A tunable semiconductor laser device is presented. The device comprises a laser structure formed by at least two waveguides and an active region located within at least a segment of one of the waveguides; and comprises a tunable spectral filter optically coupled to the laser structure. The tunable spectral filter includes at least two filtering elements, at least one of them being a microring cavity.

 
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< Power control circuit for optical information recording device

< High-power narrow-linewidth single-frequency laser

> External cavity laser with dispersion compensation for mode-hop-free tuning

> Optically pumped semiconductor ring laser

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