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High Power Pulse Lasers For Fiber Optic Measurements

Optical coupling of a high power pulse operating heterostructure broad contact laser with an optical fiber has been investigated.The optical fiber was of a multimode gradient type with the core diameter 50 μm and 200 μm and butt-ended.The efficiency of such coupling has been found to be 12% and 44%, respectively and might vary significantly when the fiber was displaced with respect to the laser emission area.Experimental data are compared with the theoretical predictions. The high power lasers equipped with optical fiber pig tails can be useful for numerous applications in the fiber optic technology.In particular they can be recommended as a signal source in the fiber optic measurement systems.Parameters of such lasers and the output power versus current characteristics are described in the paper.