Single-Mode Multicore Fibers With Integrated Bragg Filters

被引:13
|
作者
Becker, Martin [1 ]
Lorenz, Adrian [1 ]
Elsmann, Tino [1 ]
Latka, Ines [1 ]
Schwuchow, Anka [1 ]
Dochow, Sebastian [1 ]
Spittel, Ron [1 ]
Kobelke, Jens [1 ]
Bierlich, Joerg [1 ]
Schuster, Kay [1 ]
Rothhardt, Manfred [1 ]
Bartelt, Hartmut [1 ]
机构
[1] Leibniz Inst Photon Technol, D-07745 Jena, Germany
关键词
Bragg filter; microstructured optical fiber; optical fiber filters; two-beam interferometry; OPTICAL-FIBERS; PHASE MASK; GRATINGS; SPECTROSCOPY; WAVELENGTH; MULTIMODE; PROBE;
D O I
10.1109/JLT.2016.2532382
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Fiber Bragg gratings (FBGs) in single-mode fibers, used as narrowband filters, have reached a high maturity level, especially for applications in telecommunications and sensing. In spectroscopic applications, e.g., in Raman spectroscopy, FBG filters can be used to separate laser probing light from generated sensor light which simplifies Raman probes. For this purpose, light from a sample has to be collected with high efficiency into a fiber. The light collection efficiency in single-mode fibers is, however, strongly limited due to the small fiber core area. Therefore, we have investigated the possibility to use single-mode multicore fibers to increase the light collection efficiency while maintaining Bragg filter performance. An optical density filtering effect of 1.5, which is equivalent to a transmission of -15 dB, has been achieved with a FBG in a 61-core fiber. Simulations have been performed in order to clarify the influence of the fiber geometry and refractive index distribution on grating performance. The application of chirped gratings in the multicore fibers improves filter performance in comparison to homogeneous gratings.
引用
收藏
页码:4572 / 4578
页数:7
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