JPH02158183A - Optical gyro - Google Patents
Optical gyroInfo
- Publication number
- JPH02158183A JPH02158183A JP31210388A JP31210388A JPH02158183A JP H02158183 A JPH02158183 A JP H02158183A JP 31210388 A JP31210388 A JP 31210388A JP 31210388 A JP31210388 A JP 31210388A JP H02158183 A JPH02158183 A JP H02158183A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- light
- ring resonator
- resonator
- demultiplexer
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/083—Ring lasers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Gyroscopes (AREA)
- Lasers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕 上
述したような従来の能動型光ジャイロは、本発明は、光
ノヤイロの構成法に関し、特に、 熔融石英ブロック
を高精度に削り出し、鋺面精度の嵩いミラーを用いて安
定なリング型Ｈｅ−Ｎｅレーザを構成しなければならな
いので、製作が非常に困難であるという問題点があった
。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method of constructing a conventional active optical gyro as described above. Since a stable ring-shaped He-Ne laser must be constructed using a bulky mirror with high surface precision, there is a problem in that it is extremely difficult to manufacture.
しかも、零７αバイアスを防ぐために、レーザ発振した
両回り光が常に共振器の同一空間上を伝搬するようにレ
ーザ共振器を構成するミラーを制御する必要があった。Furthermore, in order to prevent the zero 7α bias, it was necessary to control the mirrors constituting the laser resonator so that the laser oscillated light in both directions always propagated in the same space of the resonator.
そのため、従来の能動型光ジャイロは極めて複雑な構造
となっていた。Therefore, conventional active optical gyros have extremely complicated structures.
本発明は、上記従来の能動型光ジャイロが有する製作お
よび構造上の問題点を取り除き、小型で量産化が可能な
光ジャイロを提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide an optical gyro that is small and can be mass-produced by eliminating the manufacturing and structural problems of the conventional active optical gyro.
本発明によれば、上述の目的は、前記特許請求の範囲に
記載した手段により達成される。According to the invention, the above-mentioned object is achieved by the means specified in the claims.
すなわち、本発明は、サグナック効果を内層した光ジャ
イロにおいて、光導波路と波長選択性をもつ光合分波器
で構成された光リング共振器中の少なくとも一部に、希
土類元素をドープし、これを光リング共振器外に設けた
ポンピング光源により励起することによって、該共振器
中を左右両回りに伝搬するレーザ光を発振させ、該レー
ザ光の一部を上記共振器に設けた波長選択性をもつ光合
分波器より取り出しで、互いに合渡し、系の回転入力に
比例したビート信号を得る光ジャイロである。That is, the present invention provides an optical gyro with an inner layer of the Sagnac effect, in which at least a portion of an optical ring resonator composed of an optical waveguide and an optical multiplexer/demultiplexer with wavelength selectivity is doped with a rare earth element. By exciting a pumping light source provided outside the optical ring resonator, a laser beam that propagates both left and right in the resonator is oscillated, and a part of the laser beam is provided in the resonator with wavelength selectivity. It is an optical gyro that is taken out from an optical multiplexer/demultiplexer and multiplexed with each other to obtain a beat signal proportional to the rotational input of the system.
前述したように従来の能動型光ジャイロは、熔融石英ブ
ロックを高精度に削り出し、安定なリング型Ｈｅ−Ｎｅ
レーザを構成しなければならず、製作上および構造上で
の難点があった。As mentioned above, the conventional active optical gyro is made by cutting a fused silica block with high precision and using a stable ring-shaped He-Ne gyro.
The laser had to be configured, and there were manufacturing and structural difficulties.
これに対し、本発明の光ジャイロは、光導波路と波長選
択性をもつ光合分波器で構成された光リング共振器中の
一部あるいは全部に、例えば、 Ｅｒ’１等の希土類元
素をドープし、これを光リング共振器外に設けたポンピ
ング光源により励起し、光りング共振器中を左右両回り
に伝搬するレーザ光を発振させ、それらの一部を光リン
グ共振器に設けた波長選択性をもつ光合分波器より取り
出し、互いに合渡し、系の回転に比例したビート信号を
得るものであるため、複雑な精密機械工作を必要とする
ことなく、容易に光ジャイロを製作することができる。In contrast, in the optical gyro of the present invention, a rare earth element such as Er'1 is doped into part or all of the optical ring resonator, which is composed of an optical waveguide and an optical multiplexer/demultiplexer with wavelength selectivity. This is excited by a pumping light source installed outside the optical ring resonator to oscillate a laser beam that propagates in both left and right directions inside the optical ring resonator. The optical gyro is extracted from optical multiplexers and demultiplexers with different characteristics and combined together to obtain a beat signal proportional to the rotation of the system, so it is easy to manufacture an optical gyro without the need for complex precision machining. can.
