CN1889399A - Surface wave whole optical fiber acousto-optic intensity modulator - Google Patents
Surface wave whole optical fiber acousto-optic intensity modulator Download PDFInfo
- Publication number
- CN1889399A CN1889399A CNA2006100888776A CN200610088877A CN1889399A CN 1889399 A CN1889399 A CN 1889399A CN A2006100888776 A CNA2006100888776 A CN A2006100888776A CN 200610088877 A CN200610088877 A CN 200610088877A CN 1889399 A CN1889399 A CN 1889399A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- fiber
- acoustic
- surface wave
- substrate
- 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
- 239000013307 optical fiber Substances 0.000 title claims description 68
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 230000003993 interaction Effects 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 11
- 238000001259 photo etching Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005530 etching Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 238000010897 surface acoustic wave method Methods 0.000 description 9
- 229920001342 Bakelite® Polymers 0.000 description 5
- 239000004637 bakelite Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Images
Abstract
This invention relates to a surface wave full fiber acoustooptic modulator including a base and a 1x2 single-mode fiber coupler, which applies an etching technology to manufacture an interdigital energy converter, in which, the single port fiber of the fiber coupler is one of interaction of sound and light and adhered on the base along the transmitting direction parallel to the acoustic surface waves after its envelope is ground, the double-port fibers are taken as the input one and output one, the modulator can be used in fiber modulating technology since this invention uses fibers, the input and output fibers are not disconnected, the loss of interpolation of acoustic energy is small.
Description
Technical field
The present invention relates to a kind of surface wave whole optical fiber acousto-optic intensity modulator, this device can be used for belonging to optical fiber communication and sensory field of optic fibre in the optical fiber communication modulation technique.
Technical background
A present class " the full optical fiber acousto-optic of surface wave frequency shifter " or title " surface wave whole optical fiber acousto-optic phase device " all once had report at home and abroad, people such as K.Nosu (UltrasonicsSymposium as United States Naval Research Laboratory, 1983:476-481) and people (optics journal, 1992:12 (7) 668-670) such as Zhejiang University's Zhang Zhongxian all reported this type of device respectively.The structure of this device as shown in Figure 1, the rectangle piezoelectric chip is done substrate 1.Adopt photoetching process making sound interdigital transducer 2 on wafer surface, the surface acoustic wave that it excited is propagated along the length direction of substrate.One section bare fiber grinding off covering as acoustic optic interaction optical fiber 3, is sticked in the substrate in interdigital transducer the place ahead, and direction is vertical with the acoustic propagation direction.Its operation principle is loaded into the rf signal of self-sustained oscillation on the interdigital transducer as shown in Figure 2, inspires the surface acoustic wave that equates with radio frequency signal frequency, propagates along the length direction of substrate.Laser is introduced optical fiber, after surface acoustic wave enters bare fiber, produce acoustic optic interaction with light, the laser frequency of output is changed, the numerical value that optical frequency increases is the frequency of sound wave.
Summary of the invention
The objective of the invention is to overcome the above-mentioned defective of existing apparatus, a kind of surface wave whole optical fiber acousto-optic intensity modulator be provided, this device has that volume is little, little power consumption, job stability are strong, acoustic energy insert loss little, be easy to advantages such as integrated.
The technical solution adopted in the present invention is as follows.Mainly include substrate 1, sound interdigital transducer 2, it is characterized in that: also include 1 * 2 single-mode optical-fibre coupler 4, in substrate 1, adopt photoetching process making sound interdigital transducer 2, the single port optical fiber of fiber coupler 4 is acoustic optic interaction optical fiber 3, after its covering ground off, paste in the substrate 1 along being parallel to the acoustic surface wave propagation direction, dual-port optical fiber is respectively as input optical fibre 5 and output optical fibre 6.
Operation principle of the present invention is modulated to video waiting for transmission or audio signal on the radiofrequency signal as shown in Figure 7 in advance, and the carrier frequency of radiofrequency signal is consistent with the centre frequency of sound interdigital transducer 2.Then modulation signal is loaded on the interdigital transducer 2, produces the surface acoustic wave that intensity changes with transmission signals, propagate, enter in the acoustic optic interaction optical fiber 3 along substrate 1 surface.Laser is introduced acoustic optic interaction optical fiber 3 by input optical fibre 5, form forward direction leaded light ripple, under the effect of optical fiber acoustooptical effect, produce the back guide light wave that intensity changes with transmission signals, back guide light wave is guided on the photoelectric tube by output optical fibre 6, signal demodulation to be transmitted is come out.
