Title :
Dual-polarization frequency-modulated laser source
Author :
Baxter, Greg W. ; Dawes, J.M. ; Dekker, P. ; Knowles, D.S.
Author_Institution :
Sch. of Math., Phys., Comput. & Electron., Macquarie Univ., Sydney, NSW, Australia
Abstract :
Diode-pumped 1.3-μm as well as 1.06-μm Nd:YAG lasers have been operated with two orthogonally polarized modes at slightly different frequencies. The frequency difference, controlled by an intracavity electrooptic crystal, may be modulated. Thus, two polarized-outputs are obtained; one at a constant frequency, and the other frequency-modulated. This is a novel source for frequency-modulated heterodyne detection systems where the reference (local oscillator) frequency originates from the signal laser itself and is automatically locked to it.
Keywords :
demodulation; electro-optical modulation; frequency modulation; infrared sources; laser cavity resonators; laser modes; light polarisation; neodymium; optical pumping; solid lasers; /spl mu/m Nd:YAG lasers; 1.06 mum; 1.3 mum; YAG:Nd; YAl5O12:Nd; automatically locked; constant frequency; different frequencies; diode-pumped; dual-polarization frequency-modulated laser source; electro optical modulation; frequency difference; frequency-modulated; frequency-modulated heterodyne detection systems; intracavity electrooptic crystal; local oscillator; orthogonally polarized modes; polarized-outputs; signal laser; Birefringence; Frequency modulation; Laser mode locking; Laser modes; Laser theory; Laser tuning; Lasers and electrooptics; Local oscillators; Microchip lasers; Polarization;
Journal_Title :
Photonics Technology Letters, IEEE
