JPS6316050B2 - - Google Patents
Info
- Publication number
- JPS6316050B2 JPS6316050B2 JP18691980A JP18691980A JPS6316050B2 JP S6316050 B2 JPS6316050 B2 JP S6316050B2 JP 18691980 A JP18691980 A JP 18691980A JP 18691980 A JP18691980 A JP 18691980A JP S6316050 B2 JPS6316050 B2 JP S6316050B2
- Authority
- JP
- Japan
- Prior art keywords
- atomic
- amplifier
- frequency
- resonance
- oscillator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/26—Automatic control of frequency or phase; Synchronisation using energy levels of molecules, atoms, or subatomic particles as a frequency reference
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
【発明の詳細な説明】 本発明は原子発振器の改良に関する。[Detailed description of the invention] The present invention relates to improvements in atomic oscillators.
従来、原子や分子の持つ共振周波数を基準とし
て水晶発振器を制御する原子発振器は、長期周波
数安定度が極めて高いため高精度周波数発生源と
して利用されている。 Conventionally, atomic oscillators, which control crystal oscillators based on the resonance frequencies of atoms and molecules, have been used as high-precision frequency generation sources because of their extremely high long-term frequency stability.
第１図に従来の原子発振器の１例としてガスセ
ル型原子発振器の構成図を示す。図において１は
原子共振器、２は電気回路部分であつて、原子共
振器１にはランプセル３、フイルタセル４、共鳴
セル５、マイクロ波共振器６および光検出器７等
が具備されている。この原子発振器の動作は電気
回路部分２の電圧制御水晶発振器８の出力を低周
波発振器９により変調し、さらに逓倍器１０、合
成器１１、混合器１２によりその周波数を原子共
振周波数に合致するように逓倍合成し、マイクロ
波共振器６を駆動する。一方、共鳴セル５はラン
プセル３により光ポンピングされているが、光検
出器７による信号の強さは第２図に示す如く原子
共振周波数のところで最小値となる曲線１３を画
く。この原子共振セル５に周波数Lで変調された
マイクロ波が加えられると、その周波数が１４の
様に原子共振周波数よりわずかに低い場合には曲
線１５の如く周波数FLの信号が出力される。ま
たマイクロ波が１４′の様に原子共振周波数より
わずかに高いときは周波数FLで且つ信号１５と
位相が180゜異なる信号１６が出力される。またマ
イクロ波が１４″の様に原子共振周波数と一致し
たときは曲線１７の如く変調周波数FLの２倍の
2FLの信号が出力される。これらの共鳴信号１
５，１６，１７は第１図の共鳴信号増幅器１８で
増幅され、さらに周波数FLの信号１５，１６は
選択増幅器１９で増幅される。次いで低周波発振
器９に接続した位相検波器２０はこの信号の位相
を検出して電圧制御水晶発振器８の周波数を原子
共振周波数に一致するように制御する。また周波
数2Lの信号は選択増幅器２１で増幅され共鳴検
出器２２で共鳴が監視されるようになつている。
ところがこれらの共鳴信号L，2Lは原子共振器
を構成する部品の特性変化により経時的に変化す
ることがある。そのため共鳴信号レベルがある値
以下に低下した場合には原子発振器の周波数制御
ループが正常に動作しなくなり同期外れを起すこ
とがある。本発明はこの欠点を改良するために案
出されたものである。このため、本発明において
は光検出器７で検出される光の直流分を増幅し、
この直流信号で増幅器１８の利得を自動制御す
る。 FIG. 1 shows a configuration diagram of a gas cell type atomic oscillator as an example of a conventional atomic oscillator. In the figure, 1 is an atomic resonator, 2 is an electric circuit section, and the atomic resonator 1 is equipped with a lamp cell 3, a filter cell 4, a resonance cell 5, a microwave resonator 6, a photodetector 7, and the like. The operation of this atomic oscillator is to modulate the output of the voltage-controlled crystal oscillator 8 in the electric circuit section 2 using a low frequency oscillator 9, and further adjust its frequency to match the atomic resonance frequency using a multiplier 10, a synthesizer 11, and a mixer 12. The signals are multiplied and combined to drive the microwave resonator 6. On the other hand, the resonant cell 5 is optically pumped by the lamp cell 3, and the intensity of the signal from the photodetector 7 draws a curve 13 having a minimum value at the atomic resonance frequency, as shown in FIG. When a microwave modulated at a frequency L is applied to the atomic resonance cell 5, a signal with a frequency F L as shown by a curve 15 is output when the frequency is slightly lower than the atomic resonance frequency as shown in 14. Further, when the microwave is slightly higher than the atomic resonance frequency as shown in 14', a signal 16 having a frequency F L and a phase different from the signal 15 by 180° is output. Also, when the microwave matches the atomic resonance frequency like 14'', the frequency is twice the modulation frequency F L as shown in curve 17.
