Standard single - mode optical fiber material is introduced.

Single-mode fiber: center glass core very fine (core is commonly 9 or 10 μ m), can pass a pattern of light. Therefore, the die room dispersion is very small, for remote communication, but there are still some material dispersion and waveguide dispersion, such single-mode fiber to the light source spectrum width stability have higher requirement that spectrum width to narrow, better stability. Later found in 1.31 u m wavelength place, single-mode fiber material dispersion and waveguide dispersion for a positive and a negative, the size also just equal. So, 1.31 u m wavelength region became optical fiber communication a very ideal job window, is now practical optical fiber communication system the main work band 1.31 u m conventional single mode optical fiber is the main parameters by the international telecommunication union (ITU - T in G652 the proposed certain, so this kind of optical fiber is also called G652 optical fiber.

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