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Schematic band diagram of a single period of the IC laser structure under a bias voltage.
The dependence of the EL quantum energy on the bias voltage for a regular IC laser (triangles) and tunable IC laser (circles). The inset shows the EL spectrum at low bias current.
ASE and laser spectra of the tunable IC laser (a) and regular IC laser (b) at different bias currents. The inset in the panel (a) shows the modal gain spectrum of the tunable IC laser.
Lasing spectra of the tunable IC laser at different values of the injection current.
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