问题

How is a Thin Film filter fabricated?（

How is a Thin Film filter fabricated?（）

A The glass core is doped with an Erbium in periodic segments of the fiber.
B Layers of high index ?and low index ?material are deposited on a glass substrate.
C Thin layers of silica glass are placed onto wafers to produce a prism-like effect.
D Fiber is etched with an ultraviolet laser that is precisely spaced for specific wavelength filtering.

参考答案

参考解析：

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