Title :
Miniature Nd:YAG lasers: noise and modulation characteristics
Author :
Kazovsky, Leonid G.
Author_Institution :
Bellcore, Red Bank, NJ
fDate :
3/1/1990 12:00:00 AM
Abstract :
The frequency and intensity noise spectra, as well as the frequency modulation (FM) response, of 1320-nm laser-diode-pumped miniature Nd:YAG ring lasers have been measured. The frequency noise spectrum has a resonance peak at the relaxation oscillation frequency of the laser (between 123 and 150 kHz) and is flat beyond 200 kHz with a spectral density of 613 rad2-Hz, much smaller than that of semiconductor lasers; the corresponding laser linewidth is less than 49 Hz. The relative intensity noise is -140 dB/Hz at the valley and has a resonance peak at the relaxation oscillation frequency of the laser. The FM response is flat from DC to 110 kHz and is in the 0.65-3 MHz/V range; the modulation frequency is limited by the relaxation oscillation frequency of the laser
Keywords :
frequency modulation; neodymium; optical modulation; optical pumping; random noise; ring lasers; solid lasers; 123 to 150 kHz; 1320 nm; FM response; YAG:Nd; YAl5O12:Nd; flat FM response; frequency modulation; frequency noise spectrum; frequency spectra; intensity noise spectra; laser linewidth; laser relaxation oscillation frequency; laser-diode-pumped; miniature lasers; modulation characteristics; modulation frequency; noise characteristics; relative intensity noise; relaxation oscillation frequency; resonance peak; ring lasers; semiconductor lasers; spectral density; Fiber lasers; Frequency modulation; Laser noise; Neodymium; Phase locked loops; Phase shift keying; Pump lasers; Ring lasers; Semiconductor device noise; Semiconductor lasers;
Journal_Title :
Lightwave Technology, Journal of
