ACTIVE LAYER DISCRETE TYPE PHASE SHIFT DFB LASER

摘要

PROBLEM TO BE SOLVED: To provide an active layer discrete type phase shift DFB laser with particularly high forward optical output and high single mode characteristic, among small DFB lasers with low power consumption.

SOLUTION: The active layer discrete type phase shift DFB laser includes a non-continuously discrete active layer with a quantum well active layer etched at regular intervals. A part of a DFB resonator formed by the active layer is provided with a phase shift of λ/10 to λ/4 inclusive in shift amount.

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