＃１図は、本発明の一実施例を示す図であって、１，２
は波長５３０ ８０７ 、あるいは１４８０ｎｍの
励振用光源、３，４は波長選択性を有する光合分波器、
５は３ ｄＢ光合分波器、６は光検出器、７はＥｒ”イ
オンをドープした光導波路である。Figure #1 is a diagram showing an embodiment of the present invention, and 1 and 2
is an excitation light source with a wavelength of 530 807 or 1480 nm, 3 and 4 are optical multiplexers/demultiplexers with wavelength selectivity,
5 is a 3 dB optical multiplexer/demultiplexer, 6 is a photodetector, and 7 is an optical waveguide doped with Er'' ions.
励振光源１，２を出た光は、光合分波器３により光導波
路７に完全に結合される。１．５μ−帯で光導波路７と
、光合分波器３．４で光リング共振器が構成されるよう
に、光合分波器３゜４の結合効率を調整する。光導波路
中にドープされ／！Ｅｒ３＋イオンは、励起光によりポ
ンピングされ、１．５〃−帯で発振する。The light emitted from the excitation light sources 1 and 2 is completely coupled to the optical waveguide 7 by the optical multiplexer/demultiplexer 3. The coupling efficiency of the optical multiplexer/demultiplexer 3.4 is adjusted so that the optical waveguide 7 and the optical multiplexer/demultiplexer 3.4 form an optical ring resonator in the 1.5 μ-band. Doped into the optical waveguide/! Er3+ ions are pumped by excitation light and oscillate in the 1.5-band.
発振した光は、光リング共振器を左右両回りに伝搬し、
その一部を光合分波器４より取り出し、３ ｄＢ光合
分波器により上記両回り光を合波する。系が回転するこ
とにより生じた左右両回り光間の発振周波数差は、光検
出器６でビート信号として検出される。The oscillated light propagates through the optical ring resonator in both left and right directions,
A part of the light is extracted from the optical multiplexer/demultiplexer 4, and the two-way light is multiplexed by the 3 dB optical multiplexer/demultiplexer. The oscillation frequency difference between the left and right lights caused by the rotation of the system is detected by the photodetector 6 as a beat signal.
第２図は、本発明の他の実施例を示す図であって、８．
９は波！に５３０，８０７．あるいは１４Ｂ０ｎｍの励
振用光源、１０ｊ１１，１２は波長選択性を有する光合
分波器、１３は３ｃｌＢ光合分波器、１４はＥｒ”イオ
ンをドープした光導波路、１５は光検出器である。FIG. 2 is a diagram showing another embodiment of the present invention, 8.
9 is a wave! 530,807. Alternatively, 14B0 nm excitation light source, 10j11 and 12 are optical multiplexers/demultiplexers having wavelength selectivity, 13 is a 3clB optical multiplexer/demultiplexer, 14 is an optical waveguide doped with Er'' ions, and 15 is a photodetector.
励振光源８，９を出た光は、光合分波器１０゜１１を通
過し、光合分波器１２により光導波路１４に完全に結合
される。 １．５μ鍮帯で先導波路１４と、光合分波器
１２で光リング共振器が構成されるように、光合分波器
１２の結合効率を調整する。The light emitted from the excitation light sources 8 and 9 passes through the optical multiplexer/demultiplexer 10.degree. 11, and is completely coupled to the optical waveguide 14 by the optical multiplexer/demultiplexer 12. The coupling efficiency of the optical multiplexer/demultiplexer 12 is adjusted so that an optical ring resonator is formed by the leading waveguide 14 and the optical multiplexer/demultiplexer 12 using a 1.5μ brass band.
光導波路中にドープされたＥｒ”イオンは、励起光によ
りポンピングされ、１．５ μ−帯で発振する。Er'' ions doped into the optical waveguide are pumped by excitation light and oscillate in the 1.5 μ-band.
発振した光は、光リング共振器を左右両回りに伝搬する
が、それらの一部は光合分波器１２より出射し、３
ｄＢ光合分ト器１３により合波される。Ｊ！％が回転す
ることにより生じた左右両回り光間の発振周波数差は、
光検出器１５でビート信号として検出される。The oscillated light propagates in both left and right directions in the optical ring resonator, but a part of it is emitted from the optical multiplexer/demultiplexer 12 and
The signals are multiplexed by a dB optical multiplexer/demultiplexer 13. J! The oscillation frequency difference between the left and right lights caused by the rotation of % is:
The photodetector 15 detects it as a beat signal.
