Title :
Dual-polarization external-cavity diode laser transmitter for fiber-optic antenna remote feeding
Author :
Pajarola, S. ; Guekos, G. ; Nizzola, P. ; Kawaguchi, H.
Author_Institution :
Inst. of Quantum Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland
fDate :
7/1/1999 12:00:00 AM
Abstract :
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
Keywords :
Mach-Zehnder interferometers; amplitude shift keying; digital communication; electro-optical modulation; laser beam applications; laser cavity resonators; laser modes; laser stability; laser tuning; light polarisation; microwave links; microwave photonics; millimetre wave antennas; millimetre wave generation; multiwave mixing; optical fibre communication; optical transmitters; phase shift keying; semiconductor lasers; 200 Mbit/s; 25 km; 50 Mbit/s; LiNbO3; MM-wave carrier frequency; MM-wave signal generation; Mach-Zehnder interferometer modulator; binary ASK; binary PSK; binary amplitude shift keying; binary phase-shift keying; dual-polarization LD transmitter; external-cavity diode laser transmitter; fiber-optic antenna remote feeding; laser heterodyning; optical MM-wave transmission; penalty-free transmission; photomixing; servo loop scheme; sideband injection locking; single-mode fiber; wavelength-tunable laser modes; Diode lasers; Laser modes; Optical interferometry; Optical mixing; Optical modulation; Optical polarization; Optical sensors; Optical transmitters; Signal generators; Stimulated emission;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
