Generation of optical millimeter-wave with a widely tunable carrier using Fabry-Perot grating-lens external cavity laser

A novel scheme to generate a 119-GHz optical millimeter-wave using a 1.5-mu m Fabry-Perot (FP) grating-lens external cavity laser has been experimenta lly demonstrated, The millimeter-wave has been produced by optical heterody ne of two wavelengths in the collinear and linearly polarized output of the laser, The signal frequency is precisely controlled by a FP filter, Optica l carrier of the wave can be tuned over a 61-nm wavelength range, The milli meter-wave has been successfully transmitted over a 25-km fiber link, This source can be used in the millimeter-wave wavelength-division-multiple-acce ss networks.