CN112462476B - Mini type refrigerationless short-wave SLD light source for micro optical fiber gyroscope - Google Patents
Mini type refrigerationless short-wave SLD light source for micro optical fiber gyroscope Download PDFInfo
- Publication number
- CN112462476B CN112462476B CN202011262760.1A CN202011262760A CN112462476B CN 112462476 B CN112462476 B CN 112462476B CN 202011262760 A CN202011262760 A CN 202011262760A CN 112462476 B CN112462476 B CN 112462476B
- Authority
- CN
- China
- Prior art keywords
- light source
- tube
- optical fiber
- mini
- wave
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/721—Details
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4256—Details of housings
- G02B6/426—Details of housings mounting, engaging or coupling of the package to a board, a frame or a panel
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention belongs to the field of optoelectronic devices, and particularly relates to a mini-type refrigeration-free short-wave SLD light source for a miniaturized fiber-optic gyroscope, which comprises a light source shell and a tapered lens fiber-optic assembly, wherein fixing holes are asymmetrically formed in the upper part and the lower part of the light source shell, namely the two fixing holes are respectively arranged at the positions of the right center or the left center, two pins are respectively led out from the left and the right of one fixing hole, an access port is formed in the left side or the right side of the shell, and the tapered lens fiber-optic assembly is accessed from the access port; the problems of mini-type light source coupling, packaging, influence of redundant materials and the like are solved, the requirement of the miniature gyroscope on the mini-type SLD light source is met, the reliability of the miniature gyroscope is improved, and the production capacity and the yield of the miniature gyroscope are greatly improved.
Description
Technical Field
The invention belongs to the field of optoelectronic devices, and particularly relates to a mini type refrigeration-free short-wave SLD light source for a miniaturized fiber-optic gyroscope.
Background
In the prior art, a pigtail-free cos (chip On submounts) type short-wave SLD light source is placed at a Super Luminescent Diode (SLD) light source position shown in fig. 1, so as to achieve the purpose of reducing the size.
In the prior art, because the gyroscope is not hermetically packaged, in the original structure, a development and production unit firstly couples an SLD light source with an optical fiber with the diameter of 40 microns, and then protects the SLD chip and the optical fiber (the optical fiber part coupled with the light source) by using an optical matching adhesive, so that the influence of environmental redundancy, water vapor and the like on the SLD chip and an optical coupling light path is avoided, and the normal work of the gyroscope in the full temperature range (minus 40-70 ℃) is ensured.
However, the prior art has the following problems:
1) the coupling of the light source and the optical fiber is completed by a gyroscope production unit, the gyroscope unit is required to master the key technology of light source coupling, the technical threshold is high, the production unit and the production capacity of the gyroscope are limited, and the mass production of the miniature optical fiber gyroscope is not facilitated;
2) the morphology and filling condition of the optical matching glue on the cavity surface of the SLD chip can change the reflectivity of the cavity surface and influence the photoelectric parameters of the SLD; the spatial distribution of the light field can be changed, and the coupling efficiency is influenced, so that the normal work and the yield of the gyroscope are influenced;
3) the SLD light source is fixed by adopting an adhesive bonding mode, so that the heat dissipation condition is poor and the impact resistance is poor;
4) the chip and the lead are not externally packaged and exposed in a process environment (or a use environment), and the parameters and reliability of the SLD are influenced by excess materials, environmental water vapor and the like in the process;
5) when a fault occurs, the optical matching glue on the cavity surface of the SLD chip is difficult to clean (or clean), which increases the difficulty of the SLD light source failure analysis.
Disclosure of Invention
Aiming at the practical problems that the technical threshold is high, the reliability is influenced and failure analysis is difficult to test due to the fact that an existing miniature gyroscope adopts a COS (chip scale diode) SLD (light source) light source, the invention provides a mini-type refrigeration-free short-wave SLD light source for the miniature fiber optic gyroscope, which comprises a light source shell and a tapered lens optical fiber assembly, wherein the upper part and the lower part of the light source shell are asymmetrically provided with fixing holes, namely the two fixing holes are respectively arranged at the positions with the centers on the right or left, one of the two fixing holes is arranged at the position with the centers on the right and the other one on the left, the left side or the right side of the shell is provided with an access port, and the tapered lens optical fiber assembly is accessed from the access port; a gold-plated Kovar support is arranged in a cavity of the light source shell, and the conical lens optical fiber assembly is fixed on the Kovar support by utilizing the two L-shaped supports.
Furthermore, the distance between the positioning hole arranged at the position of the center on the right side and the right side of the light source tube shell is 3.8 +/-0.1 mm, and the distance between the positioning hole arranged at the position of the center on the left side and the left side of the light source tube shell is 3.4 +/-0.1 mm.
