Fig. 2 | Nature Communications

Fig. 2

From: An InP-based vortex beam emitter with monolithically integrated laser

Fig. 2

L–I characteristics and polarization. a L–I characteristics of DFB laser output power (black) and OAM emission (magenta). Insets show near-field patterns of the integrated OAM laser at different pumping currents IP. b Spectrum of DFB laser at different pump current. c Intensity distribution of the emitted beam. d–g Intensity distributions with the polarization indicated by the arrows

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