Modification of the Optical Performance of Fiber Bragg Gratings Using Femtosecond Laser Micromachining
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Bibliographic record
Abstract
This paper describes the use of femtosecond laser pulses to selectively modify the optical performance of as-fabricated fiber Bragg gratings (FBG) written in single mode optical fibers. As a result of the irradiation of FBGs by femtosecond laser pulses generated from a Ti:Sapphire amplifier, the resonance Bragg wavelength is changed, or split into two separate individual wavelengths. In addition, the bandwidth of the reflection peak is increased. Further analyses show that a change of 6.0910 -4 in the refractive index is achieved in a single pass of the laser beam. Periodic microgrooves are also inscribed along the fiber using femtosecond pulses. In addition to the optical performance, the sensing performance of the FBGs is increased by inscription of periodic microgrooves in the cladding of the fiber. The micromachined fibers are used for simultaneous measurement of temperature and concentration of liquids.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it