CN2682384Y - Optical fiber gyroscope - Google Patents
Optical fiber gyroscope Download PDFInfo
- Publication number
- CN2682384Y CN2682384Y CN 200320112198 CN200320112198U CN2682384Y CN 2682384 Y CN2682384 Y CN 2682384Y CN 200320112198 CN200320112198 CN 200320112198 CN 200320112198 U CN200320112198 U CN 200320112198U CN 2682384 Y CN2682384 Y CN 2682384Y
- Authority
- CN
- China
- Prior art keywords
- quartz crystal
- polarizing coating
- semiconductor laser
- fibre optic
- optical signal
- 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 - Fee Related
Links
Images
Abstract
The utility model belongs to an optical fiber gyro which is characterized in that one deck of oxides dielectric film is arranged between the tangent planes of the opposite arris of the piezoid. A junction laser and a polarizing coating are respectively fixed on the middle section of the lower erect side and the middle section of the upper plane of the piezoid which is divided by the dielectric tangent plane of the oxides. The utility model is provided with a few connecting welding spots, and an optical coupler is canceled. Consequently, the attrition of the light energy is few, and the quick and accurate correction and adjustment of the attitude is realized. Critical pieces are combined compactly without distance, so when being mechanically fixed or encapsulated with glue, the optical fiber gyro has the advantages of comparatively stable complete structure, small volume, comparatively stable performance of each piece, small temperature coefficient, and high contrast ratio of the interference (which can attain 30-35dB), and high sensitivity.
Description
Affiliated field
The utility model belongs to optical field, especially a kind ofly is used for the fibre optic gyroscope that the high-speed travel attitude is adjusted correction.
Background technology
To be aerospace industry adjust the device of correction to the high-speed travel attitude of aircraft, satellite, guided missile with fibre optic gyroscope, is the important control instrument that guarantees its accurate flying course.At present known disclosed fibre optic gyroscope adopts semiconductor laser emission light beam, is made up of photo-coupler, polarizer, polarizing coating and polarization-maintaining fiber coil.Its principle is the angular velocity of calculating generation by the detection of the two-beam phase differential of polarization, revises deviation angle by computer control again, finally adjusts attitude.Shortcoming is: 1. because each parts are separate mode (distance is arranged between each parts), its contact by welding carry out point-to-point, the some line, line are connected with line, the structure more complicated, solder joint is many, parts such as photo-coupler from loss in addition, cause the luminous energy loss ratio bigger, measuring error is bigger, has influenced the accurate correction of attitude; Fibre optic gyroscope be strict with each component locations must relative fixed, such separated components is being carried out the affixed or glue of machinery when encapsulating, it is huger that overall volume seems; 3. the temperature coefficient of complete machine is poor, and accurate control is caused harmful effect; 4. interfere poor contrast (only being 15dB), cause sensitivity lower.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of simple and compact for structure, and the luminous energy loss is very little, and attitude control and correction sensitivity be fibre optic gyroscope fast.
The implementation of the purpose of this utility model is:
The utility model is by semiconductor laser, quartz crystal, polarizing coating, polarization-maintaining fiber coil constitutes, the quartz crystal that adopts is high-purity quartz crystal, this quartz crystal is positive tetragonal body structure, growth has the multilevel oxide dielectric film between this quartz crystal is to the formed tangent plane of the section between the rib, semiconductor laser and polarizing coating are packed in the middle part, following upright side of the quartz crystal that this medium of oxides film tangent plane is split to form and the middle part on last plane by glue or mechanical system, and the two ends of polarization maintaining optical fibre connect respectively by the semiconductor laser emitted light beams through the transmission of medium of oxides film with reflect the light beam of being exported.
On polarizing coating, be fixed with an optical signal receiver, draw signal terminal on this optical signal receiver, draw the power lead of semiconductor supply laser instrument and optical signal receiver electric power on the semiconductor laser.Semiconductor laser, polarizing coating all are connected on the quartz crystal by epoxy resin is gluing, optical signal receiver is connected on the polarizing coating by epoxy resin is gluing, the light beam of quartz crystal, semiconductor laser, polarizing coating and optical signal receiver, semiconductor laser all is encapsulated in the packaging plastic that is made of epoxy resin glue by two output beams and the splicing ears polarization-maintaining fiber coil two ends of quartz crystal and reflection of medium of oxides film and transmission, and the oxide that described medium of oxides film is adopted is an alkali metal oxide.