2F L signal is output. These resonance signals 1
5, 16, and 17 are amplified by the resonant signal amplifier 18 shown in FIG . Next, a phase detector 20 connected to the low frequency oscillator 9 detects the phase of this signal and controls the frequency of the voltage controlled crystal oscillator 8 to match the atomic resonance frequency. Further, a signal with a frequency of 2 L is amplified by a selection amplifier 21, and resonance is monitored by a resonance detector 22.
However, these resonance signals L and 2 L may change over time due to changes in the characteristics of the components that make up the atomic resonator. Therefore, when the resonance signal level drops below a certain value, the frequency control loop of the atomic oscillator may no longer operate normally, resulting in loss of synchronization. The present invention has been devised to improve this drawback. Therefore, in the present invention, the DC component of the light detected by the photodetector 7 is amplified,
The gain of the amplifier 18 is automatically controlled using this DC signal.
以下添付図面により本発明の実施例につき詳細
に説明する。第３図に本発明の実施例のブロツク
図を示す。なお図の各符号の示す意味は第１図と
同様である。 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 3 shows a block diagram of an embodiment of the present invention. Note that the meanings of each symbol in the figure are the same as in FIG. 1.
本実施例は第１図に示した原子発振器に、更に
図の如く原子共振器１より得られる共鳴信号をコ
ンデンサ２５を介して、増幅器１８に入力し、そ
の増幅器１８の出力信号レベルを安定かする為
に、原子共振器からの出力信号の直流成分を一定
の倍率で増幅する直流増幅２３と、その直流増幅
器２３の出力に対応して、増幅器１８の利得を制
御する信号を出力する基準回路２４を備えたもの
である。即ち自動利得制御を行なう回路を追加し
たものである。このように構成された原子発振器
においては、光強度が低下してもそのために起こ
る共鳴信号低下を補償することができるため、電
圧制御水晶発振器８を正しく制御することが可能
となる。なお、自動利得制御用の回路としては公
知の回路を用いることができる。 In this embodiment, the resonance signal obtained from the atomic resonator 1 is inputted to the atomic oscillator shown in FIG. In order to do this, there is a DC amplifier 23 that amplifies the DC component of the output signal from the atomic resonator at a constant magnification, and a reference circuit that outputs a signal that controls the gain of the amplifier 18 in response to the output of the DC amplifier 23. 24. That is, a circuit for performing automatic gain control is added. In the atomic oscillator configured in this manner, even if the light intensity decreases, it is possible to compensate for the resulting decrease in the resonance signal, so that the voltage-controlled crystal oscillator 8 can be correctly controlled. Note that a known circuit can be used as the automatic gain control circuit.
以上説明した如く本発明の原子発振器は、共鳴
信号レベルが経時的にあるいは周囲温度等の環境
条件により変化した場合でも原子発振器の周波数
制御ループを正常に動作せしめ、同期外れを防止
し、正常動作を維持でき、その利点は大きい。 As explained above, the atomic oscillator of the present invention allows the frequency control loop of the atomic oscillator to operate normally even when the resonance signal level changes over time or due to environmental conditions such as ambient temperature, prevents loss of synchronization, and allows normal operation. can be maintained, and the benefits are great.
