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In this paper, we fabricate a microfiber coupler (MFC) functionalized with Teflon thin film. Since Teflon has a negative thermo-optic coefficient, it can compensate for the thermal effects of silica. The temperature dependence of the MFC depends on the radius of microfiber which controls the thermal effect contributions of silica and polymer. The device we fabricate has the temperature sensitivity...
In this paper, we utilize a microfiber coupler (MFC) to realize the measurement of the microfluidic flow rate. A glass capillary is chosen as the microfluidic channel. The capillary is coated with gold film. The MFC is wrapped around the gold film which is to heat the device. One kind of UV adhesive is selected to package the device and isolate it from the ambient. The flow rate of the microfluidics...
We present a compact highly sensitive microfiber coupler-based twist sensor formed by fusing and tapering two optical fibers and then connecting two of the pigtails to form a Sagnac loop. The device is miniature, low cost, and easily fabricated. The sensor has high twist sensitivities of $\sim 0.9$ nm/° when measuring wavelength shift and $\sim 0.16$ dB/° when measuring transmission power, both...
In this paper, we demonstrate a compact Sagnac loop based on microfiber coupler which has a potential in application of laser, communication and sensing. As an example, a thermometer based on this structure is fabricated and shows a good temperature sensitivity.
A simple and compact Erbium-doped fiber laser is demonstrated with two Sagnac loops formed by a 3×3 microfiber coupler. By fusing two ports on each side of the 3 ×3 microfiber coupler and embedding a 90 cm Erbium-doped fiber in one loop, a stable laser output is achieved at 1530 nm region with an optical signal to noise ratio of ~40 dB using a 980-nm pump. Taking advantage of the large evanescent...
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