CN104600548A - Lithium niobate modulator polarization property based high-stability frequency doubling photoelectric oscillator - Google Patents
Lithium niobate modulator polarization property based high-stability frequency doubling photoelectric oscillator Download PDFInfo
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- CN104600548A CN104600548A CN201510032842.XA CN201510032842A CN104600548A CN 104600548 A CN104600548 A CN 104600548A CN 201510032842 A CN201510032842 A CN 201510032842A CN 104600548 A CN104600548 A CN 104600548A
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- lithium niobate
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Abstract
A lithium niobate modulator polarization property based high-stability frequency doubling photoelectric oscillator comprises a semiconductor laser source, a light polarization rotation device, a lithium niobate Mach-zehnder optical modulator, a polarization-maintaining light coupler, a second polarizer, a single-mode optical fiber, a second photoelectric detector, a microwave amplifier, a narrow-band filter and an electric beam splitter which are connected sequentially and cyclically, wherein the lithium niobate Mach-zehnder optical modulator is furtehr connected with a first polarizer and a first photoelectric detector respectively. The problems of high complexity and low stability of a traditional frequency multiplication oscillator can be solved.
Description
Technical field
The invention belongs to microwave photonics field, is a kind of high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic in particular.
Background technology
Optical-electronic oscillator be a kind of can at the microwave oscillator of microwave and millimeter wave band operation.Compared with traditional microwave oscillator, the microwave signal that such oscillator exports has extremely low phase noise.Therefore, among the radio frequency photon systems such as it is widely used in as distributed radar, optical communication transmission.For typical optical-electronic oscillator, the microwave signal of higher frequency exports often to be limited in its oscillation rings and comprises modulator, microwave amplifier, arrowband electrical filter, the operation bandwidth of multiple opto-electronic device such as photodetector.In order under the prerequisite do not raised the cost, improve the running frequency of optical-electronic oscillator, a series of frequency multiplication photoelectric oscillator is suggested and proves.This kind of frequency-multiplication oscillator not only increases Clock Extraction and the modulation format conversion that running frequency also can be applicable to optical communication.But because the extra photoelectron element of too much introducing is in oscillation rings, the drift of the frequency multiplication photoelectric oscillator of having reported for work to polarization state and polarization voltage is very responsive, and stability is had a greatly reduced quality.Therefore, frequency multiplication photoelectric oscillator job stability improves and mechanical complications reduces, and is that it plays the prerequisite of huge applications potentiality.
In sum, in order to solve the above-mentioned technical bottleneck faced, at present in the urgent need to one to the insensitive high stable frequency multiplication photoelectric oscillator of polarimeter bias voltage.
Summary of the invention
The object of the invention is to, provide a kind of high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic, it can solve the problem that traditional frequency multiplication photoelectric oscillator complexity is high, stability is low.
The invention provides a kind of high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic, comprising:
Semiconductor LASER Light Source;
One light polarization circulator, its one end is connected with the output of semiconductor laser light resource;
One lithium niobate mach zhender electrooptic modulator, its light input end mouth 1 is connected with the other end of light polarization circulator;
One protects polarisation coupler, and its port one is connected with the optical output port 2 of lithium niobate mach zhender electrooptic modulator;
One first polarizer, its input is connected with the port 3 protecting polarisation coupler;
One first photodetector, the output of its light input end mouth 1 and first polarizer connects, and the another port 2 of this first photodetector is electric output;
One second polarizer, its input is connected with the port 2 protecting polarisation coupler;
One monomode fiber, its one end is connected with the output of second polarizer;
One second photodetector, its light input end mouth 1 is connected with the other end of monomode fiber;
One microwave amplifier, its input is connected with the electric output port 2 of the second photodetector;
One narrow band filter, its input is connected with the output of microwave amplifier;
One electric beam splitter, its input port 1 is connected with the output of narrow band filter, and its output port 2 is connected with the electrical input mouth 3 of lithium niobate mach zhender electrooptic modulator, and the port 3 of this electric beam splitter is the microwave delivery outlet of this optical-electronic oscillator.
As can be seen from technique scheme, the present invention has following beneficial effect:
The problem of existing optical-electronic oscillator high complexity and low stability should can be solved based on the frequency multiplication photoelectric oscillator of lithium niobate modulator polarization characteristic.
