Abstract

ABSTRACT We report the results of a novel method for frequency—tracking and locking of diode Laser using thetransmission spectrum of a Faraday anomalous dispersion optical filter (FADOF) as our frequency discrimi- nater. A frequency stability of better than 2. 1 X 1 0'° for 1 OOmsEt1 Os was obtained , and continuousfrequency scans of more than 2GHz was made by changing the intensity of the magnetic field of the FAD— OF from 70G to 220G. 1. INTRODUCTION Recently diode Laser (DL) have extensively been developed , because of the small size , low electricpower to operate ,and easy operation on a single mode. They are now used in various fields and consideredto have a high potentiality in wide variety of future applications.In recent years , much work has been done on the near—infrared spectroscopy of atoms and moleculeswith diode Laser. Some of these works have used the techniques developed with optical frequency standardsto frequency—lock a diode laser to an atomic or molecular transition.The frequency—stabilization of a diode Laser has been done so far mainly by using a Fabry—Perot in-

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