An active multimode interferometer (MMI) laser diode (LD) concept is presented, which has been verified via a 1.48 µm high power application. The active MMI-LDs, having a larger pumping area compared to that of regular single-stripe LDs with the same length, showed no significant degradation in slope efficiency and up to 50 mW power improvement resulting in 170 mW saturated output power.
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Hamamoto et al. (2000) studied this question.
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