Guided Wave Optics and Photonic Devices

13	Materials and Fabrication Technology of Rare-Earth-Doped Optical Fibres Mukul Chandra Paul, Somnath Bandyopadhyay, Mrinmay Pal, Palas Biswas and Kamal Dasgupta CSIR-Central Glass & Ceramic Research Institute

CONTENTS

13.1    Introduction

13.2    Why Photosensitivity?

13.3    Photosensitive Fibre Fabrication

13.3.1    Fabrication of GeO₂-Doped Fibre

13.3.2    Fabrication of Boron Co-Doped Germano-Silicate Cladding-Mode Suppressed Fibre

13.3.3    Characterization of Photosensitive Optical Fibres

13.4    In-Fibre Grating Writing Technique

13.4.1    Grating Written in Cladding-Mode Suppressed Fibre

13.5    Applications

13.5.1    Basic Principle of FBG Sensor

13.5.2    Gain-Flattening Technique of Erbium-Doped Fibre Amplifier by Chirped Bragg ...