Beneficial effect of the present invention: 1,, make this modulator can be used for the optical fiber modulation technique owing to used optical fiber; 2, input, output optical fibre do not interrupt, so acoustic energy insertion loss is little; 3, have also that volume is little, little power consumption, job stability are strong, be easy to advantages such as integrated.
Description of drawings
The full optical fiber acousto-optic of Fig. 1 surface wave frequency shifter structure
The full optical fiber acousto-optic of Fig. 2 surface wave frequency shifter principle
Fig. 3 structural representation of the present invention
Fig. 4 front plan view of the present invention
Fig. 5 plan view from above of the present invention
Fig. 6 side plan view of the present invention
Fig. 7 operation principle of the present invention
Fig. 8 technology of the present invention is made flow chart
Among the figure: 1, substrate, 2, the sound interdigital transducer, 3, acoustic optic interaction optical fiber, 4, fiber coupler, 5, input optical fibre, 6.Output optical fibre.
Embodiment
Embodiment among the present invention is referring to Fig. 3～Fig. 6.Mainly include substrate 1, sound interdigital transducer 2, acoustic optic interaction optical fiber 3,1 * 2 single-mode optical-fibre coupler 4, input optical fibre 5, output optical fibre 6.In substrate 1, adopt photoetching process making sound interdigital transducer 2, the single port optical fiber of fiber coupler 4 is acoustic optic interaction optical fiber 3, after its covering ground off, paste in the substrate 1 along being parallel to the acoustic surface wave propagation direction, dual-port optical fiber is respectively as input optical fibre 5 and output optical fibre 6.
Each several part title, process conditions and act on as follows:
Substrate 1: use quartz crystal to make with piezoelectric effect.Be shaped as the rectangle thin slice, the surface normal direction is that Y direction, the length direction of crystal is that Z-direction, Width are X-direction.The cutting of the orientation of wafer with the technological requirement of grinding and polishing is: the upper surface orientation error that must make transducer can not surpass 5 ', fineness reaches 11 grades, evenness less than 1 aperture.Its effect is to utilize piezoelectric effect to produce surface acoustic wave, spreads into along its length in the acoustic optic interaction optical fiber.Using the purpose of quartz crystal is in order to make substrate and by the optical fiber that fused quartz is made more approaching acoustic impedance to be arranged, to reduce the insertion loss of surface acoustic wave energy as far as possible.
Sound interdigital transducer 2: form by two shapes such as finger-shaped and the transducer that crosses one another.Material therefor is a silver, uses photoetching process to be made in substrate.Technological requirement is for can not severed finger and even refer to.Effect is to inspire ultrasonic surface wave with the modulated RF signal of telecommunication.
Acoustic optic interaction optical fiber 3: be monomode fiber, covering is ground off becomes bare fiber, along the base length direction, promptly is parallel to the acoustic surface wave propagation direction and sticks in the substrate 1.Effect is to utilize the optical fiber acoustooptical effect to make forward direction leaded light wave interaction in surface acoustic wave and the optical fiber, produces light intensity with the back guide light wave that acoustical power changes, and reaches the purpose that laser intensity is modulated.
Fiber coupler 4: be 1 * 2 structure, wherein the optical fiber that links to each other with single port is as acoustic optic interaction optical fiber, two optical fiber that link to each other with dual-port are respectively as input optical fibre 5, output optical fibre 6, and its effect is that acoustic optic interaction optical fiber and input optical fibre 5, output optical fibre 6 are linked together.
Input optical fibre 5: be monomode fiber, laser is introduced input optical fibre, form forward direction leaded light ripple and enter in the acoustic optic interaction optical fiber, and anti-surface acoustic wave direction is propagated.
Output optical fibre 6: be monomode fiber, after forward direction leaded light ripple in the acoustic optic interaction optical fiber and surface acoustic wave interact, produce back guide light wave, from output optical fibre, export, guide to and go demodulation in the photelectric receiver.
The manufacture craft flow process of surface wave whole optical fiber acousto-optic intensity modulator is made up of following 5 key steps as shown in Figure 8:
1, the directed and grinding of substrate crystal: the substrate crystal is got ready according to above-mentioned technological requirement.
2, the making of sound interdigital transducer: according to the sound interdigital transducer size that designs, prior prefabricated mask utilizes photoetching process to finish making.Main technique comprises: silver-plated, even glue, exposure, development, etching, remove photoresist.
3, the grinding of bare fiber covering: the single port optical fiber of 1 * 2 fiber coupler is ground off covering.
4, bonding optical fiber: with bare fiber with adhering with epoxy resin to the length direction of substrate.
