Method and apparatus for optical signal analysis using a gated modulation source and an optical delay circuit to achieve a self-homodyne receiver
文献类型：专利
| 作者 | BANEY, DOUGLAS M.; SORIN, WAYNE V. |
| 发表日期 | 1989-08-22 |
| 专利号 | US4859843 |
| 著作权人 | AGILENT TECHNOLOGIES INC. |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Method and apparatus for optical signal analysis using a gated modulation source and an optical delay circuit to achieve a self-homodyne receiver |
| 英文摘要 | An actual optical field spectrum is mixed down to baseband and can be observed directly to measure the optical field spectrum of an optical signal based on a local oscillator approach. This local oscillator approach is achieved without adding an additional local oscillator. A single optical source, such as a laser, is controlled by a modulation source for selectively modulating the optical signal produced by the optical source. Accordingly, the optical signal produced by the optical source alternates between two states, namely, an unmodulated state and a modulated state which carries the optical field spectrum of interest. Preferably, the optical signal produced by the optical source is routed to an optical conduit in parallel with an optical delay line. Although the two states of the optical signal produced by the optical source occur sequentially in time, they are mixed together concurrently after being channeled through the parallel optical circuit comprising the optical conduit and the optical delay line. The unmodulated state of the optical signal produced by the optical source serves as a local oscillator signal. The parallel combination of the optical conduit and the optical delay line together with a photodetector functions as a self-homodyne receiver when fed the unmodulated and modulated states of the optical signal produced by the optical source. The self-homodyned mixing of the unmodulated and modulated states of the optical signal produced by the optical source serves to frequency-translate the optical power spectrum to within the bandwidth of an analyzer, such as a microwave spectrum analyzer. |
| 公开日期 | 1989-08-22 |
| 申请日期 | 1988-01-22 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/34409]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | AGILENT TECHNOLOGIES INC. |
| 推荐引用方式 GB/T 7714 | BANEY, DOUGLAS M.,SORIN, WAYNE V.. Method and apparatus for optical signal analysis using a gated modulation source and an optical delay circuit to achieve a self-homodyne receiver. US4859843. 1989-08-22. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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