The zero water peak non-dispersion shifted single mode fiber meets or exceeds the performance requirements of ITU-T G.652D and IEC 60793-2-50 Type B1.3 standards. It is suitable for transmission systems operating across the full wavelength range of 1260 nm to 1625 nm. The fiber eliminates the water peak near 1383 nm caused by hydroxyl absorption, extending transmission performance into the E-band (1380 nm to 1480 nm). Its attenuation and dispersion characteristics are optimized over the entire wavelength range, meeting the demands of multi-channel, high-speed transmission on a single fiber.