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Bragg grating fabrication with wide range coarse and fine wavelength control
Optics Express
|November 18, 2014
Summary
A novel phase-controlled interferometric method precisely fabricates Bragg gratings. This technique allows for accurate determination of fiber Sellmeier coefficients across a wide wavelength range.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Bragg gratings are crucial optical components.
- Precise control over Bragg wavelength is essential for various applications.
- Existing fabrication methods may lack fine-tuning capabilities.
Purpose of the Study:
- To demonstrate a phase-controlled interferometric method for Bragg grating fabrication.
- To achieve both coarse and fine tuning of Bragg wavelengths.
- To accurately determine fiber Sellmeier coefficients.
Main Methods:
- Utilizing a phase-controlled interferometric approach.
- Fabricating multiple Bragg reflectors in a single fiber device.
- Implementing coarse wavelength control and fine wavelength setting.
Main Results:
- Achieved ~113 nm FWHM bandwidth centered at ~1545 nm.
- Achieved ~174 nm FWHM bandwidth centered at ~2005 nm.
- Determined fiber Sellmeier coefficients with a mean squared error <3.5 × 10(-9).
Conclusions:
- The demonstrated method offers precise control over Bragg grating fabrication.
- The technique enables accurate characterization of optical fibers.
- This advancement has implications for optical sensing and telecommunications.
