JPH05110434A - Rubidium atom oscillator - Google Patents
Rubidium atom oscillatorInfo
- Publication number
- JPH05110434A JPH05110434A JP3296403A JP29640391A JPH05110434A JP H05110434 A JPH05110434 A JP H05110434A JP 3296403 A JP3296403 A JP 3296403A JP 29640391 A JP29640391 A JP 29640391A JP H05110434 A JPH05110434 A JP H05110434A
- Authority
- JP
- Japan
- Prior art keywords
- output
- frequency
- oscillator
- voltage
- crystal 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.)
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Abstract
Description
【０００１】[0001]
【技術分野】本発明はルビジウム原子発振器に関し、特
に光ポンピング法を用いたルビジウム発振器に関する。TECHNICAL FIELD The present invention relates to a rubidium atomic oscillator, and more particularly to a rubidium oscillator using an optical pumping method.
【０００２】[0002]
【従来技術】従来のこの種の原子発振器は図３に示す様
な構成となっている。電圧制御水晶発振器１は所定周波
数の発振出力を生成するものであり、この発振出力から
周波数シンセサイザ６は所定周波数の信号を生成する。2. Description of the Related Art A conventional atomic oscillator of this type has a structure as shown in FIG. The voltage controlled crystal oscillator 1 generates an oscillation output having a predetermined frequency, and the frequency synthesizer 6 generates a signal having a predetermined frequency from the oscillation output.
【０００３】混合器８はこのシンセサイザ出力と発振器
１の発振出力とを混合して、この混合出力を高次逓倍す
る逓倍用ダイオード１２（逓倍器）へ出力する。このと
き、当該ダイオードを動作させるためにインピーダンス
調整が必要なために、整合器１３が設けられており、こ
の整合器１３を介して混合器８の出力が逓倍用ダイオー
ド１２へ印加されるようになっている。The mixer 8 mixes the synthesizer output with the oscillation output of the oscillator 1 and outputs the mixed output to a multiplying diode 12 (multiplier) for performing high-order multiplication. At this time, since the impedance adjustment is required to operate the diode, the matching device 13 is provided, and the output of the mixer 8 is applied to the multiplication diode 12 via the matching device 13. Is becoming
【０００４】このダイオード１２により高次逓倍された
信号はマイクロ波共鳴器３へ印加される。このマイクロ
波共鳴器３はルビジウムランプ及びルビジウム吸収セル
を有している。The signal that has been multiplied by the diode 12 is applied to the microwave resonator 3. The microwave resonator 3 has a rubidium lamp and a rubidium absorption cell.
【０００５】このマイクロ波共鳴器３の出力信号により
先の電圧制御水晶発振器１を制御するため周波数制御器
２が設けられており、電圧制御水晶発振器１の出力がル
ビジウム原子発振器の出力となる。A frequency controller 2 is provided for controlling the above voltage controlled crystal oscillator 1 by the output signal of the microwave resonator 3, and the output of the voltage controlled crystal oscillator 1 becomes the output of the rubidium atomic oscillator.
【０００６】いま、ここで電圧制御水晶発振器１の周波
数を６０MHz とすると、シンセサイザ６により略5 ．31
25MHz を発生させて、このシンセサイザ出力と６０MHz
とを混合器８にて混合し、この混合出力で逓倍用ダイオ
ード１２を動作させることになる。このとき、光マイク
ロ波共鳴器３に必要な6834．6875MHz を高次逓倍用ダイ
オード１２で作り出すことが必要となる。Now, assuming that the frequency of the voltage-controlled crystal oscillator 1 is 60 MHz, the synthesizer 6 produces a frequency of about 5. 31
Generates 25MHz and outputs 60MHz with this synthesizer output.
And are mixed by the mixer 8, and the multiplication diode 12 is operated by this mixed output. At this time, it is necessary to generate 6834.6875 MHz required for the optical microwave resonator 3 by the high-order multiplication diode 12.
【０００７】そのために、逓倍用ダイオードの逓倍次数
が大となり、よって電圧制御水晶発振器１の出力信号を
大きく増幅して逓倍用ダイオードに供給する必要があっ
て、効率が悪く、消費電力が多くなるという欠点があ
る。For this reason, the multiplication order of the multiplication diode becomes large, so that it is necessary to greatly amplify the output signal of the voltage controlled crystal oscillator 1 and supply it to the multiplication diode, resulting in poor efficiency and high power consumption. There is a drawback.
