%0 Journal Article
%T Low-spatial-coherence broadband fiber source for speckle free imaging
%A Brandon Redding
%A Peyman Ahmadi
%A Vadim Mokan
%A Martin Seifert
%A Michael A. Choma
%A Hui Cao
%J Physics
%D 2015
%I arXiv
%X We designed and demonstrate a fiber-based amplified spontaneous emission (ASE) source with low spatial coherence, low temporal coherence, and high power per mode. ASE is produced by optically pumping a large gain core multimode fiber while minimizing optical feedback to avoid lasing. The fiber ASE source provides 270 mW of continuous wave emission, centered at {\lambda}=1055 nm with a full-width half-maximum bandwidth of 74 nm. The emission is distributed among as many as ~70 spatial modes, enabling efficient speckle suppression when combined with spectral compounding. Finally, we demonstrate speckle-free full field imaging using the fiber ASE source. The fiber ASE source provides a unique combination of high power per mode with both low spatial and low temporal coherence, making it an ideal source for full-field imaging and ranging applications.
%U http://arxiv.org/abs/1507.04788v1