Accompanying drawing explanation
In order to further illustrate structure of the present invention and feature, below in conjunction with example and accompanying drawing, the present invention is described further, wherein:
Fig. 1 is the high stable frequency multiplication photoelectric oscillator structural representation based on lithium niobate modulator polarization characteristic.
Embodiment
Refer to shown in Fig. 1, the invention provides a kind of high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic, comprising:
Semiconductor LASER Light Source a, for providing laser beam, the frequency of this light beam is v0;
One light polarization circulator b, its one end is connected with the output of semiconductor laser light resource a;
One lithium niobate mach zhender electrooptic modulator c, its light input end mouth 1 is connected with the other end of light polarization circulator b, light polarization circulator b, for controlling the polarization direction of the laser exported by semiconductor laser light resource a, makes the X-axle in the polarization direction of laser and lithium niobate mach zhender electrooptic modulator c end face at 45 °; This laser is projected as X-axle light component X-is axial, with X-axle direction in 90 ° is projected as Y-axle light component; The bias voltage of this lithium niobate mach zhender electrooptic modulator c is placed in transmission smallest point; Due to the polarization dependent behavior of lithium niobate mach zhender electrooptic modulator, the microwave signal that X-axle light component is F by the frequency that the electric input port 3 by lithium niobate mach zhender electrooptic modulator c enters is modulated, Y-axle light component then can not be modulated by this microwave signal, therefore exist, comprise two light frequency composition: v by the X-axle light component of the laser beam of the output of the light output mouth 2 of mach zhender electrooptic modulator c
0+ F, and v
0-F, Y-axle light component only comprises light frequency composition a: v
0;
One protects polarisation coupler d, and its port one is connected with the light output mouth 2 of lithium niobate mach zhender electrooptic modulator c, and laser is divided into two bundles by it, and light beam one exports from the port 2 protecting polarisation coupler d, and light beam two exports from the port 3 protecting polarisation coupler;
One first polarizer e, output is connected with the port 3 protecting polarisation coupler d; And the main shaft of this first polarizer e aligns with the slow axis protecting polarisation coupler d, and to guarantee the X-axle light component leached in light beam one, its light frequency composition comprises v
0+ F, and v
0-F;
One first photodetector f, its optical input 1 is connected with the output of the first polarizer e, and for accepting the X-axle light component in light beam one, its electric delivery outlet 2 is for exporting the microwave signal of frequency multiplication, and the frequency of this microwave signal is 2F, for application;
One second polarizer g, its input is connected with the port 2 protecting polarisation coupler d, and the main shaft of this second polarizer e is 45 ° with the slow axis angle protecting polarisation coupler d, with guarantee to leach the X-axle light component of the half in light beam two and the Y-axis light component of half, its light frequency composition comprises v
0+ F, v
0and v
0-F;
One monomode fiber h, its one end is connected with the output of the second polarizer g, stores and modeling the light energy of light beam two for realizing;
One second photodetector i, its light input end mouth 1 is connected with the other end of monomode fiber h, and for light beam two is converted to microwave signal, the frequency content of the microwave signal of conversion comprises: F and 2F;
One microwave amplifier j, its input is connected the microwave signal for amplifying conversion with the electric output port 2 of the second photodetector i;
One narrow band filter k, its input is connected with the output of microwave amplifier j, for leaching the microwave composition that the microwave signal medium frequency changed is F;
One electric beam splitter 1, its input port 1 is connected with the output of narrow band filter k, and output port 2 is connected with the electrical input mouth 3 of lithium niobate mach zhender electrooptic modulator c; For being that the microwave composition of F is divided into two bundles, microwave beam one and microwave beam two by frequency; Microwave beam one exports the laser beam for modulating through lithium niobate mach zhender electrooptic modulator c from the output port 2 of electric beam splitter 1, and microwave beam two exports, for application from the output port 3 of electric beam splitter 1.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect have been described in detail; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1., based on a high stable frequency multiplication photoelectric oscillator for lithium niobate modulator polarization characteristic, comprising:
Semiconductor LASER Light Source;
One light polarization circulator, its one end is connected with the output of semiconductor laser light resource;
One lithium niobate mach zhender electrooptic modulator, its light input end mouth 1 is connected with the other end of light polarization circulator;
One protects polarisation coupler, and its port one is connected with the optical output port 2 of lithium niobate mach zhender electrooptic modulator;
One first polarizer, its input is connected with the port 3 protecting polarisation coupler;
One first photodetector, the output of its light input end mouth 1 and first polarizer connects, and the another port 2 of this first photodetector is electric output;
One second polarizer, its input is connected with the port 2 protecting polarisation coupler;
One monomode fiber, its one end is connected with the output of second polarizer;
One second photodetector, its light input end mouth 1 is connected with the other end of monomode fiber;
One microwave amplifier, its input is connected with the electric output port 2 of the second photodetector;
One narrow band filter, its input is connected with the output of microwave amplifier;
One electric beam splitter, its input port 1 is connected with the output of narrow band filter, and its output port 2 is connected with the electrical input mouth 3 of lithium niobate mach zhender electrooptic modulator, and the port 3 of this electric beam splitter is the microwave delivery outlet of this optical-electronic oscillator.