【０００８】また、逓倍用ダイオードを動作させるため
に、バイアス調整やインピーダンス整合等の調整に時間
を要するという欠点もある。Further, there is also a drawback that it takes time to adjust bias and impedance matching in order to operate the multiplication diode.
【０００９】[0009]
【発明の目的】本発明の目的は、バイアス調整やインピ
ーダンス調整等の面倒な調整を必要とする逓倍用ダイオ
ードを不要としたルビジウム原子発振器を提供するこで
ある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a rubidium atomic oscillator which does not require a diode for multiplication which requires troublesome adjustment such as bias adjustment and impedance adjustment.
【００１０】本発明の他の目的は、逓倍用ダイオードの
バイアス調整やインピーダンス整合を簡単化することが
可能なルビジウム原子発振器を提供するこである。Another object of the present invention is to provide a rubidium atomic oscillator capable of simplifying bias adjustment and impedance matching of a diode for multiplication.
【００１１】[0011]
【発明の構成】本発明によるルビジウム原子発振器は、
電圧制御水晶発振器と、この発振出力を分周する分周器
と、この分周器出力を入力とするフェイズロックループ
回路と、前記発振出力から所定周波数信号を生成する周
波数合成器と、前記フェイズロックループ回路内の電圧
制御発振器の出力またはその分周出力と前記周波数合成
器の出力信号とを混合する混合器と、この混合出力が供
給される光マイクロ波共鳴器と、この光マイクロ波共鳴
器の出力信号により前記電圧制御水晶発振器を制御する
周波数制御器とを含み、前記電圧制御水晶発振器の出力
を発振出力としたことを特徴とする。The rubidium atomic oscillator according to the present invention comprises:
A voltage controlled crystal oscillator, a frequency divider that divides the oscillation output, a phase-locked loop circuit that receives the frequency divider output as an input, a frequency synthesizer that generates a predetermined frequency signal from the oscillation output, and the phase. A mixer for mixing the output of the voltage controlled oscillator in the lock loop circuit or its frequency-divided output with the output signal of the frequency synthesizer, an optical microwave resonator to which the mixed output is supplied, and the optical microwave resonance. A frequency controller that controls the voltage-controlled crystal oscillator according to an output signal of the voltage controller, and the output of the voltage-controlled crystal oscillator is an oscillation output.
【００１２】本発明による他のルビジウム原子発振器
は、電圧制御水晶発振器と、この発振出力を入力とし電
圧制御ＳＡＷ発振器を内部に含むフェイズロックループ
回路と、前記発振出力から所定周波数信号を生成する周
波数合成器と、前記電圧制御ＳＡＷ発振器の出力と前記
周波数合成器の出力信号とを混合する混合器と、この混
合出力を逓倍する逓倍器と、この逓倍出力が供給される
光マイクロ波共鳴器と、この光マイクロ波共鳴器の出力
信号により前記電圧制御水晶発振器を制御する周波数制
御器とを含み、前記電圧制御水晶発振器の出力を発振出
力としたことを特徴とする。Another rubidium atomic oscillator according to the present invention comprises a voltage-controlled crystal oscillator, a phase-locked loop circuit which receives the oscillation output and internally includes a voltage-controlled SAW oscillator, and a frequency for generating a predetermined frequency signal from the oscillation output. A combiner, a mixer for mixing the output of the voltage controlled SAW oscillator and the output signal of the frequency synthesizer, a multiplier for multiplying the mixed output, and an optical microwave resonator to which the multiplied output is supplied. A frequency controller that controls the voltage-controlled crystal oscillator according to the output signal of the optical microwave resonator, and the output of the voltage-controlled crystal oscillator is an oscillation output.
【００１３】[0013]
【実施例】以下、図面を参照しつつ本発明の実施例を詳
細に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１４】図１は本発明の実施例のブロック図であ
り、図３と同等部分は同一符号により示している。電圧
制御水晶発振器１の発振出力をシンセサイザ６へ入力し
て所定周波数信号を生成し、これを混合器８の１入とし
ている。FIG. 1 is a block diagram of an embodiment of the present invention, and the same portions as those in FIG. 3 are designated by the same reference numerals. The oscillation output of the voltage-controlled crystal oscillator 1 is input to the synthesizer 6 to generate a predetermined frequency signal, which is used as the input of the mixer 8.
