CN203965727U - Piezoelectric ceramics light modulator - Google Patents
Piezoelectric ceramics light modulator Download PDFInfo
- Publication number
- CN203965727U CN203965727U CN201420408887.3U CN201420408887U CN203965727U CN 203965727 U CN203965727 U CN 203965727U CN 201420408887 U CN201420408887 U CN 201420408887U CN 203965727 U CN203965727 U CN 203965727U
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- piezoelectric ceramics
- lens
- knife
- modulation
- optical fiber
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Abstract
The utility model relates to a kind of piezoelectric ceramics light modulator, mainly by optical fiber (1), condenser (2), first lens (3), piezoelectric ceramics (4) and the second lens (5) form, wherein optical fiber (1), collimating mirror (2), first lens (3), piezoelectric ceramics (4) and the second lens (5) set gradually along optical path direction, in described piezoelectric ceramics (4), be provided with modulation cutter head (6), the center of modulation cutter head (6) is provided with the modulation edge of a knife (7), light is through optical fiber (1), collimating mirror (2) and first lens (3) are by the point of a knife of the ovennodulation edge of a knife (7), wherein, piezoelectric ceramics (4) is high-precision piezoelectric ceramics, optical fiber (1) is single-mode fiber.The piezoelectric ceramics light modulator that the utility model provides has used high-precision piezoelectric ceramics, is inside provided with the high-precision edge of a knife, utilizes point of a knife can make light accurately modulate, and can effectively evade interference, obtains high-precision modulation signal.
Description
Technical field
The utility model relates to a kind of device that adopts piezoelectric ceramics light beam to be carried out to intensity modulated, relates in particular to a kind of piezoelectric ceramics light modulator, belongs to piezoelectric ceramics field.
Background technology
Laser Modulation refers to be overregulated human wants information exchange and control is added on laser wave.Laser beam has the unrivaled temporal coherence of other light beams and spatial coherence, and is easy to modulation, adds that laser light wave frequency is high, and energy transmission of information amount is very large.Laser-beam divergence angle is very little simultaneously, and luminous energy high concentration is convenient to again maintain secrecy in ensureing propagation distance, so laser is the ideal carrier that optical information transmits.
Utilize acousto-optic modulator to realize the intensity modulation to laser beam.Acousto-optic modulator is based on the work of acoustooptic effect principle.The periodicity that the density density of ultrasonic field medium distributes has formed acoustic grating, and pitch equals hyperacoustic wavelength.The light beam generation diffraction of incident, and diffraction intensity and hyperacoustic intensity is directly proportional, and utilizes this principle to realize the modulation to laser beam.
Utilize the modulation of loudspeaker to laser beam intensity.Loudspeaker utilizes tone currents to change the alternating magnetic field producing and forces voice coil loudspeaker voice coil to produce mechanical vibration, drive vibrating diaphragm vibration, and the frequency of vibrating diaphragm vibration is directly proportional to the frequency of tone currents.Select frequency of operation loudspeaker on the low side according to this principle, vibrating diaphragm can alternative method function piezoelectric ceramics micrometric displacement topworks in a), drive chopper to complete the intensity modulated to light beam, the precision that is this kind of method frequency stability and displacement control is limited.
Utility model content
In order to overcome the deficiencies in the prior art, resolve the problem of prior art, make up the deficiency of existing existing product in the market.
The utility model provides a kind of piezoelectric ceramics light modulator, mainly formed by optical fiber, condenser, first lens, piezoelectric ceramics and the second lens, wherein optical fiber, collimating mirror, first lens, piezoelectric ceramics and the second lens set gradually along optical path direction, in described piezoelectric ceramics, be provided with modulation cutter head, the center of modulation cutter head is provided with the modulation edge of a knife, light after optical fiber, collimating mirror and first lens through the point of a knife of the ovennodulation edge of a knife, wherein, piezoelectric ceramics is high-precision piezoelectric ceramics, and optical fiber is single-mode fiber.
The piezoelectric ceramics light modulator that the utility model provides has used high-precision piezoelectric ceramics, is inside provided with the high-precision edge of a knife, utilizes point of a knife can make light accurately modulate, and can effectively evade interference, obtains high-precision modulation signal.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Reference numeral: 1-optical fiber; 2-collimating mirror; 3-first lens; 4-piezoelectric ceramics; 5-the second lens; 6-modulates cutter head; 7-modulates the edge of a knife.
