special fibers. Detailed discussions are given on our own work related to inherently gain-flattened EDFA DCFs of large mode effective area index-guided MOF and Bragg fibers for realizing dispersion compensation for metro network centric applications and for generating super continuum light. 7. Acknowledgement The author acknowledges many interesting discussions and exchange of ideas in the course of gathering cumulative knowledge in this field with his colleagues Ajoy Ghatak M. R. Shenoy K. Thyagarajan and Ravi Varshney. He is also grateful to his graduate students namely Sonali Dasgupta B. Nagaraju and Kamna Pande for many fruitful discussions during their thesis work which led to several publications with them on specialty fibers which are referred to in this chapter. Manu Mehta carried out and executed many of the design calculations as part of her M.Tech. Dissertation at our Institute on application specific index guided holey fiber structures which were based on use of the CUDOS .