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发明授权
CN104541196B 光调制电路 有权

光调制电路
摘要：
本发明的光调制电路的特征在于，具备：第一马赫‑曾德尔调制部，其具有第一输出口及第二输出口，并由主信号来推挽驱动；第二马赫‑曾德尔调制部，其与第一马赫‑曾德尔调制部的第一输出口连接，并由修正信号来推挽驱动；以及非对称光耦合部，其以光强度耦合比r：1－r对从第二马赫‑曾德尔调制部的输出口输出的光信号、和从第一马赫‑曾德尔调制部的第二输出口输出的光信号进行耦合，其中，从第一输出口到非对称光耦合部的光路长度和从第二输出口到非对称光耦合部的光路长度大致相等。
摘要（英）：

An optical modulation circuit includes: a first Mach-Zehnder modulating portion including a first output port and a second output port, wherein the first Mach-Zehnder modulating portion is push-pull driven by a main signal; a second Mach-Zehnder modulating portion connected to the first output port of the first Mach-Zehnder modulating portion, wherein the second Mach-Zehnder modulating portion is push-pull driven by a correction signal; and an asymmetric light combining portion combining an optical signal outputted from an output port of the second Mach-Zehnder modulating portion with an optical signal outputted from the second output port of the first Mach-Zehnder modulating portion in a light intensity coupling ratio of r to 1−r, wherein an optical path length from the first output port to the asymmetric light combining portion is substantially equal to an optical path length from the second output port to the asymmetric light combining portion.

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