Embodiment
Understand and implement the utility model for the ease of those of ordinary skill in the art, below in conjunction with the drawings and the specific embodiments, the utility model being described in further detail.
Be illustrated in figure 1 structural representation of the present utility model, formed by optical fiber 1, condenser 2, first lens 3, piezoelectric ceramics 4 and the second lens 5, wherein optical fiber 1, collimating mirror 2, first lens 3, piezoelectric ceramics 4 and the second lens 5 set gradually along optical path direction, in described piezoelectric ceramics 4, be provided with modulation cutter head 6, the center of modulation cutter head 6 is provided with the modulation edge of a knife 7, light after optical fiber 1, collimating mirror 2 and first lens 3 through the point of a knife of the ovennodulation edge of a knife 7, wherein, piezoelectric ceramics 4 is high-precision piezoelectric ceramics, and optical fiber 1 is single-mode fiber.
At light beam after the elementary collimation of single-mode fiber 1, utilize collimating mirror 2 pointolite of single-mode fiber 1 outgoing to be become to the light source of parallel outgoing, in light path, utilize the first convex lens 3 to be converged at fixing High Precision Piezoelectric Ceramic 4, a modulation cutter head 6 is installed on piezoelectric ceramics 4, there is the modulation edge of a knife 7 above, making to modulate the remittance focal spot focusing that the edge of a knife 7 is positioned at light beam just cuts, make light beam become the signal of alternation, after focus, separately put the second convex lens 5, making its focus and light beam converge focus overlaps, like this through the second convex lens 5, light beam becomes again directional light.In signal modulation, Chang Yiyi high frequency sinusoidal signal is as carrier signal, and a sinusoidal signal has amplitude, frequency, three parameters of phase place, can modulate these three parameters, is called amplitude modulation, frequency modulation and phase modulation.Due to the very high frequency of laser wave, while carrying out external modulation as required, frequency modulation and phase modulation are difficult to realize, so system adopts the method for amplitude modulation to modulate.Modulation is to give certain feature to measuring-signal, and this feature is provided by the signal as carrier, and Chang Yiyi high frequency sinusoidal signal or pulse signal are as carrier, and this carrier is called carrier signal.Be used for changing a certain parameter of carrier signal, as the signal of amplitude, frequency, phase place is called modulation signal, be called modulated signal through the carrier signal of ovennodulation.
The piezoelectric ceramics light modulator that the utility model provides has used high-precision piezoelectric ceramics, is inside provided with the high-precision edge of a knife, utilizes point of a knife can make light accurately modulate, and can effectively evade interference, obtains high-precision modulation signal.
The embodiment of the above is preferred embodiments of the present utility model; not limit concrete practical range of the present utility model with this; scope of the present utility model comprises and is not limited to this embodiment, and the equivalence that all shapes according to the utility model, structure are done changes all in protection domain of the present utility model.
Claims (1)
1. a piezoelectric ceramics light modulator, it is characterized in that: described piezoelectric ceramics light modulator is mainly by optical fiber (1), condenser (2), first lens (3), piezoelectric ceramics (4) and the second lens (5) form, wherein optical fiber (1), collimating mirror (2), first lens (3), piezoelectric ceramics (4) and the second lens (5) set gradually along optical path direction, in described piezoelectric ceramics (4), be provided with modulation cutter head (6), the center of modulation cutter head (6) is provided with the modulation edge of a knife (7), light is through optical fiber (1), collimating mirror (2) and first lens (3) are by the point of a knife of the ovennodulation edge of a knife (7), wherein, piezoelectric ceramics (4) is high-precision piezoelectric ceramics, optical fiber (1) is single-mode fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420408887.3U CN203965727U (en) | 2014-07-18 | 2014-07-18 | Piezoelectric ceramics light modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420408887.3U CN203965727U (en) | 2014-07-18 | 2014-07-18 | Piezoelectric ceramics light modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203965727U true CN203965727U (en) | 2014-11-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420408887.3U Expired - Fee Related CN203965727U (en) | 2014-07-18 | 2014-07-18 | Piezoelectric ceramics light modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203965727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155751A (en) * | 2014-07-18 | 2014-11-19 | 奉化市宇创产品设计有限公司 | Piezoelectric ceramic light modulator |
-
2014
- 2014-07-18 CN CN201420408887.3U patent/CN203965727U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155751A (en) * | 2014-07-18 | 2014-11-19 | 奉化市宇创产品设计有限公司 | Piezoelectric ceramic light modulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20150718 |
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| EXPY | Termination of patent right or utility model |