High Efficiency Raman Soliton Generation in Passive Silica Fiber
Bibliographic record
Abstract
Pulsed laser sources in the spectral window of 2 μm find many applications in engineering and science [1] . Thulium doped fiber lasers (TDFL) are especially attractive for this purpose with their emission in the 1.8-2.1 µm spectral range. The emission spectrum of a TDFL beyond 2.1 µm is also attainable with nonlinear approaches such as soliton self-frequency shift (SSFS) [2] , [3] . Previously, TDFL systems using SSFS have been demonstrated from thulium-doped fiber amplifiers (TDFA) pumped by tens of watts of continuous wave signal, leading to high-power femtosecond pulses (~100 kW, ~100 fs) [4] , [5] . However, such high-power systems are bulky and require external cooling mechanisms, as well as they lead to SSFS for a specific wavelength and pulse intensity. On the other hand, reports of TDFL with SSFS from passive fibers such as Ge-doped fibers require custom-made dispersion engineered fibers [6] . Here, we present a simple, all-fiber system that extends the wavelength reach of a TDFL from a passive, commercially available silica fiber. The system is tunable over 310 nm with an energy conversion efficiency up to 84.6%. To the best of our knowledge, this is the highest energy conversion efficiency ever reported in any SSFS system based on a passive fiber.
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How this classification was reachedexpand
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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".