Tapered Fiber Coupling
Tapered Fiber Coupling - Related Videos
09:39
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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Cited by 5 •
2013
We describe a method for in-situ tapering of As2S3 fibers to achieve efficient mid-infrared supercontinuum generation. By tapering while monitoring the supercontinuum’s spectrum, the spectral width can be maximized for a fiber taper. In-situ fiber tapering can be applied to optimize the performance of other fiber-based devices.
08:28
Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
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Cited by 6 •
2017
A protocol for the microfluidic spinning and microstructure characterization of regenerated silk fibroin monofilament is presented.
08:48
Writing Bragg Gratings in Multicore Fibers
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Cited by 3 •
2016
We describe a technique for inscribing identical fiber Bragg gratings into each core of a multicore fiber. This is achieved by introducing an additional surface into the optical path to mitigate lensing by the curved surface of the fiber cladding.
07:22
Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
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Cited by 2 •
2023
This protocol describes the construction of a low-cost, discrete, fiber-coupled, and air-spaced Fabry-Perot etalon with various applications, such as in trace-gas spectroscopy. The fabrication is possible in any facility with standard optical laboratory equipment available.
03:55
In Vivo Single-Fiber Recording of Sciatic Nerve C-Fibers in Rats
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2025
This video demonstrates a single-fiber recording of C-fiber nerve conduction in rats. An anesthetized rat is incised to expose the sciatic nerve, which provides sensory and motor supply to the lower limbs. The individual C-fibers are then exposed. Electrical stimulation is provided using stimulus electrodes implanted in the foot, and a response is recorded from a single nerve fiber.
FAQs
A gradual taper changes the fiber geometry slowly enough for the guided light to remain coupled as the diameter decreases. This adiabatic transition limits disruptive changes during transmission, allowing power to continue toward the target waveguide, resonator, or photonic device. The taper therefore supports efficient transfer while also creating the expanded mode needed for interaction with the surrounding structure.
As the fiber narrows, its guided mode extends farther outside the fiber, increasing the evanescent field in the surrounding medium. That field can respond to local changes in refractive index, absorption, or environmental conditions. Monitoring the resulting optical behavior allows the tapered structure to function as a sensitive sensing element rather than only as a coupling interface.
Taper design determines how strongly the guided mode expands and how well the taper preserves transmitted power. A smaller diameter increases interaction with a nearby optical structure, while a sufficiently gradual transition supports adiabatic transmission. Engineering the taper therefore requires attention to both mode overlap and the preservation of optical power during transfer.
The technique can transfer light between a fiber and several types of photonic structures, including another waveguide, an optical resonator, or a photonic device. The expanded mode helps create spatial overlap with the selected structure, while the gradual taper supports transmission. This makes the approach adaptable to different compact photonic coupling arrangements.
An engineering workflow can use the tapered section as the interface between a fiber and the selected waveguide, resonator, or photonic device. The design is evaluated through its power transfer, mode interaction, and response to the surrounding environment. These characteristics support compact photonic assemblies, laser coupling, sensing configurations, and device characterization.
Measurements can reveal changes associated with refractive index, absorption, or the local environment surrounding the tapered region. Because the expanded guided mode interacts strongly with that nearby medium, environmental changes can influence the optical response. Engineers can use this sensitivity to assess local conditions or characterize the behavior of an integrated photonic device.