【００１５】この混合器８の他入力にはＰＬＬ（フェイ
ズロックループ）回路におけるＶＣＯ（電圧制御発振
器）１５による発振出力が導入されるようになってい
る。このＰＬＬ回路は、ＶＣＯ１５と、このＶＣＯ出力
を分周する分周器７，９，１０，１１（この順に縦続接
続されている）と、この分周出力と電圧制御水晶発振器
１の出力の分周器４による分周出力とを位相比較する比
較器１４と、所定ループ定数を有するＬＰＦ５とからな
る。An oscillation output from a VCO (voltage controlled oscillator) 15 in a PLL (phase lock loop) circuit is introduced to the other input of the mixer 8. This PLL circuit includes a VCO 15, frequency dividers 7, 9, 10, and 11 (which are cascaded in this order) for dividing the VCO output, and a division of the divided output and the output of the voltage-controlled crystal oscillator 1. It comprises a comparator 14 for phase-comparing the frequency-divided output from the frequency divider 4, and an LPF 5 having a predetermined loop constant.
【００１６】そして、混合器８の混合出力を直接光マイ
クロ波共鳴器３へ印加する構成として、調整が煩雑で効
率が悪い高次逓倍用ダイオードを省略している。Further, in the structure in which the mixed output of the mixer 8 is directly applied to the optical microwave resonator 3, the diode for high-order multiplication, which is complicated to adjust and inefficient, is omitted.
【００１７】例えば、電圧制御水晶発振器１の発振周波
数を１０MHz とし、ＰＬＬ回路内のＶＣＯ１５のそれを
6840×ｍ（ｍは１以上の整数）MHz として、分周器４を
１／２N ，分周器７を１／ｍ，分周器９を１／２N+2 ，
分周器１０を１／９，分周器１１を１／１９に夫々設定
する。For example, the oscillation frequency of the voltage controlled crystal oscillator 1 is set to 10 MHz, and that of the VCO 15 in the PLL circuit is
6840 × m (m is an integer of 1 or more) MHz, the frequency divider 4 is 1/2 N , the frequency divider 7 is 1 / m, the frequency divider 9 is 1/2 N + 2 ,
The frequency divider 10 is set to 1/9 and the frequency divider 11 is set to 1/19.
【００１８】こうすれば、混合器８の他入力は6480MHz
となるから、シンセサイザ６を図３の従来と同様に略5
．3125MHz とすれば、混合器８による混合出力（両入
力の差の周波数）には、光マイクロ波共鳴器３に必要な
6834．6875MHz が得られる。よって、逓倍用ダイオード
は不要となるのである。In this way, the other input of the mixer 8 is 6480 MHz.
Therefore, the synthesizer 6 can be replaced with the conventional one shown in FIG.
． If the frequency is 3125 MHz, the mixed output from the mixer 8 (the frequency of the difference between the two inputs) is necessary for the optical microwave resonator 3.
6834. 6875MHz is obtained. Therefore, the diode for multiplication is unnecessary.
【００１９】また、かかる構成において、光マイクロ波
共鳴器３は与えられたマイクロ波によって誤差信号を発
生し、周波数制御器２はこの誤差信号を電圧制御水晶発
振器１の制御電圧に変換しており、これにより電圧制御
水晶発振器１の出力周波数は光マイクロ波共鳴器３の周
波数安定度と同等となり、高安定となるものである。Further, in such a configuration, the optical microwave resonator 3 generates an error signal by the applied microwave, and the frequency controller 2 converts this error signal into the control voltage of the voltage controlled crystal oscillator 1. As a result, the output frequency of the voltage controlled crystal oscillator 1 becomes equivalent to the frequency stability of the optical microwave resonator 3 and becomes highly stable.
【００２０】更に、ＶＣＯ１５を含むＰＬＬ回路を用い
ることにより、ＶＣＯ１５は電圧制御水晶発振器１の周
波数安定度と同等となる。このことは、すなわちＶＣＯ
１５の出力周波数も光マイクロ波共鳴器３の周波数安定
度と同等となり、安定なルビジウム原子発振器を構成で
きる。Further, by using the PLL circuit including the VCO 15, the VCO 15 becomes equivalent to the frequency stability of the voltage controlled crystal oscillator 1. This means that the VCO
The output frequency of 15 is also equal to the frequency stability of the optical microwave resonator 3, and a stable rubidium atomic oscillator can be constructed.
