Magnetic field tunability of optical microfiber taper integrated with ferrofluid.
This engineering study reports theoretical analysis and experimental demonstration of an S-tapered optical microfiber integrated with ferrofluid for magnetic-field tunability. The transmission spectrum and dip wavelengths were found to vary with magnetic-field intensity, with a Langevin-like response and a linear loss–field relationship over 25–200 Oe. The work is presented as enabling tunable all-in-fiber photonic components (e.g., modulators, filters, sensors).
Key points
- An S-tapered optical microfiber was fabricated using fusion splicing and integrated with ferrofluid.
- Spectral characteristics were analyzed theoretically and demonstrated experimentally under different magnetic-field intensities.
- Transmission and dip wavelengths were reported to be adjustable by changing magnetic field intensity.
- The device response to magnetic field intensity was described as exhibiting a Langevin function.
- A linear relationship between transmission loss and magnetic field intensity was reported for 25–200 Oe.
- Reported sensitivities were 0.13056 dB/Oe (loss) and 0.056 nm/Oe (wavelength shift).
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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