Fiber Optic Preform Market (By Process: OVD, VAD, PCVD, MCVD; By Product Type: Single-Mode Fiber Optic, Multi-Mode Fiber Optic, Plastic Optical Fiber Optic; By End-user: Telecom, Oil & Gas, Military & Aerospace, BFSI, Medical, Railway, Others) - Global Industry Analysis, Market Size, Opportunities and Forecast, 2018 - 2026