【００２１】図２は本発明の他の実施例を示すブロック
図であり、図１，３と同等部分は同一符号により示して
いる。本例は逓倍用ダイオード１２を用いているが、そ
の逓倍次数を高次とする必要がなく、よって調整を簡単
化して電力効率も向上可能としたものである。FIG. 2 is a block diagram showing another embodiment of the present invention, and the same parts as those in FIGS. 1 and 3 are designated by the same reference numerals. In this example, the diode 12 for multiplication is used, but it is not necessary to set the multiplication order to a high order, so that the adjustment can be simplified and the power efficiency can be improved.
【００２２】電圧制御水晶発振器１の出力をＰＬＬ回路
へ入力し、このＰＬＬ回路のＶＣＯ１５（本例では、10
0 MHz 〜数GHz 帯域の発振が可能なＳＡＷ（弾性表面波
発振器を用いる）の出力を混合器８の他入力としてい
る。The output of the voltage controlled crystal oscillator 1 is input to the PLL circuit, and the VCO 15 (10 in this example) of this PLL circuit is input.
The output of SAW (using a surface acoustic wave oscillator) capable of oscillating in the 0 MHz to several GHz band is used as the other input of the mixer 8.
【００２３】このＰＬＬ回路はＳＡＷ発振器１５の出力
を分周する分周器１０，１１と、この分周出力と電圧制
御水晶発振器１の出力とを位相比較する比較器１４と、
この比較出力を所定ループ定数で直流信号に変換するＬ
ＰＦ５とからなる。This PLL circuit divides the output of the SAW oscillator 15 by frequency dividers 10 and 11, and a comparator 14 that compares the phase of the frequency-divided output with the output of the voltage-controlled crystal oscillator 1.
L for converting this comparison output into a DC signal with a predetermined loop constant
It consists of PF5.
【００２４】そして、混合器８の混合出力を逓倍器１２
により逓倍して、光マイクロ波共鳴器３に必要な6834．
6875MHz を得るようになっている。Then, the mixed output of the mixer 8 is multiplied by the multiplier 12
Required by the optical microwave resonator 3 for the 6834.
It is designed to get 6875MHz.
【００２５】この様に、ＳＡＷ発振器１５を用いたＰＬ
Ｌ回路により安定な周波数を得て、混合器８にてシンセ
サイザ６の出力と混合し、これを逓倍器１２にて逓倍す
るようにしているので、逓倍用ダイオードの逓倍次数は
小さくて良くなる。よって、逓倍効率も良く、調整も容
易となるのである。Thus, the PL using the SAW oscillator 15
Since a stable frequency is obtained by the L circuit and mixed with the output of the synthesizer 6 by the mixer 8 and this is multiplied by the multiplier 12, the multiplication order of the diode for multiplication can be small. Therefore, the multiplication efficiency is good and the adjustment is easy.
【００２６】[0026]
【発明の効果】以上述べた如く、本発明によれば、逓倍
用ダイオードの逓倍次数を小とするか全く不要としたの
で、逓倍用ダイオードの煩雑な調整はなくなり、また低
消費電力化及び小型化が可能になるという効果がある。As described above, according to the present invention, since the multiplication order of the multiplication diode is made small or not necessary at all, the complicated adjustment of the multiplication diode is eliminated, and the power consumption and the size are reduced. There is an effect that it becomes possible.
【図１】本発明の一実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】本発明の他の実施例のブロック図である。FIG. 2 is a block diagram of another embodiment of the present invention.
【図３】従来のルビジウム原子発振器のブロック図であ
る。FIG. 3 is a block diagram of a conventional rubidium atomic oscillator.
