CHAPTER 13

Fused Fiber Couplers: Fabrication, Modeling, and Applications

Bishnu P. Pal*, P. Roy Chaudhuri, M.R. Shenoy and Naveen Kumar,     Physics Department, Indian Institute of Technology Delhi, New Delhi, India

1 INTRODUCTION

Development of broadband optical fiber amplifiers in the form of erbium-doped fiber amplifiers (EDFAs), which led to the birth of the era of wavelength division multiplexing (WDM) technology in the mid-1990s, ushered in a revolution in optical fiber communication. WDM technology, more precisely known as dense WDM (DWDM) technology, involving simultaneous transmission of at least four wavelengths in the 1550-nm low-loss wavelength window through one single-mode fiber has indeed resulted in an enormous increase in ...

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