Journal
ADVANCED OPTICAL MATERIALS
Volume 7, Issue 20, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201900602
Keywords
lab on fiber; two-photon lithography; vapor sensing; whispering gallery microcavities
Categories
Funding
- National Natural Science Foundation of China [61735002, 11474206, 11404224, 1174243, 11774246]
- Youth Innovative Research Team of Capital Normal University [008/19530050146]
- Beijing Nova Program [Z161100004916100]
- Capacity Building for Sci-Tech Innovation-Fundamental Scientific Research Funds [008/19530050170, 008/19530050180, 008/18530500186, 025185305000/142]
- National Key R&D Program of China [2016YFA0301302]
- NSFC [61435001, 11474011, 11654003, 11527901]
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The further development of lab on fiber technology demands more powerful optical microsystems and optical fibers with special functions to create sensors with better performance. Whispering gallery microcavities (WGMs) made of different materials with high quality factors show very good sensitivity to gases, nanoparticles, and biocomponents. However, realizing the excitation and detection of the resonant modes of WGMs on the facets of optical fibers is still a great challenge. This work employs the advanced 3D manufacturing technology of two-photon lithography to fabricate an optical microsystem on the end facet of a multicore optical fiber, which enables excitation and detection of whispering gallery modes on the end facet of an optical fiber. Whispering gallery modes with high quality factors are observed, and the sensing characterization of this device for vapors of three types of volatile organic compounds is investigated. Such optical fiber vapor sensors can be applied in the fields of medical care, environmental monitoring and chemical manufacturing. Additionally, the out-of-plane light coupling strategy may be useful for the design of integrated optical circuits on chips.
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