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    • 84. 发明授权
    • Optical modulator
    • 光调制器
    • US08467635B2
    • 2013-06-18
    • US13129680
    • 2009-12-02
    • Yoshiyuki DoiTakashi YamadaYohei SakamakiAkimasa Kaneko
    • Yoshiyuki DoiTakashi YamadaYohei SakamakiAkimasa Kaneko
    • G02F1/035G02F1/225
    • G02F1/225G02F1/2257G02F2001/212G02F2001/217G02F2202/09G02F2202/20G02F2202/28G02F2203/20G02F2203/21
    • An optical modulator having a high stability is provided. In the optical modulator according to the present invention, a phase modulation by an electro-optic effect is made on an optical substrate of an electro-optic material while the setting of an operating point by a thermal-optic effect is made on a planar lightwave circuit (PLC) substrate of quartz, silicon, or the like. Such configuration can suppress the influence of thermal drift or the like because no heat is applied directly to the optical substrate of the electro-optic material. In addition, breakage and warpage of the substrate due to heat are also mitigated. Further, quartz used for the PLC has a low thermal conductivity, approximately one-fifth of that of the LN substrate (approximately 1 W/(m·K)), and therefore, a desired phase difference can be maintained with a low power consumption, and thus, the operating point becomes stabilized.
    • 提供了具有高稳定性的光调制器。 在根据本发明的光调制器中,在电光材料的光学基板上进行通过电光效应的相位调制,同时通过热光学效应设置工作点在平面光波 石英,硅等的电路(PLC)基板。 这种构造可以抑制热漂移等的影响,因为没有热直接施加到电光材料的光学基板。 此外,还减轻了由于热而引起的基板的断裂和翘曲。 此外,用于PLC的石英具有低导热性,大约是LN衬底的约五分之一(约1W /(m·K)),因此可以以低功耗维持期望的相位差 因此,工作点变得稳定。