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 pr
题目内容(请给出正确答案)
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.