以上説明したように、本発明によれば、能動型光ジャイ
ロが複雑な精密機械工作を必要とせず構成で終るため、
安価で大量に光ノヤイロを製作できる利点がある。As explained above, according to the present invention, the active optical gyro can be configured without requiring complicated precision machining.
This method has the advantage of being able to produce light beams in large quantities at low cost.
特に、本構成法をＳｉ基板上に形成された石英光導波路
に適用することにより、安定性に優れたセンシング部分
を容易に製作できる。さらに、同一基板上にポンピング
光源、受光器を光導波路とともに集積することも可能で
あり、能動型光ノヤイロの小型化、高信頼化を達成する
ことがで終る。In particular, by applying this construction method to a quartz optical waveguide formed on a Si substrate, a sensing portion with excellent stability can be easily manufactured. Furthermore, it is also possible to integrate a pumping light source and a light receiver together with an optical waveguide on the same substrate, thereby achieving miniaturization and high reliability of the active optical sensor.
第１図は本発明の一実施例を示す図、第２図は本発明の
他の実施例を示す図である。
１ ２ ・・・・・・励起用光源、 ３４・・
・・・・光合分波器、 ５ ・・・・・・ ３
ｃｌＢ光合分波器、 ６ ・・・・・・光
検出器、７ ・・・・・・光導波路、 ８ ９ ・
・・・・・１ｌＩｌ！起用光源、 ｉｏ
１１ １２ ・・・・・・光合分波器、
１３ ・・・・・・ ３ ｄＢ光合分波器、
１４ ・・・・・・光導波路、１５ ・・・・・
・光検出器FIG. 1 is a diagram showing one embodiment of the invention, and FIG. 2 is a diagram showing another embodiment of the invention. 1 2...Excitation light source, 34...
・・・・Optical multiplexer/demultiplexer, 5 ・・・・・・ 3
clB optical multiplexer/demultiplexer, 6...Photodetector, 7...Optical waveguide, 8 9.
...1lIl! Used light source, io
11 12... Optical multiplexer/demultiplexer,
13...3 dB optical multiplexer/demultiplexer,
14... Optical waveguide, 15...
・Photodetector
Claims (1)
路と波長選択性をもつ光合分波器で構成された光リング
共振器中の少なくとも一部に、希土類元素をドープし、
これを光リング共振器外に設けたポンピング光源により
励起することによって、該共振器中を左右両回りに伝搬
するレーザ光を発振させ、該レーザ光の一部を上記共振
器に設けた波長選択性をもつ光合分波器より取り出して
、互いに合波し、系の回転入力に比例したビート信号を
得ることを特徴とする光ジャイロ。In an optical gyro applying the Sagnac effect, at least a portion of an optical ring resonator composed of an optical waveguide and an optical multiplexer/demultiplexer with wavelength selectivity is doped with a rare earth element,
By exciting this with a pumping light source provided outside the optical ring resonator, a laser beam that propagates both left and right in the resonator is oscillated, and a portion of the laser beam is wavelength-selected by a wavelength selection device provided in the resonator. An optical gyro is characterized in that a beat signal is extracted from an optical multiplexer/demultiplexer with optical properties and multiplexed with each other to obtain a beat signal proportional to the rotational input of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31210388A JPH0671109B2 (en) | 1988-12-12 | 1988-12-12 | Light gyro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31210388A JPH0671109B2 (en) | 1988-12-12 | 1988-12-12 | Light gyro |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02158183A true JPH02158183A (en) | 1990-06-18 |
| JPH0671109B2 JPH0671109B2 (en) | 1994-09-07 |
Family
ID=18025275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31210388A Expired - Fee Related JPH0671109B2 (en) | 1988-12-12 | 1988-12-12 | Light gyro |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0671109B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04132284A (en) * | 1990-09-21 | 1992-05-06 | Santetsuku Kk | Waveguide type ring laser and waveguide type ring laser gyro |
| JP2007212247A (en) * | 2006-02-08 | 2007-08-23 | Tamagawa Seiki Co Ltd | Fiber optic ring laser gyro |
| WO2010024263A1 (en) * | 2008-09-01 | 2010-03-04 | セントラル硝子株式会社 | Interference type optical fiber gyro |
-
1988
- 1988-12-12 JP JP31210388A patent/JPH0671109B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04132284A (en) * | 1990-09-21 | 1992-05-06 | Santetsuku Kk | Waveguide type ring laser and waveguide type ring laser gyro |
| JP2007212247A (en) * | 2006-02-08 | 2007-08-23 | Tamagawa Seiki Co Ltd | Fiber optic ring laser gyro |
| WO2010024263A1 (en) * | 2008-09-01 | 2010-03-04 | セントラル硝子株式会社 | Interference type optical fiber gyro |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0671109B2 (en) | 1994-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |