Optical correlation-domain reflectometry without optical frequency shifter
Description
<jats:title>Abstract</jats:title> <jats:p>To achieve distributed reflectivity measurements along an optical fiber, we developed a simplified cost-effective configuration for optical correlation- (or coherence-) domain reflectometry based on a synthesized optical coherence function using sinusoidal modulation. By excluding the conventional optical heterodyne detection that accompanies the frequency shift (without using an acousto-optic modulator) and by exploiting the foot of the electrical Fresnel reflection spectrum, the electrical bandwidth required for signal processing is lowered to several megahertz. We evaluate the basic system performance and demonstrate its high-speed operation (10 ms for one scan) by tracking a moving reflection point in real time.</jats:p>
Journal
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- Applied Physics Express
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Applied Physics Express 9 (3), 032702-, 2016-02-12
IOP Publishing
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Details 詳細情報について
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- CRID
- 1360566399837925760
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- NII Article ID
- 210000137822
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- ISSN
- 18820786
- 18820778
- http://id.crossref.org/issn/18820786
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- Data Source
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- Crossref
- CiNii Articles
- KAKEN