5, shelve and go between: with base wafer with adhering with epoxy resin to bakelite plate, on the shelf that will import simultaneously, output optical fibre is fixed on bakelite plate links to each other; With the low temperature flatiron will go between be welded to rivet on the bakelite plate from the signal input part of sound interdigital transducer on; Then bakelite plate is fixed in the metal shell, and rivet on the bakelite plate and the cable socket on the shell is coupled together with lead-in wire.
Claims (1)
1, surface wave whole optical fiber acousto-optic intensity modulator, mainly include substrate (1), it is characterized in that: also include 1 * 2 single-mode optical-fibre coupler (4), go up employing photoetching process making sound interdigital transducer (2) in substrate (1), the single port optical fiber of fiber coupler (4) is acoustic optic interaction optical fiber (3), after its covering ground off, paste in the substrate (1) along being parallel to the acoustic surface wave propagation direction, dual-port optical fiber is respectively as input optical fibre (5) and output optical fibre (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100888776A CN100539476C (en) | 2006-07-24 | 2006-07-24 | Surface wave whole optical fiber acousto-optic intensity modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100888776A CN100539476C (en) | 2006-07-24 | 2006-07-24 | Surface wave whole optical fiber acousto-optic intensity modulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1889399A true CN1889399A (en) | 2007-01-03 |
| CN100539476C CN100539476C (en) | 2009-09-09 |
Family
ID=37578660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100888776A Expired - Fee Related CN100539476C (en) | 2006-07-24 | 2006-07-24 | Surface wave whole optical fiber acousto-optic intensity modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100539476C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901580A (en) * | 2011-07-25 | 2013-01-30 | 上海工程技术大学 | Multicoupler-based surface acoustic wave temperature sensor |
| CN107666296A (en) * | 2017-09-27 | 2018-02-06 | 合肥晶威特电子有限责任公司 | A kind of processing method of quartz-crystal resonator |
-
2006
- 2006-07-24 CN CNB2006100888776A patent/CN100539476C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901580A (en) * | 2011-07-25 | 2013-01-30 | 上海工程技术大学 | Multicoupler-based surface acoustic wave temperature sensor |
| CN102901580B (en) * | 2011-07-25 | 2014-05-28 | 上海工程技术大学 | Multicoupler-based surface acoustic wave temperature sensor |
| CN107666296A (en) * | 2017-09-27 | 2018-02-06 | 合肥晶威特电子有限责任公司 | A kind of processing method of quartz-crystal resonator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100539476C (en) | 2009-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4874685B2 (en) | Light modulator | |
| JP2012027499A (en) | Optical modulator | |
| US4312562A (en) | Optical control device | |
| JP3587757B2 (en) | Optical waveguide type optical modulator with output light monitor | |
| JP2006284961A (en) | Optical modulator | |
| CN101645698B (en) | Bridge type surface acoustic wave transducer in micro-optical-electro-mechanical gyroscope | |
| CN100539476C (en) | Surface wave whole optical fiber acousto-optic intensity modulator | |
| CN107797314B (en) | All-fiber optical frequency shifter based on acousto-optic effect and frequency shifting method thereof | |
| CN104991356B (en) | A kind of MZ type acousto-optic modulators based on SOI | |
| JP7196736B2 (en) | Optical waveguide element and optical waveguide device | |
| JPS6394205A (en) | Optical excitation device for bidirectional transmission | |
| CN1710482A (en) | Acoustic optical Q-regulating method for two-clad optical-fiber laser and apparatus | |
| CN115586681A (en) | Monolithic heterogeneous integrated optical parametric amplification chip | |
| WO2022163724A1 (en) | Optical modulator and optical transmission device using same | |
| CN112596254B (en) | Compact polarization beam splitter based on photonic crystal | |
| CN1888951A (en) | Surface wave optical fiber acousto-electro optical modulator | |
| CN114859579A (en) | Novel push-pull type efficient broadband acousto-optic modulator and preparation method thereof | |
| CN113534507A (en) | Optical modulator | |
| CN201083902Y (en) | Surface wave optical fiber acoustic-electro-optic modulator | |
| CN105158848A (en) | Multi-mode waveguide array coupling structure of glass substrate, and manufacturing method thereof | |
| CN2896310Y (en) | Multi-way light power distributer | |
| CN111678612B (en) | On-chip integrated autocorrelator based on semiconductor nanowires | |
| EP4224247A1 (en) | Optical waveguide element, and optical modulation device and optical transmission apparatus using same | |
| JP2003270597A (en) | Optical variable attenuating device | |
| JP3947211B1 (en) | Thermoacoustic light switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20100724 |