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Study on Kinks in P-I Characteristic Curves of Semiconductor Quantum-well Stripe Geometry Lasers

It was discovered that P I characteristic curve of the narrow stripe semiconductor lasers appear the kinks.This effect will negatively affect the coupling between laser and fiber.We found that the kinks are relatived to the laser structures.The kinks have been avoided from optimizing the longitudinal structure,adopting narrow active region and using C as p dopant for the lasers operating at 50 mW with 100 mA injection.