Abstract
Single-mode (SM) rare-earth-doped fiber lasers and amplifiers are compact, rugged optical sources with diffraction-limited beam quality. SM fiber sources have found limited use in pulsed applications, however, due to the low energy storage determined by amplified spontaneous emission (ASE) and to the onset of nonlinear processes. Both limiting factors can be mitigated by increasing the fiber core diameter (dcore), which reduces ASE and raises the threshold power for nonlinear processes. Large-dcore fibers can support many transverse modes, however, which compromises the beam quality.1
© 2002 Optical Society of America
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