第１図は従来の原子発振器の構成図、第２図は
その原子共振器より得られる共鳴信号の説明図、
第３図は本発明にかかる原子発振器の構成図であ
る。
１……原子共振器、２……電気回路部分、７…
…光検出器、１８……共鳴信号増幅器、２３……
直流増幅器。
Figure 1 is a configuration diagram of a conventional atomic oscillator, Figure 2 is an explanatory diagram of a resonance signal obtained from the atomic resonator,
FIG. 3 is a block diagram of an atomic oscillator according to the present invention. 1... Atomic resonator, 2... Electric circuit part, 7...
...Photodetector, 18... Resonance signal amplifier, 23...
DC amplifier.
Claims (1)
において、 原子共振器内の光検出器から得られる共鳴信号
を増幅する増幅器に、 該光検出器より得られる共鳴信号の直流成分の
増幅を行う直流増幅器と、 該直流増幅器の出力を検出し、該増幅器出力の
レベルが一定の値に成るように、該増幅器の利得
を変化させる基準回路を備えたことを特徴とする
ガスセル型原子発振器。[Claims] 1. In the frequency control loop within the gas cell type atomic oscillator, an amplifier for amplifying the resonance signal obtained from the photodetector in the atomic resonator is provided with a DC component of the resonance signal obtained from the photodetector. A gas cell type atom comprising: a DC amplifier that performs amplification; and a reference circuit that detects the output of the DC amplifier and changes the gain of the amplifier so that the level of the amplifier output becomes a constant value. oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18691980A JPS57111129A (en) | 1980-12-26 | 1980-12-26 | Gas cell type atomic oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18691980A JPS57111129A (en) | 1980-12-26 | 1980-12-26 | Gas cell type atomic oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57111129A JPS57111129A (en) | 1982-07-10 |
| JPS6316050B2 true JPS6316050B2 (en) | 1988-04-07 |
Family
ID=16196986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18691980A Granted JPS57111129A (en) | 1980-12-26 | 1980-12-26 | Gas cell type atomic oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57111129A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02145824U (en) * | 1989-05-15 | 1990-12-11 |
-
1980
- 1980-12-26 JP JP18691980A patent/JPS57111129A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57111129A (en) | 1982-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20050062552A1 (en) | Light stabilization for an optically excitable atomic medium | |
| US6300841B1 (en) | Atomic oscillator utilizing a high frequency converting circuit and an active, low-integral-number multiplier | |
| US4117422A (en) | Circuit for compensating vco nonlinearities in frequency modulated phase-locked loops and method thereof | |
| JPS5915123Y2 (en) | Phase lock loop FM detection device | |
| JPS6316050B2 (en) | ||
| Buckmaster et al. | The application of phase-lock microwave frequency stabilizers to electron paramagnetic resonance spectrometers | |
| US4316153A (en) | Passive masers having oscillator and cavity control loops | |
| GB2250394A (en) | Optical frequency synthesis | |
| JPS622488B2 (en) | ||
| JP3500582B2 (en) | Optical frequency reference light source generator | |
| US4634999A (en) | RF oscillator frequency stabilizing circuit using self-mixing with reference frequency | |
| JPH0748661B2 (en) | Gas cell type atomic oscillator | |
| JPS622489B2 (en) | ||
| JP2770342B2 (en) | Automatic phase control circuit | |
| IL34235A (en) | Automatic frequency control system | |
| JPH07114364B2 (en) | Atomic oscillator | |
| JPH0440104A (en) | Phase locked loop circuit of ultra high frequency diode oscillator | |
| SU584262A1 (en) | Frequency converter with automatic phase tuning | |
| SU1640812A2 (en) | Multifrequency crystal controlled generator | |
| JPS58114632A (en) | Atomic oscillator | |
| JP2864814B2 (en) | Semiconductor laser device | |
| JPH01106507A (en) | Frequency modulation circuit | |
| SU1171985A1 (en) | Automatic gain control device | |
| SU936439A1 (en) | Microwave receiver | |
| SU1720159A1 (en) | Frequency standard |