2. the high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic according to claim 1, wherein light polarization circulator is for controlling the polarization direction of the laser exported by semiconductor laser light resource, makes the X-axle in the polarization direction of laser and lithium niobate mach zhender electrooptic modulator end face at 45 °.
3. the high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic according to claim 1, wherein the bias voltage of lithium niobate mach zhender electrooptic modulator is placed in transmission smallest point.
4. the high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic according to claim 1, wherein the main shaft of first polarizer aligns with the slow axis protecting polarisation coupler.
5. the high stable frequency multiplication photoelectric oscillator based on lithium niobate modulator polarization characteristic according to claim 1, wherein the main shaft of second polarizer is 45 ° with the slow axis angle of guarantor's polarisation coupler.
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| CN201510032842.XA CN104600548A (en) | 2015-01-22 | 2015-01-22 | Lithium niobate modulator polarization property based high-stability frequency doubling photoelectric oscillator |
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| CN201510032842.XA CN104600548A (en) | 2015-01-22 | 2015-01-22 | Lithium niobate modulator polarization property based high-stability frequency doubling photoelectric oscillator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374324A (en) * | 2016-11-28 | 2017-02-01 | 中国科学院半导体研究所 | Tunable frequency-doubled photoelectric oscillator system based on polarization modulator |
| CN106643522A (en) * | 2016-12-28 | 2017-05-10 | 西南交通大学 | Optical-fiber low-coherence interference displacement demodulation device and method based on photoelectric oscillator |
| CN106840609A (en) * | 2017-01-03 | 2017-06-13 | 濮阳光电产业技术研究院 | A kind of optical maser wavelength automatic calibration system based on optoelectronic oscillation |
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| CN102163795A (en) * | 2011-03-15 | 2011-08-24 | 中国科学院半导体研究所 | Optoelectronic oscillator with tunable broadband frequency |
| CN102403644A (en) * | 2011-06-30 | 2012-04-04 | 南京航空航天大学 | Photonic high order frequency doubling optoelectronic oscillator |
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2015
- 2015-01-22 CN CN201510032842.XA patent/CN104600548A/en active Pending
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| CN102163795A (en) * | 2011-03-15 | 2011-08-24 | 中国科学院半导体研究所 | Optoelectronic oscillator with tunable broadband frequency |
| CN102403644A (en) * | 2011-06-30 | 2012-04-04 | 南京航空航天大学 | Photonic high order frequency doubling optoelectronic oscillator |
Non-Patent Citations (2)
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| JIANYU ZHENG等: "Photonic microwave-signal-mixing technique using phase-coherent orthogonal optical carriers for radio-over-fiber application", 《OPTICS LETTERS》 * |
| TAKAHIDE SAKAMOTO等: "Optoelectronic oscillator using push-pull Mach-Zehnder modulator biased at null point for optical two-tone signal generation", 《2005 CONFERENCE ON LASERS & ELECTRO-OPTICS(CLEO)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374324A (en) * | 2016-11-28 | 2017-02-01 | 中国科学院半导体研究所 | Tunable frequency-doubled photoelectric oscillator system based on polarization modulator |
| CN106643522A (en) * | 2016-12-28 | 2017-05-10 | 西南交通大学 | Optical-fiber low-coherence interference displacement demodulation device and method based on photoelectric oscillator |
| CN106840609A (en) * | 2017-01-03 | 2017-06-13 | 濮阳光电产业技术研究院 | A kind of optical maser wavelength automatic calibration system based on optoelectronic oscillation |
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Application publication date: 20150506 |