| 摘要 |
<p>An etalon-stabilized, external-cavity laser. An external cavity laser (801, 817) includes a servo circuit (821) that adjusts the angle of an intra-cavity etalon (815) with respect to a light beam generated by the laser to suppress multimode operation of the laser. The servo circuit employs a photodiode detector (809) to detect a beat frequency that occurs during multimode laser operation. The diode output is applied to an envelope detector (825). The envelope detector provides a signal that is applied to an integrator (827). The integrator provides a signal that controls the orientation of the etalon by means of a galvanometer (819) and thereby suppresses unwanted modes of operation of the laser. <IMAGE></p> |