Further, the length of the light source shell is 9.0 +/-0.1 mm, the width is 6.0 +/-0.1 mm, and the height is 4.6 +/-0.1 mm; the length of the cavity in the light source shell is 7.4 +/-0.1 mm, the width is 4.2 +/-0.1 mm, and the height is 3.8 +/-0.1 mm.
Furthermore, the tapered lens optical fiber assembly comprises a gold-plated nickel tube, a silicone tube and an open tube, wherein the optical fiber in the junction area of the bare fiber and the coated optical fiber is arranged in the gold-plated nickel tube, the coated optical fiber with the thickness of 1-2 cm is arranged in the gold-plated nickel tube, the silicone tube is sleeved at the position of the bare fiber outside the gold-plated nickel tube, and the open tube is sleeved at the junction area of the gold-plated nickel tube and the silicone tube.
Furthermore, the length of the gold-plated nickel tube is 4.2 +/-0.1 mm, the length of the silica gel tube is 1 +/-0.5 mm, and the length of the opening tube is 2.3 +/-0.1 mm.
Furthermore, a heat-shrinkable tube is sleeved outside the tube shell optical fiber sleeve and the opening tube.
Furthermore, the silicone tube is sleeved outside the gold-plated nickel tube.
Further, the gold-plated nickel tube and the access port are welded by adopting PbSn welding flux, and the light source shell and the sealing cover are hermetically packaged by adopting a parallel seam welding process.
The inventor of the invention carries out deep research on the distribution diagram of the internal elements of the gyroscope, fully and reasonably utilizes the position space of the original light source, designs a 2-pin mini type refrigeration-free short-wave SLD light source with tail fibers and air-tight encapsulation, can replace the original COS type SLD light source in situ, solves the problems of mini type light source coupling, encapsulation, excess influence and the like, meets the requirement of the miniature gyroscope on the mini type SLD light source, is beneficial to improving the reliability of the miniature gyroscope, and greatly improves the production capacity and the yield of the miniature gyroscope.
Drawings
FIG. 1 is a schematic view of a mini-type uncooled short-wave SLD light source for a miniaturized fiber optic gyroscope according to the present invention;
the LED chip comprises a first pin lead, a second pin lead, a third pin lead, a fourth pin lead, a fifth pin lead, a sixth pin lead, a fifth pin lead, a sixth pin lead, an optical fiber sleeve sealing solder, a sixth pin lead, a fifth pin lead, a sixth pin lead, an opening tube, a sixth pin lead, a conical lens optical fiber assembly, a sixth pin lead, a fifth pin lead, a sixth pin lead, a fifth pin lead, a sixth pin lead, a fiber sleeve sealing solder, a 6, a gold-plated nickel tube, a 7, an opening tube, 8, a conical lens optical fiber assembly, 9, a silicone tube, a 10, an L-shaped support, 11, a gold-plated Kovar support, 12, a 13, an SLD chip.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the practical problems that the technical threshold is high, the reliability is influenced and failure analysis is difficult to test due to the fact that the existing miniature gyroscope adopts a COS SLD light source, the internal elements of the mini-type refrigeration-free short-wave SLD light source are welded by alloy welding materials, the optical fiber is positioned by laser welding, and finally the airtight packaging is carried out, so that a series of problems existing in the use of the COS SLD light source in the miniature gyroscope can be effectively solved.
The invention provides a mini-type refrigeration-free short-wave SLD light source for a fiber-optic gyroscope, which comprises a light source shell and a tapered lens optical fiber component, wherein the upper part and the lower part of the light source shell are asymmetrically provided with fixing holes, namely the two fixing holes are positioned at the positions with the centers on the right and the left, the left and the right of one fixing hole are respectively led out two pins, the left side or the right side of the shell is provided with an access port, and the tapered lens optical fiber component is accessed from the access port
As in fig. 1, this embodiment; in the embodiment, the inner size of the cavity of the light source shell is 7.2mm long, 4.2mm wide and 3.8mm high; the size of the bracket is as follows: the length is 4.6mm, the width is 3.0mm, and the height is 1.3 mm; a 2mm wide area is left in front of the fiber ferrule as a space to hold the fiber stub for coupling. The distance between the other three directions and the wall of the tube shell is about 0.6mm, and the structure is very compact.
