Straight Waveguide Phase Modulator Market (By Type: Frequency: Below 1GHz, Frequency: 1-5GHz, Frequency: 5-10GHz, and Frequency: Above 10GHz; By Application: Optical Communication, Radio Frequency, and Others; By Region: North America, Europe, Asia Pacific, Latin America, and Middle East & Africa) Industry Size, Share, Growth, Trends 2025 to 2034.