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    • 2. 发明申请
    • REFLECTION-TYPE OPTICAL MODULATOR MODULE
    • 反射型光学调制器模块
    • US20080137178A1
    • 2008-06-12
    • US11949934
    • 2007-12-04
    • Yong Duck CHUNGKwang Seong CHOIJae Sik SIMJe Ha KIM
    • Yong Duck CHUNGKwang Seong CHOIJae Sik SIMJe Ha KIM
    • G02F1/00
    • G02F1/025G02F2203/02H01S5/0265
    • Provided is a reflection-type optical modulation module. According to the reflection-type optical modulation module, an anti-reflective thin film is formed on the optical input/output side surface of a waveguide to reduce optical coupling loss, and also a high-reflective thin film is formed on the opposite side surface to feed back a modulated optical signal. Thus, even when the length of an absorption layer is shortened, a sufficient optical path length is available, and it is possible to obtain a sufficient extinction ratio. Since the optical path length is sufficiently long despite a reduction in the length of the device, capacitance is reduced, and high-speed operation is enabled. In addition, only one lensed optical fiber for optical input and output is used, and thus it is possible to reduce production cost and the number of installation processes. Furthermore, a small-sized and low-priced optical amplifier, instead of an external amplifier which is high priced and has a large volume, is integrated with an optical modulator so that production cost can be further reduced.
    • 提供了一种反射型光调制模块。 根据反射型光调制模块,在波导的光输入/输出侧表面上形成抗反射薄膜以减少光耦合损耗,并且在相对侧表面上形成高反射薄膜 以反馈调制的光信号。 因此,即使缩短吸收层的长度,也可以获得足够的光路长度,可以获得足够的消光比。 由于尽管器件的长度减小,光路长度足够长,但是电容减小,并且能够进行高速操作。 此外,仅使用一个用于光输入和输出的透镜光纤,因此可以降低生产成本和安装过程的数量。 此外,小尺寸和低价格的光放大器代替高价格并且具有大体积的外部放大器与光调制器集成,从而可以进一步降低生产成本。