In the embodiment, a mini type tapered lens optical fiber component with the small diameter of phi 40 mu m is adopted, and the phi 40 mu m single-mode optical fiber is very thin and is easy to break in technological operation, especially a bare fiber part without a coating layer. Therefore, under the condition of reducing the length of each part of the tapered lens optical fiber assembly, an optical fiber guarantee design is added, the optical fiber near the junction area of the bare fiber and the coated layer optical fiber is in a gold-plated nickel tube, the optical fiber with a 1-2 mm long strip and a coating layer is in the gold-plated nickel tube, then a 2.5-3.5 mm long silica gel tube is sleeved on the gold-plated nickel tube to protect the optical fiber, and finally the junction area of the gold-plated nickel tube and the silica gel tube is protected by an open tube, so that the protection of the ultra-fine diameter optical fiber is realized. The external dimensions of the tapered lens optical fiber component are as follows: 1 kovar tube 3.5 plus or minus 0.1mm, gold-plated bare fiber 1.5 plus or minus 0.1mm, 2 gold-plated nickel tube 4.2mm plus or minus 0.1mm, 3 opening tube 2.3 plus or minus 0.1mm, and silicone tube 1 plus or minus 0.5 mm.
As shown in figure 1, the Mini type SLD light source comprises a light source shell 15 and a conical lens optical fiber assembly 8, wherein the light source part is arranged inside the light source shell 15 and comprises an L-shaped support 10, a kovar support 11, an AlN heat sink 12, an SLD chip 13 and a zener tube 14, an aluminum nitride (AlN) heat sink and the kovar support are welded by AuGe welding flux, the SLD chip and the heat sink are welded by AuSn welding flux, COS type SLDs and a tube shell bottom plate are welded by indium-silver-lead welding flux, optical fiber positioning is performed by laser welding, an optical fiber metal nickel tube and an optical fiber sleeve are welded by PbSn welding flux, and the tube shell and a sealing cover are hermetically packaged by adopting a parallel seam welding process.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "outer", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "rotated," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The mini type refrigeration-free short-wave SLD light source for the optical fiber gyroscope is characterized by comprising a light source shell and a tapered lens optical fiber assembly, wherein the upper part and the lower part of the light source shell are asymmetrically provided with fixing holes, namely the two fixing holes are respectively positioned at the right center or the left center, one of the two fixing holes is positioned at the right center or the left center, the other fixing hole is positioned at the left center, the left side or the right side of the shell is provided with an access port, and the tapered lens optical fiber assembly is accessed from the access port; a gold-plated Kovar support is arranged in a cavity of the light source shell, and the conical lens optical fiber assembly is fixed on the Kovar support by utilizing the two L-shaped supports.
2. The mini-type uncooled short-wave SLD light source package as claimed in claim 1, wherein the positioning hole located at the right position of the center is 3.8 ± 0.1mm from the right side of the light source package, and the positioning hole located at the left position of the center is 3.4 ± 0.1mm from the left side of the light source package.
3. The mini-type frigorific shortwave SLD light source casing for the fiber-optic gyroscope according to claim 1, wherein the light source casing has a length of 9.0 ± 0.1mm, a width of 6.0 ± 0.1mm and a height of 4.6 ± 0.1 mm; the length of the cavity in the light source shell is 7.4 +/-0.1 mm, the width is 4.2 +/-0.1 mm, and the height is 3.8 +/-0.1 mm.
4. The mini type frigorific short-wave SLD light source case for the optical fiber gyroscope, as claimed in claim 1, wherein the tapered lens optical fiber assembly includes a gold-plated nickel tube, a silicone tube, and an open tube, the optical fiber at the interface area of the bare fiber and the coated optical fiber is disposed in the gold-plated nickel tube, and the coated optical fiber of 1-2 cm is disposed in the gold-plated nickel tube, the silicone tube is disposed at the bare fiber position outside the gold-plated nickel tube, and the open tube is disposed at the interface area of the gold-plated nickel tube and the silicone tube.
5. The mini-type uncooled short-wave SLD light source package for a fiber-optic gyroscope of claim 4, wherein the length of the nickel-plated tube is 4.2 ± 0.1mm, the length of the silica gel tube is 1 ± 0.5mm, and the length of the open tube is 2.3 ± 0.1 mm.
6. The mini-type uncooled short-wave SLD light source case for the fiber-optic gyroscope, as claimed in claim 4, wherein the gold-plated nickel tube is welded to the inlet by PbSn solder, and the light source case and the cover are hermetically sealed by parallel seam welding.
7. The mini-type refrigerationless short-wave SLD light source tube shell for the fiber-optic gyroscope, as claimed in claim 4, wherein the heat-shrinkable tube is sleeved outside the tube shell fiber-optic sleeve and the opening tube.
