| 摘要 |
<p>An optical module of an atomic oscillator includes: a surface emitting laser (10) adapted to emit polarized light; a polarization element (20) irradiated with the light emitted from the surface emitting laser, and having a polarization transmission axis disposed so as to be rotated by 45 degrees with respect to a polarization direction of the polarized light; a »/4 plate (30) irradiated with light having been transmitted through the polarization element, and having a fast axis disposed so as to be rotated by 45 degrees with respect to the polarization transmission axis; a gas cell (40) encapsulating an alkali metal gas, and irradiated with light having been transmitted through the »/4 plate; and a light detection section (50) adapted to detect intensity of light having been transmitted through the gas cell. Due to high-frequency modulation of the VCSEL side-bands are generated which are in resonance to the absorption of the alkali metal gas resulting in a very stable atomic clock by using this signal in a feedback loop controlling the VCSEL high frequency modulation.</p> |