Advantage of the present utility model and good effect are:
1. because solder joint is fewer, save photo-coupler again, so the own loss of luminous energy is considerably less, has realized accurately revising fast and adjusting attitude;
2. critical piece does not almost have distance in conjunction with closely, thereby when carrying out the encapsulation of mechanical fixation or glue, one-piece construction is more stable, and volume is very little;
3. each component capabilities is more stable, and temperature coefficient is smaller;
4. interfere the contrast height (can reach 30～35dB), make highly sensitive.
Description of drawings
Fig. 1 is the general structure cut-open view of this utility model;
Fig. 2 is the three-dimensional profile synoptic diagram of Fig. 1;
Fig. 3 is an optics fundamental diagram of the present utility model.
Embodiment
By following examples, and, specifically set forth content of the present invention with reference to accompanying drawing.
Fibre optic gyroscope described in the utility model, main body are quartz crystals 8, and this quartz crystal is positive tetragonal body structure, is made by high-purity quartz crystal.Between this quartz crystal is to the tangent plane of formed upper and lower two triangular prisms of the section of rib, also finally be solidified with a multilevel oxide dielectric film 4 by the special process growth, the oxide that this medium of oxides film is adopted is an alkali metal oxide, as calcium oxide, magnesium oxide etc.Facade at the following triangular prism of this quartz crystal promptly is fixed with semiconductor laser instrument 3 in the middle part, following upright side of this quartz crystal, and this semiconductor laser can be launched a branch of monofilm infrared laser light beam to quartz crystal; Plane on the last triangular prism promptly this quartz crystal on the middle part on plane be fixed with a polarizing coating 5, be fixed with an optical signal receiver 7 on this polarizing coating, this optical signal receiver can be converted to light signal electric signal and signal terminal 6 outputs by drawing on this optical signal receiver.The power lead 1 of semiconductor supply laser instrument and optical signal receiver electric power is drawn at the middle part of semiconductor laser.All be connected the two ends of polarization-maintaining fiber coil 11 (referring to Fig. 3) through two light beams of medium of oxides film transmission and refraction by splicing ear 9,10 at this light beam, this polarization maintaining optical fibre is a panda type.
Do not adopt machinery to install mode in the present embodiment, and adopt epoxy resin glue to carry out bonding mode, be adhesive on the quartz crystal as semiconductor laser, polarizing coating, optical signal receiver is adhesive on the polarizing coating, and the light beam of quartz crystal, semiconductor laser, polarizing coating and optical signal receiver, semiconductor laser all is encapsulated in the packaging plastic 2 that is made of epoxy resin glue by two output beams and the splicing ears polarization-maintaining fiber coil two ends of quartz crystal and reflection of medium of oxides film and transmission.
Principle of work of the present utility model is:
Semiconductor laser is launched a branch of monofilm infrared laser light beam a, this Shu Guang enters quartz crystal after a branch of horizontal polarization light b is sent in the transmission of medium of oxides film, send a branch of orthogonal polarized light c after the reflection, after this two light beams is transmitted in polarization-maintaining fiber coil, the horizontal polarization light d that sends enters polarizing coating through the transmission of medium of oxides film again, the orthogonal polarized light e that sends enters polarizing coating through the reflection of medium of oxides film again, after two light beams is pooled to polarizing coating, this two light beams f, g detects its phase differential through optical signal receiver, and its light signal is converted to electric signal, give computing machine by signal terminal, the angular velocity that phase difference calculating drew is revised adjustment, align the attitude of advancing.
Claims (6)
1. fibre optic gyroscope, by semiconductor laser, quartz crystal, polarizing coating, polarization-maintaining fiber coil constitutes, it is characterized in that: described quartz crystal is positive tetragonal body structure, one deck medium of oxides film is arranged between this quartz crystal is to the rib tangent plane, semiconductor laser and polarizing coating are packed in the middle part, following upright side of the quartz crystal that quartz crystal is split to form the rib tangent plane and the middle part on last plane respectively, connect the two ends of a polarization-maintaining fiber coil on the quartz crystal face of the outgoing position of the two light beams of transmission of medium of oxides film and reflection respectively in the semiconductor laser emitted light beams.
2. fibre optic gyroscope according to claim 1 is characterized in that: described medium of oxides film is the multilayer growth structure.
