CN104155751A - Piezoelectric ceramic light modulator - Google Patents
Piezoelectric ceramic light modulator Download PDFInfo
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- CN104155751A CN104155751A CN201410353412.3A CN201410353412A CN104155751A CN 104155751 A CN104155751 A CN 104155751A CN 201410353412 A CN201410353412 A CN 201410353412A CN 104155751 A CN104155751 A CN 104155751A
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- piezoelectric ceramic
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- optical fiber
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Abstract
The invention relates to a piezoelectric ceramic light modulator which mainly consists of an optical fiber (1), a condensing lens (2), a first lens (3), a piezoelectric ceramic (4) and a second lens (5), wherein the optical fiber (1), the condensing lens (2), the first lens (3), the piezoelectric ceramic (4) and the second lens (5) are arranged in the direction of the light path in sequence; a modulation cutter head (6) is arranged in the piezoelectric ceramic (4); a modulation cutter edge (7) is arranged in the center position of the modulation cutter head (6); lights pass through a cutter tip of the modulation cutter edge (7) after passing through the optical fiber (1), the condensing lens (2) and the first lens (3); the piezoelectric ceramic (4) is a high-precision piezoelectric ceramic; the optical fiber (1) is a single mode fiber. According to the piezoelectric ceramic light modulator provided by the invention, the high-precision piezoelectric ceramic is used, the high-precision cutter edge is arranged inside the piezoelectric ceramic light modulator, the lights can be accurately modulated by utilization of the cutter tip, interference can be effectively evaded, and high-precision modulating signals can be obtained.
Description
Technical field
The present invention relates to a kind of piezoelectric ceramics that adopts and light beam is carried out to the device of intensity modulated, relate in particular to a kind of piezoelectric ceramics light modulator, belong 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 when guaranteeing 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.According to this principle, select frequency of operation loudspeaker on the low side, 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.
Summary of the invention
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 invention provides a kind of piezoelectric ceramics light modulator, mainly by optical fiber, condenser, first lens, piezoelectric ceramics and the second lens, formed, 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 is the point of a knife by the ovennodulation edge of a knife through optical fiber, collimating mirror and first lens, wherein, piezoelectric ceramics is high-precision piezoelectric ceramics, and optical fiber is single-mode fiber.
Piezoelectric ceramics light modulator provided by the invention 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.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
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
For the ease of those of ordinary skills, understand and implement the present invention, below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
Be illustrated in figure 1 structural representation of the present invention, by optical fiber 1, condenser 2, first lens 3, piezoelectric ceramics 4 and the second lens 5, formed, 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 the point of a knife by the ovennodulation edge of a knife 7 through optical fiber 1, collimating mirror 2 and first lens 3, 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, through the carrier signal of ovennodulation, be called modulated signal.
Piezoelectric ceramics light modulator provided by the invention 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 better embodiment of the present invention; not with this, limit specific embodiment of the invention scope; scope of the present invention comprises and is not limited to this embodiment, and the equivalence that all shapes according to the present invention, structure are done changes all in protection scope of the present invention.
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, optical fiber (1) wherein, 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 |
|---|---|---|---|
| CN201410353412.3A CN104155751A (en) | 2014-07-18 | 2014-07-18 | Piezoelectric ceramic light modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353412.3A CN104155751A (en) | 2014-07-18 | 2014-07-18 | Piezoelectric ceramic light modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104155751A true CN104155751A (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410353412.3A Pending CN104155751A (en) | 2014-07-18 | 2014-07-18 | Piezoelectric ceramic light modulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115542533A (en) * | 2022-09-16 | 2022-12-30 | 中国人民解放军国防科技大学 | Modulation control integrated piezoelectric ceramic phase modulator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005173255A (en) * | 2003-12-11 | 2005-06-30 | Hitachi Maxell Ltd | Variable light attenuator |
| CN1844993A (en) * | 2006-02-17 | 2006-10-11 | 中国科学院上海光学精密机械研究所 | Amplitude Modulation Effect Compensation Device |
| CN203965727U (en) * | 2014-07-18 | 2014-11-26 | 奉化市宇创产品设计有限公司 | Piezoelectric ceramics light modulator |
-
2014
- 2014-07-18 CN CN201410353412.3A patent/CN104155751A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005173255A (en) * | 2003-12-11 | 2005-06-30 | Hitachi Maxell Ltd | Variable light attenuator |
| CN1844993A (en) * | 2006-02-17 | 2006-10-11 | 中国科学院上海光学精密机械研究所 | Amplitude Modulation Effect Compensation Device |
| CN203965727U (en) * | 2014-07-18 | 2014-11-26 | 奉化市宇创产品设计有限公司 | Piezoelectric ceramics light modulator |
Non-Patent Citations (3)
| Title |
|---|
| 刘勇等: "压电陶瓷光纤相位调制控制系统的研制", 《量子电子学报》 * |
| 张超等: "光纤压电陶瓷相位调制系统及其在线标定", 《光电工程》 * |
| 易迎彦等: "压电陶瓷压电特性的激光调制法测量研究", 《应用光学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115542533A (en) * | 2022-09-16 | 2022-12-30 | 中国人民解放军国防科技大学 | Modulation control integrated piezoelectric ceramic phase modulator |
| CN115542533B (en) * | 2022-09-16 | 2024-07-12 | 中国人民解放军国防科技大学 | Modulation control integrated piezoelectric ceramic phase modulator |
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Application publication date: 20141119 |