Axial profile of grating coupled radiation from second-order DFBlasers with phase shifts |
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Authors: | Kinoshita J.-I. |
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Affiliation: | Toshiba Corp., Yokohama; |
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Abstract: | Axial profiles of the grating-coupled radiation field emitted in a direction normal to the surface of distributed-feedback (DFB) lasers with phase-shifted second-order corrugation are theoretically analyzed. The profiles are calculated for nonreflecting DFB lasers with the following phase shifts: λ/4 shift, two λ/8 shifts, and two 3λ/8 shifts. It is demonstrated that the radiation field can be controlled by changing the phase shifts. This result suggests a new method for modulating the surface emission of a DFB laser |
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