Integrated-optic variable delay line and its application to a low-coherence reflectometer.
Integrated-optic variable delay line and its application to a low-coherence reflectometer.
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集成光学可变延迟线及其在低相干反射计中的应用。
DOI：
10.1364/ol.30.002739
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发表时间：
2005
期刊：
影响因子：
3.6
通讯作者：
H. Takahashi
中科院分区：
文献类型：
--
作者：
K. Takiguchi;M. Itoh;H. Takahashi
我们提出了一种基于平面光波电路技术的大规模可变延迟线及其在光学低相干反射计中作为参考臂的应用。该可变延迟线由夹在 2 个光开关之间的 16 个不对称延迟臂对组成，这些光开关选择所需延迟的路径。这种配置使我们能够消除反射计中移动部件的需要。我们可以在空气中以小于 1.0 微米的步长扫描长度为 262.1 毫米的参考臂，并实现约 -47 dB 的反射计灵敏度。
We propose a large-scale variable delay line based on planar light-wave circuit technology and its application as a reference arm in an optical low-coherence reflectometer. This variable delay line is composed of 16 asymmetrical delay arm pairs sandwiched between 2 optical switches, which select the path for a needed delay. This configuration enables us to eliminate the need for a moving part in the reflectometer. We can scan the reference arm over a length of 262.1 mm with a step of less than 1.0 microm in air and achieve reflectometer sensitivity of about -47 dB.