A novel approach to optical millimeter-wave (MM-wave) transmission based on laser heterodyning is presented. The use of a dual-polarization emitting external-cavity diode laser (DP-ECDL) combined with the intrinsic polarization sensitivity of standard lithium-niobate Mach-Zehnder interferometer modulator offers a simple and flexible transmitter configuration. The MM-wave signal generated by photomixing of the two wavelength-tunable laser modes of the DP-ECDL has been stabilized by employing a servo loop scheme and sideband injection locking. Penalty-free transmission of 200-Mb/s binary-amplitude shift keying and 50-Mb/s binary phase-shift keying over 25 km of standard single-mode fiber at MM-wave carrier frequency is demonstrated.
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Pajarola et al. (1999) studied this question.
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