| 摘要 |
In a laser in which two longitudinal modes of a laser emission are excited, high frequency stability and intensity stability of the laser emission are achieved in that the dimensioning of the laser is used to produce a coupling of the intensities of the two modes and thus at least one minimum of the gain curve over frequency appears. This curve is swept by modifying the optical length of the resonator and an extreme value of the curve is thereby stored. Proceeding from this extreme value, an intensity value is identified which deviates from the extreme value by a prescribed amount and this intensity value is kept within prescribed limits by adjusting the optical resonator length. This invention is particularly suitable for gas lasers and in particular helium neon-lasers.
|