１ 電圧制御水晶発振器 ２ 周波数制御器 ３ 光マイクロ波共鳴器 ６ シンセサイザ ８ 混合器 １２ 逓倍器 １５ ＶＣＯ 1 Voltage Controlled Crystal Oscillator 2 Frequency Controller 3 Optical Microwave Resonator 6 Synthesizer 8 Mixer 12 Multiplier 15 VCO
Claims (3)
分周する分周器と、この分周器出力を入力とするフェイ
ズロックループ回路と、前記発振出力から所定周波数信
号を生成する周波数合成器と、前記フェイズロックルー
プ回路内の電圧制御発振器の出力またはその分周出力と
前記周波数合成器の出力信号とを混合する混合器と、こ
の混合出力が供給される光マイクロ波共鳴器と、この光
マイクロ波共鳴器の出力信号により前記電圧制御水晶発
振器を制御する周波数制御器とを含み、前記電圧制御水
晶発振器の出力を発振出力としたことを特徴とするルビ
ジウム原子発振器。1. A voltage controlled crystal oscillator, a frequency divider that divides the oscillation output, a phase-lock loop circuit that receives the output of the frequency divider, and a frequency synthesizer that generates a predetermined frequency signal from the oscillation output. A mixer for mixing the output of the voltage controlled oscillator in the phase-locked loop circuit or its frequency-divided output and the output signal of the frequency synthesizer, and an optical microwave resonator to which the mixed output is supplied, A rubidium atomic oscillator, comprising: a frequency controller that controls the voltage-controlled crystal oscillator according to an output signal of the optical microwave resonator, wherein the output of the voltage-controlled crystal oscillator is an oscillation output.
制御発振器の発振周波数は6840×ｍMHz （ｍは１以上の
整数）であり、前記周波数合成器の出力周波数は略5 ．
3125MHz であり、前記混合器は前記電圧制御発振器の出
力である6840ｍMHz の1/m の周波数と前記周波数合成器
の出力周波数である5 ．3125MHz とを混合することを特
徴とする請求項１記載のルビジウム電子発振器。2. The oscillation frequency of the voltage controlled oscillator in the phase lock loop circuit is 6840 × mMHz (m is an integer of 1 or more), and the output frequency of the frequency synthesizer is approximately 5.
4. The frequency is 3125 MHz, and the mixer has a frequency of 1 / m of the output of the voltage controlled oscillator of 6840 MHz and the output frequency of the frequency synthesizer. The rubidium electron oscillator according to claim 1, wherein the rubidium electron oscillator is mixed with 3125 MHz.
入力とし電圧制御ＳＡＷ発振器を内部に含むフェイズロ
ックループ回路と、前記発振出力から所定周波数信号を
生成する周波数合成器と、前記電圧制御ＳＡＷ発振器の
出力と前記周波数合成器の出力信号とを混合する混合器
と、この混合出力を逓倍する逓倍器と、この逓倍出力が
供給される光マイクロ波共鳴器と、この光マイクロ波共
鳴器の出力信号により前記電圧制御水晶発振器を制御す
る周波数制御器とを含み、前記電圧制御水晶発振器の出
力を発振出力としたことを特徴とするルビジウム原子発
振器。3. A voltage-controlled crystal oscillator, a phase-locked loop circuit that receives the oscillation output as an input and internally includes a voltage-controlled SAW oscillator, a frequency synthesizer that generates a predetermined frequency signal from the oscillation output, and the voltage-controlled SAW. A mixer for mixing the output of the oscillator and the output signal of the frequency synthesizer, a multiplier for multiplying this mixed output, an optical microwave resonator to which this multiplied output is supplied, and this optical microwave resonator. A rubidium atomic oscillator, comprising: a frequency controller that controls the voltage-controlled crystal oscillator according to an output signal, wherein the output of the voltage-controlled crystal oscillator is an oscillation output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3296403A JP2788807B2 (en) | 1991-10-16 | 1991-10-16 | Rubidium atomic oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3296403A JP2788807B2 (en) | 1991-10-16 | 1991-10-16 | Rubidium atomic oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05110434A true JPH05110434A (en) | 1993-04-30 |
| JP2788807B2 JP2788807B2 (en) | 1998-08-20 |
Family
ID=17833098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3296403A Expired - Lifetime JP2788807B2 (en) | 1991-10-16 | 1991-10-16 | Rubidium atomic oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2788807B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6333942B1 (en) | 1998-12-17 | 2001-12-25 | Nippon Telegraph And Telephone Corporation | Atomic frequency standard laser pulse oscillator |
-
1991
- 1991-10-16 JP JP3296403A patent/JP2788807B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6333942B1 (en) | 1998-12-17 | 2001-12-25 | Nippon Telegraph And Telephone Corporation | Atomic frequency standard laser pulse oscillator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2788807B2 (en) | 1998-08-20 |
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