Conference paper
Low-NA single-mode LMA photonic crystal fiber amplifier
Abstract
Enabling Single-Mode (SM) operation in Large-Mode-Area (LMA) fiber amplifiers and lasers is critical, since a SM output ensures high beam quality and excellent pointing stability. In this paper, we demonstrate and test a new design approach for achieving ultra-low NA SM rod fibers by using a spatially Distributed Mode Filter (DMF).
This approach achieves SM performance in a short and straight rod fiber and allows preform tolerances to be compensated during draw. A low-NA SM rod fiber amplifier having a mode field diameter of ~60μm at 1064nm and a pump absorption of 27dB/m at 976nm is demonstrated.
| Language: | English |
|---|---|
| Year: | 2011 |
| Pages: | 79141S-9 |
| Proceedings: | Fiber Lasers 8 |
| ISSN: | 1996756x and 0277786x |
| Types: | Conference paper |
| DOI: | 10.1117/12.874545 |
| ORCIDs: | Broeng, Jes |
