A remotely-pumped 130-W 1178-nm single-frequency linearly-polarized Raman fiber amplifier
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Bibliographic record
Abstract
Remotely pumped by a single-mode, polarization-maintaining (PM) 1120-nm fiber laser, a single-frequency linearly-polarized 1178-nm Raman fiber amplifier (RFA) has been developed with a maximum continuous-wave (CW) output power of 130-W. This remotely-pumped high-power RFA system features the same modular, compact and ruggedized design as the proven SodiumStar 20/2 and provides the potential for a guide star laser with a 589-nm output power approaching 100-W, assuming a 10 to15% D2b sideband content and a typical overall conversion efficiency of a resonant second harmonic generator of ~ 70%. Utilizing innovative patented remote pump delivery technology, the 589-nm laser head (LH), which includes the RFA itself, can now be separated physically from the electronics cabinet (EC), which hosts the bulky and heat-generating control electronics, the 1178-nm seed laser, the fiber laser power supply and the fiber laser pump module. The physical separation distance from the LH to the EC can now be as long as 30-m for a 130-W RFA and up to 50-m for a 100-W RFA. The remote pumping capability of this high-power RFA offers important system configuration flexibility and is well-suited for laser guide star assisted adaptive optics systems in ground-based large-aperture astronomical telescopes, optical ground stations and space debris tracking systems, particularly when the available laser launching platform space is strictly limited.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.002 |
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