Electronic device, quantum interference device, atomic oscillator, electronic apparatus, and moving object

Patent metadata

Field	Value
Publication number	US-9356426-B2
Application number	US-201414219102-A
Country	US
Kind code	B2
Filing date	Mar 19, 2014
Priority date	Mar 27, 2013
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

An atomic oscillator includes a first unit and a second unit arranged to be separated from each other and a package including an internal space in which the first unit and the second unit are housed in a state in which the internal space is decompressed to pressure lower than the atmospheric pressure. The reflectance of the outer surfaces of the first unit and the second unit to an electromagnetic wave having a wavelength of 4 μm is equal to or higher than 50%.

First claim

What is claimed is:

1. An electronic device comprising:
a first electronic component, the first electronic component includes:
a light emitter that emits first and second lights having different frequencies from each other; and
a first component package that houses the light emitter;

a second electronic component, the second electronic component includes:
a gas cell that encapsulates alkali metal atoms and that receive the first and second lights;
a light detector that detects intensity of an excitation light from the gas cell in accordance with the first and second lights and that outputs a detection result;
a heater that heats the gas cell;
an excitation-light controller that receives the detection result and that sends a control signal to the light emitter based on the detection result so as to change a frequency of the first and second lights; and
a second component package that houses the gas cell, the light detector, the heater and the excitation-light controller; and

a main package that houses the first and second component packages, the first and second component packages being spaced apart from each other with an internal space, the internal space being decompressed to pressure lower than the atmospheric pressure, wherein
reflectance of at least a part of an outer surface of at least one electronic component of the first electronic component and the second electronic component to an electromagnetic wave having a wavelength of 4 μm is equal to or higher than 50%.

2. The electronic device according to claim 1 , wherein
the first electronic component is subjected to temperature control at a first temperature by the heater, and
the second electronic component is subjected to temperature control at a second temperature higher than the first temperature by the heater.

3. The electronic device according to claim 1 , wherein an inner surface of the package includes a black or dark color portion.

4. The electronic device according to claim 1 , wherein reflectance of at least a part of an outer surface of the package to the electromagnetic wave having the wavelength of 4 μm is equal to or higher than 50%.

5. The electronic device according to claim 1 , wherein reflectance of at least a part of an outer surface of each of the first electronic component and the second electronic component to the electromagnetic wave having the wavelength of 4 μm is equal to or higher than 50%.

6. The electronic device according to claim 1 , wherein a metal film is arranged on the outer surface of at least one electronic component of the first electronic component and the second electronic component.

7. An atomic oscillator comprising the electronic device according to claim 1 .

8. An electronic apparatus comprising the electronic device according to claim 1 .

9. A moving object comprising the electronic device according to claim 1 .

Assignees

• Seiko Epson Corp

Inventors

• Chindo Koji

Classifications

• H01S5/02446

  Cooling being separate from the laser chip cooling · CPC title

• H03L7/26

  using energy levels of molecules, atoms, or subatomic particles as a frequency reference · CPC title

• H01S5/0687 Primary

  Stabilising the frequency of the laser · CPC title

• G04F5/145

  using Coherent Population Trapping · CPC title

• H03B17/00

  Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator · CPC title