Title :
Frequency-locking of 1.5- mu m InGaAsP lasers to an atomic krypton line without dithering the laser frequency
Author :
Chung, Y.C. ; Derosier, R.M.
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
fDate :
6/1/1990 12:00:00 AM
Abstract :
The frequency-locking of a 1.5- mu m distributed-feedback (DFB) laser to an atomic Kr 2p/sub 8/-3d"/sub 1/ transition at 1.5244 mu m that does not dither the laser frequency is discussed. Instead, the frequency-discriminant signal was obtained by dithering the Kr line with a small AC magnetic field using the Zeeman effect. The frequency shift of this Kr line was measured to be 1.25 MHz/G, and is linearly proportional to the applied magnetic field. Since the technique avoids dithering of the laser frequency without adding complexity in the servo-loop, it is well suited for developing master oscillators to be used in optical wavelength-division-multiplexed (WDM) networks.<>
Keywords :
III-V semiconductors; Zeeman effect; frequency division multiplexing; gallium arsenide; gallium compounds; indium compounds; krypton; laser mode locking; semiconductor junction lasers; spectral line shift; 1.5 micron; 1.5244 micron; AC magnetic field; DFBL; InGaAsP lasers; Zeeman effect; applied magnetic field; atomic Kr 2p/sub 8/-3d"/sub 1/ transition; atomic Kr line; atomic line dithering; distributed feedback lasers; frequency shift; frequency-discriminant signal; laser frequency; laser frequency locking; master oscillators; optical WDM networks; optical wavelength-division-multiplexed; servo-loop; Atom lasers; Atomic beams; Frequency measurement; Laser transitions; Magnetic field measurement; Optical fiber networks; Oscillators; WDM networks; Wavelength division multiplexing; Wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
