| 发明名称 | Optical transmitter and control apparatus of optical modulator | ||
| 摘要 | An optical transmitter includes an optical modulator to modulate light output from a light source with a drive signal, a monitor to detect an average value and an alternating-current (AC) component of output light intensity of the optical modulator, and a controller to select one of a first bias control and a second bias control in accordance with an amplitude of the drive signal. The first bias control controls a bias voltage of the drive signal based on the average value, and the second bias control controls the bias voltage of the drive signal based on the AC component. | ||
| 申请公布号 | US9450677(B2) | 申请公布日期 | 2016.09.20 |
| 申请号 | US201414575020 | 申请日期 | 2014.12.18 |
| 申请人 | FUJITSU OPTICAL COMPONENTS LIMITED | 发明人 | Akashi Tamotsu |
| 分类号 | H04B10/50;H04B10/40 | 主分类号 | H04B10/50 |
| 代理机构 | Staas & Halsey LLP | 代理人 | Staas & Halsey LLP |
| 主权项 | 1. An optical transmitter comprising: an optical modulator configured to modulate light output from a light source with a drive signal to output the modulated light; a monitor configured to detect an average value and an alternating-current (AC) component of output light intensity of the optical modulator; and a controller configured to select one of a first bias control and a second bias control in accordance with an amplitude of the drive signal, the first bias control controlling a bias voltage of the drive signal based on the average value, and the second bias control controlling the bias voltage of the drive signal based on the AC component, wherein the first bias control controls a bias of the drive signal such that the average value becomes maximum or minimum, and the second bias control controls a bias of the drive signal such that the AC component becomes minimum. | ||
| 地址 | Kawasaki JP | ||