Speckle-pattern contrast of semiconductor laser propagating in a multimode optical fiber |
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| Authors: | Masaaki Imai Yoshihiro Ohtsuka |
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| Institution: | Department of Engineering Science, Faculty of Engineering, Hokkaido University, Sapporo 060, Japan |
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| Abstract: | Speckle patterns produced by coherent light from a GaA1As double-hetero-structure laser diode that has been transmitted through a multi-mode optical fiber are experimentally studied by analyzing the average contrast. It has been found that the speckle contrast observed in the far-field region is significantly lowered when the spectral width of a laser diode is as broad as a few tens of Angstroms. |
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