A method of modulating a laser device having an integrated modulator can include: emitting laser light from a primary laser cavity having quantum wells; passing the laser light through a modulator cavity having at least one modulator quantum well that is coupled with the primary laser cavity and integrated with the laser device; and biasing the modulator cavity so as to deconfine electron and/or hole wavefunctions in the at least one modulator quantum well of the modulator cavity such that the refractive index and absorption of the modulator cavity changes to modulate the laser light passing through the modulator. The method can include at least partially containing the deconfined electron and/or hole wavefunctions in a secondary modulator well region adjacent to a primary modulator well region, the primary modulator well region containing the at least one modulator quantum well.
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