Interference filter, optical module, and electronic apparatus

摘要

An optical module for an atomic oscillator using a quantum interference effect includes a first light source unit that emits first resonance light, a gas cell in which an alkali metal atom is sealed, a first light detection unit that detects the intensity of the first resonance light having passed through the gas cell, a determination unit that determines whether or not the first light source unit has failed, a second light source unit that irradiates the gas cell with second resonance light when the determination unit determines that the first light source unit has failed, and a second light detection unit that detects the intensity of the second resonance light having passed through the gas cell, and the optical path length of the first resonance light in the gas cell and the optical path length of the second resonance light in the gas cell are equal to each other.

主权项

1. An optical module for an atomic oscillator using a quantum interference effect, the optical module comprising:
a first light source unit that emits first resonance light having two wavelengths different from each other, the first resonance ht having a first optical axis; a single gas cell in which an alkali metal atom is sealed; a first light detection unit that detects the intensity of the first resonance light having passed through the single gas cell; a determination unit that determines whether or not the first light source unit maintains a predetermined abnormal light output level; a second light source unit that irradiates the single gas cell with second resonance light having two wavelengths different from each other when the determination unit determines that the first light source unit maintains the predetermined abnormal light output level, the second resonance light having a second optical axis; and a second light detection unit that detects the intensity of the second resonance light having passed through the single gas cell, wherein the first optical axis and the second optical axis intersect each other at the single gas cell, and a first optical path length of the first resonance light in the single gas cell and a second optical path length of the second resonance light in the single gas cell are equal to each other.