3. fibre optic gyroscope according to claim 1, it is characterized in that: on polarizing coating, be fixed with optical signal receiver, this optical signal receiver is drawn signal terminal, draws the power lead of semiconductor supply laser instrument and optical signal receiver electric power on the semiconductor laser.
4. according to claim 1 or 3 described fibre optic gyroscopes, it is characterized in that: semiconductor laser, polarizing coating all are adhesive on the quartz crystal, optical signal receiver is adhesive on the polarizing coating, and the splicing ear that quartz crystal, semiconductor laser, polarizing coating and optical signal receiver, polarization-maintaining fiber coil and quartz crystal join all is encapsulated in the packaging plastic.
5. fibre optic gyroscope according to claim 4 is characterized in that: what described each parts carried out bonding employing is epoxy resin glue, and described packaging plastic is an epoxy resin glue.
6. fibre optic gyroscope according to claim 1 and 2 is characterized in that: the oxide of described medium of oxides film is an alkali metal oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320112198 CN2682384Y (en) | 2003-11-13 | 2003-11-13 | Optical fiber gyroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320112198 CN2682384Y (en) | 2003-11-13 | 2003-11-13 | Optical fiber gyroscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2682384Y true CN2682384Y (en) | 2005-03-02 |
Family
ID=34599392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320112198 Expired - Fee Related CN2682384Y (en) | 2003-11-13 | 2003-11-13 | Optical fiber gyroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2682384Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8102535B2 (en) | 2006-12-31 | 2012-01-24 | Beijing Aerospace Times Optical-Electric Technology Co., Ltd. | Fiber optic gyroscope using a low-polarization and polarization-maintaining hybrid light path |
-
2003
- 2003-11-13 CN CN 200320112198 patent/CN2682384Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8102535B2 (en) | 2006-12-31 | 2012-01-24 | Beijing Aerospace Times Optical-Electric Technology Co., Ltd. | Fiber optic gyroscope using a low-polarization and polarization-maintaining hybrid light path |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101852613B (en) | Light transceiving integrated device applied to fiber sensing | |
| CN109579818B (en) | Preparation method of hybrid integrated fiber-optic gyroscope optical chip | |
| US20230027271A1 (en) | Silicon photonics chip-based lidar | |
| CN109579816B (en) | Hybrid integrated optical fiber gyroscope optical chip | |
| CN101216317B (en) | Reciprocity integrated optical modulation chip for optical fiber gyroscope | |
| CN101008569A (en) | Optical fiber gyroscope using mixed optical path of polarization maintaining and low polarization | |
| CN115014318B (en) | Hollow microstructure optical fiber gyroscope | |
| WO2024045451A1 (en) | Fiber-optic gyroscope based on mode division multiplexing and precision improvement method therefor | |
| CN105705907A (en) | Energy-efficient optic gyroscope devices | |
| CN105865433B (en) | Single chip integrated depolarized type optical fibre gyro optical chip | |
| CN204925448U (en) | 2 2 polarization maintaining fiber beam splitter | |
| CN110186448A (en) | A kind of ring laser gyroscope for unmanned navigation chip | |
| JP2019191260A (en) | Coherent light reception module | |
| CN117268364A (en) | Optical fiber gyro integrated optical path structure based on lithium niobate crystal | |
| CN2682384Y (en) | Optical fiber gyroscope | |
| CN202041212U (en) | Integrated optical chip for three-axis optical fiber gyro | |
| CN113865578A (en) | SiN-based integrated optical chip for optical fiber gyroscope based on SiON polarizer | |
| CN1616922A (en) | Optical crystal polarized integrated module | |
| CN202994163U (en) | Fiber-optic gyroscope integrated module and fiber-optic gyroscope system comprising same | |
| CN113884085B (en) | Based on SiO2Integrated optical chip for fiber-optic gyroscope with-SiN coupled chip structure | |
| CN114234954A (en) | Double sensitization optical path integrated optical fiber gyroscope | |
| CN101694387A (en) | Multifunctional integrated waveguide chip for optical fiber gyroscope | |
| CN208333488U (en) | A kind of open-loop optical fiber gyro | |
| CN114397729A (en) | SiN integrated optical chip based on continuous curvature bent waveguide polarizer | |
| CN208874050U (en) | A kind of laser aid and laser system that polarization light polarization direction is adaptive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |