| Zdroj: |
Hauge, J M, Papior, S R, Pedersen, J E, Christensen, S L, Bondu, M, Alkeskjold, T T & Lægsgaard, J 2019, Narrow-linewidth all-solid large-mode-area photonic crystal fiber amplifier . in Proceedings of spie . vol. 10897, 1089728, SPIE-International Society for Optical Engineering, Proceedings of SPIE-The International Society for Optical Engineering, SPIE Photonics West 2019, San Francisco, California, United States, 02/02/2019 . https://doi.org/10.1117/12.2506246 |
| Popis: |
Large-mode-area (LMA) photonic crystal fiber (PCF) amplifiers are attractive for high-power amplification of single-mode (SM) narrow-linewidth light. Traditionally, LMA PCF designs include air holes but splicing and interfacing of fibers with air holes is complicated. Recently, this was addressed with the development of a LMA PCF amplifier fiber without air holes but with SM operation maintained. This all-solid fiber can be spliced with standard splicers and thus enables integration of PCFs into all-fiber monolithic laser systems. The new fiber, named DC-250/30-PM-Yb-FUD, is demonstrated in a free-space configuration for high-power amplification of 1064 nm light with a narrow linewidth of less than 20 kHz. A seed power of 380 mW is amplified to 40 W, corresponding to a single-stage gain of 20 dB, with an optical to optical efficiency of 69%. No indication of stimulated Brillouin scattering is observed, and the output is stable during frequency modulation of the seed laser. |
