Distributed feedback semiconductor laser device and...

Details Distributed feedback semiconductor laser device and... Distributed feedback semiconductor laser device and...

H - Electricity

01

S

H01S 5/12 (2006.01) H01S 5/22 (2006.01) H04J 14/02 (2006.01) H01S 5/40 (2006.01)

Patent

CA 2332523

A distributed feedback semiconductor laser device including an active layer, a diffraction grating disposed in a vicinity of the active layer and having a substantially uniform space period and a distributed feedback function, and a functional layer disposed in a vicinity of the diffraction grating and the active layer and having a function of controlling a refractive index of the active layer, whereby the functional layer controls a lasing wavelength of the active layer. The functional layer of controlling the refractive index of the distributed feedback semiconductor laser device can generate a plurality of the lasing wavelengths different among one another and easily controllable.

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