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We report the development and characterization of an efficient diode-pumped surface-emitting semiconductor laser operating at approximately 870 nm. By using a semiconductor Bragg reflector stack/multiple GaAs quantum well structure, mounted within a conventional laser cavity, we achieved single transverse mode laser output powers of 153 mW. Self-tuning over a 15-nm spectral range has been obtained.

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FBG can improve the spectral efficiency of mmwave fiber-radio systems employing wavelength interleaving and optical single-sideband modulation. Our results demonstrate the effectiveness of the FBG in dropping the required carrier wavelength and sideband. In addition excellent isolation between the added and dropped channels was demonstrated when the FBG was employed in asystem incorporatingbathaddanddropconfigurations. We are now investigating the aptimilation of the grating in order to improve the rolloff of the transmission notches and minimize transmission amplitude ripples. References1. G. Smith, D. Novak and C. Lim,"A millimeter-wave full duplex fiber radio star-tree architecture incorporating WDM and SCM," IEEE Photon. Tech. Lett. vol. 10, pp. 1 6 5 6 1652 (1998). 2. H. Schmuck, "Comparison of optical miL limeter-wave system concepts with regard to chromaticdispersion:'Electron.