Speak To Analyst Fiber Optic Preform Market Size, Share & Trends Analysis Report by Process (Outside Vapor Deposition (OVD), Vapor Axial Deposition (VAD), Plasma Activated Chemical Vapor Deposition (PCVD), and Modified Chemical Vapor Deposition (MCVD)), by Product Type (Single-Mode, Multi-Mode, and Plastic Optical Fiber), and by End-User (Telecom, Oil & Gas, Military & Aerospace, BFSI, Medical, and Others) Forecast Period (2024-2031)