8. The mini type frigorific short-wave SLD light source case for the fiber-optic gyroscope, as claimed in claim 4, wherein the silicone tube is sleeved outside the gold-plated nickel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262760.1A CN112462476B (en) | 2020-11-12 | 2020-11-12 | Mini type refrigerationless short-wave SLD light source for micro optical fiber gyroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262760.1A CN112462476B (en) | 2020-11-12 | 2020-11-12 | Mini type refrigerationless short-wave SLD light source for micro optical fiber gyroscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112462476A CN112462476A (en) | 2021-03-09 |
| CN112462476B true CN112462476B (en) | 2022-06-10 |
Family
ID=74825665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011262760.1A Active CN112462476B (en) | 2020-11-12 | 2020-11-12 | Mini type refrigerationless short-wave SLD light source for micro optical fiber gyroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112462476B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000028370A (en) * | 1998-07-14 | 2000-01-28 | Nippon Telegr & Teleph Corp <Ntt> | Random polarization light source |
| WO2002093226A1 (en) * | 2001-05-15 | 2002-11-21 | Fibersense Technology Corporation | Method of winding optical fibre |
| CN202735549U (en) * | 2012-06-27 | 2013-02-13 | 武汉光迅科技股份有限公司 | Integral receiving and transmitting device |
| CN104422437A (en) * | 2013-09-10 | 2015-03-18 | 北京世维通科技发展有限公司 | Fiber-optic gyroscope without optical fiber fusion point and manufacturing method of fiber-optic gyroscope |
| FR3052859A1 (en) * | 2016-06-20 | 2017-12-22 | Ixblue | MEASUREMENT SYSTEM AND GYROMETER COMPRISING SUCH A SYSTEM |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2842454Y (en) * | 2005-11-21 | 2006-11-29 | 天津爱天光电子科技有限公司 | Optical-fiber light source for optical-fiber gyroscope |
-
2020
- 2020-11-12 CN CN202011262760.1A patent/CN112462476B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000028370A (en) * | 1998-07-14 | 2000-01-28 | Nippon Telegr & Teleph Corp <Ntt> | Random polarization light source |
| WO2002093226A1 (en) * | 2001-05-15 | 2002-11-21 | Fibersense Technology Corporation | Method of winding optical fibre |
| CN202735549U (en) * | 2012-06-27 | 2013-02-13 | 武汉光迅科技股份有限公司 | Integral receiving and transmitting device |
| CN104422437A (en) * | 2013-09-10 | 2015-03-18 | 北京世维通科技发展有限公司 | Fiber-optic gyroscope without optical fiber fusion point and manufacturing method of fiber-optic gyroscope |
| FR3052859A1 (en) * | 2016-06-20 | 2017-12-22 | Ixblue | MEASUREMENT SYSTEM AND GYROMETER COMPRISING SUCH A SYSTEM |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112462476A (en) | 2021-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211603627U (en) | Optical module | |
| CN212031793U (en) | Optical module | |
| US20020085598A1 (en) | Low cost optical bench having high thermal conductivity | |
| CN112202046A (en) | Novel TO packaging structure | |
| CN109546526A (en) | The coaxial active package structure of electro-absorption modulation sealed laser | |
| CN215416012U (en) | 400G silicon optical integrated module | |
| CN104319620B (en) | Device and light emission component for light emission component | |
| CN112462476B (en) | Mini type refrigerationless short-wave SLD light source for micro optical fiber gyroscope | |
| JP2004047831A (en) | Light receiving element module | |
| CN209169632U (en) | The coaxial active package structure of electro-absorption modulation sealed laser | |
| CN108615773B (en) | Photoelectric detector packaging shell for surface mounting | |
| CN212207763U (en) | Coupling structure of silicon optical chip and active chip | |
| CN212062997U (en) | Packaging structure of semiconductor laser | |
| TWI233509B (en) | Optoelectronic package structure and process for planar passive optical and optoelectronic devices | |
| CN113534359A (en) | Optical module | |
| CN214044333U (en) | Airtight packaging structure of laser chip | |
| CN210668367U (en) | Optical device | |
| CN215266336U (en) | Coaxial photodiode detector | |
| CN216792511U (en) | Optical module | |
| CN112864793A (en) | Laser chip airtight packaging structure and packaging method | |
| CN213026141U (en) | Air-tight packaging structure of photoelectronic chip | |
| CN211789980U (en) | Packaging structure of high-speed semiconductor laser diode capable of refrigerating | |
| CN113671639A (en) | Optical module structure and manufacturing method thereof | |
| CN210838436U (en) | TO packaged semiconductor laser with built-in isolator capable of emitting light in parallel | |
| JPS584836B2 (en) | Optical semiconductor device package |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |