JPS61294884A - Optical resonator for rubidium atom oscillator - Google Patents

Abstract

PURPOSE:To improve thermal efficiency, by forming a unitary body of a rubidium lamp, a lamp heater and a lamp exciting coil in a lamp housing having a structure, whose outer surface has threaded grooves. CONSTITUTION:A rubidium lamp 12 is fixed in a lamp exciting coil bobbin comprising an insulating material such as ceramics. The bobbin 121 is fixed in a lamp housing 122, in which lamp heating transistor 15 is embedded. Thread grooves 123 are formed on the outer surface of the lamp housing 122. An exciting coil 124 is connected to a lamp exciter 11. Meanwhile, thread groves 142, which are screwed into the thread grooves 123, are formed on a housing 141 in a lamp fixing part 14 of the main body of an optical resonator 10. The lamp housing 122 is attached to the lamp fixing part 14 by screwing. Thus the lamp can be efficiently heated, and the compact size can be implemented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical resonance device for a gas cell type rubidium atomic oscillator using optical pumping.

c1 Bottom margin [Prior technology] Conventionally, in the lamp housing part of an optical resonator for a rubidium atomic oscillator, a heater for heating the lamp is installed on the outer periphery of the lamp housing, and the housing is large and is attached using a screw fastening method. are doing.

[Problem that the invention seeks to solve]

The above-mentioned conventional lamp housing for an optical resonance device is completely fixed, making it difficult to remove the lamp.Even if only the lamp could be removed, the heating heater is installed around the outer periphery of the housing, resulting in poor thermal efficiency. This has the disadvantage that the housing as a whole becomes larger.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide an improved optical resonance device for a rubidium atomic oscillator.

[Means for solving problems]

In order to achieve the above object, the optical resonance apparatus according to the present invention comprises:
Rubidium lamps, lamp heaters (usually transistors are used), and lamp excitation coils.
The rubidium lamp is integrated into a lamp housing whose outer periphery has a thread groove structure, and the rubidium lamp is efficiently heated directly by a heating transistor.

In addition, the lamp housing can be attached to the optical resonance device main body by using a thread groove structure on the optical resonance device main body side.
The lamp can be easily replaced by attaching the Lanzino 1 housing with screws.

〔Example〕

Two embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows the configuration of a gas cell type rubidium atomic oscillator, and although this configuration is the same as the conventional one, it will be briefly explained.

This device consists of an optical resonance device 10 and a control section 20. In the optical resonator 10, light from a rubidium lamp 12 turned on by a lamp exciter 11 excites rubidium atoms in a gas cell 13. 14 is a lamp fixing part, 1
5 is a heating transistor, and 16 is a temperature controller.

In the control unit 20, the output frequency of the crystal oscillator 21 is added to a frequency synthesizer 221 and a frequency multiplier 23, and the cavity resonator in the gas cell 13 is excited with the microwave obtained by combining and mixing.

When this microwave frequency matches the frequency unique to rubidium atoms, a microwave transition occurs in the rubidium atoms and the light transmitted through the gas cell decreases.

By detecting this with a photodetector, the light absorption characteristics can be obtained from the resonance signal extraction line 17. When the microwave frequency shifts positively or negatively with respect to the unique frequency of the rubidium atom, the phase of the photodetector output shifts by 180 degrees, so by amplifying this signal with the servo amplifier 24 and feeding it back to the crystal oscillator 21, The crystal oscillator 21 is controlled by the microwave transition frequency of rubidium atoms.

In this way, a very stable output frequency of the crystal oscillator 21 is obtained. 25 is a low frequency oscillator.

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

The rubidium lamp 12 is fixed within a lamp excitation coil bobbin 121 made of an insulating material such as mulberry wood. This bobbin 121 is fixed within a lamp housing 122 in which a lamp heating transistor 15 is embedded.

The lamp housing 122 has a threaded groove 123 formed on its outer periphery. 124 is an excitation coil.

It is connected to the lamp exciter 11 shown in FIG.

On the other hand, as shown in FIG.
25 is formed. With this, the lamp housing 122 is fixed to the lamp fixing part 1.
It can be attached to 4 by inserting it in. A gas cell is housed within the box body 18 and receives light from a rubidium lamp in a lamp housing 122 attached to the lamp fixing part 14.

〔Effect of the invention〕

As explained above, according to the present invention, the rubidium lamp, the lamp excitation coil, and the lamp heating transistor are integrated into the lamp housing.Secondly, the lamp can be heated efficiently and the lamp can be downsized. It is possible.

Furthermore, since the outer periphery of the lamp housing has a threaded structure, it can be attached to and removed from the optical resonance apparatus body extremely easily.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of the inside of the lamp housing according to the present invention (2), and Fig. 2 is a perspective view of the main body of the optical resonator according to the present invention;
FIG. 3 is a block diagram of a general gas cell type rubidium atomic oscillator. 10 is an optical resonator, and 11 is a lamp exciter. 12 is a rubidium lamp, 13 is a gas cell. 14 is a lamp fixing part, 15 is a heating transistor, 16
is a temperature controller, and 121 is a coil bobbin. 122 is a lamp housing, 123 is a screw groove, 124
Figure 3

Claims (1)

[Claims] 1. In an optical resonance device for a rubidium atomic oscillator consisting of a rubidium lamp, a gas cell, etc., the rubidium lamp, a heater for heating the lamp, and a coil for excitation of the lamp are integrated into a lamp housing whose outer periphery has a thread groove structure. An optical resonance device characterized in that a lamp housing is attached to an optical resonance device main body by screwing.