PURPOSE: To enable to use a semiconductor laser as a light source and to readily generate a light in the prescribed intensity by providing a Faraday rotor before one reflecting surface, and generating counterclockwise and clockwise circularly polarization light of different frequencies by the rotor under a magnetic field.
CONSTITUTION: When a Faraday rotor is not provided, or provided but a magnetic field is not applied, the oscillating light of the semiconductor laser 21 is resonated in the state that TE wave and TM wave is retracted between the reflecting surfaces 3 and 4. When the rotor is not provided or provided but the magnetic field is not applied in this manner, these two modes have a relationship of timing inversion. Accordingly, if the magnetic field is applied to the rotor to release the retraction, when the frequency of clockwise circular polarization is given by ω+Δω, the frequency of counterclockwise circular polarization is given by ω-Δω. Thus, since the frequencies are emitted from the reflecting surface 4 as the clockwise and counterclockwise circular polarizations of ω+Δω, ω-Δω, they can be separately produced by a λ/4 plate and the polarization isolator. In other words, accordingly to this configuration, the semiconductor laser can be used as a light source equivalently to the gas laser.
NAKAJIMA HIROKI
FURUKAWA YASUO
INAGAKI YUUSHI
| JPS5498195A | 1979-08-02 | |||
| JPS5285497A | 1977-07-15 | |||
| JPS53108799A | 1978-09-21 |