CN202206028U - Broadband optical chaos signal source chip structure based on annular laser - Google Patents
Broadband optical chaos signal source chip structure based on annular laser Download PDFInfo
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- CN202206028U CN202206028U CN2011202385918U CN201120238591U CN202206028U CN 202206028 U CN202206028 U CN 202206028U CN 2011202385918 U CN2011202385918 U CN 2011202385918U CN 201120238591 U CN201120238591 U CN 201120238591U CN 202206028 U CN202206028 U CN 202206028U
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Abstract
The utility model discloses a broadband optical chaos signal source chip structure based on an annular laser, which comprises an annular laser. The annular laser comprises a waveguide resonant cavity, an input waveguide and an output waveguide, wherein the input waveguide and the output waveguide are respectively coupled with the waveguide resonant cavity. The input section of the input waveguide and the output section of the output waveguide are positioned on the same side of the waveguide resonant cavity. The input waveguide comprises an input section, a prolonged section and a coupling section. The output waveguide comprises a prolonged section, a coupling section and an output section. The broadband optical chaos signal source chip structure based on an annular laser is characterized in that the annular laser also comprises an arc-shaped feedback waveguide which is positioned on the other side of the waveguide resonant cavity and coupled with the waveguide resonant cavity; the arc-shaped feedback waveguide comprises a coupling input section and a coupling output section, both of which are coupled with the waveguide resonant cavity; and the chip structure also comprises a single mode DFB laser that is connected with the input section of the input waveguide. The beneficial effects of the utility model reside in that the broadband optical chaos signal source chip structure has the advantages of low cost, small size, low power consumption, high integrated level or the like.
Description
Technical field
The utility model belongs to the optical communication technique field, relates in particular to the optical integrated chip technical field that chaotic signal produces in the security photo-communication technical field.
Background technology
Along with the continuous development of information technology, particularly in fields such as finance, commerce, the confidentiality demand of communication is increasingly high, and information encryption also receives increasing concern.Traditional software encryption technique is based on the complexity of algorithm and the length of key, and the security performance of this method reduces along with the increase of amount of information, and because AES need consume the regular hour, enciphering rate is severely limited.Along with quantum-mechanical development, the quantum cryptography technology becomes the new lover of software cryptography, but this encryption method is to adopt the characteristic of light quantum that key is transmitted, and therefore the security performance to Global Information descends to some extent.Along with the increase to the demand of the secure communication of big capacity and two-forty, above encryption technology can not satisfy people's demand.After the sixties in 20th century, chaos phenomenon came to light, the communication mode of encoding at physical layer utilization chaotic carrier had improved the security performance and the enciphering rate of communication system greatly, becomes the new selection of information encryption.The optical chaos signal has randomlikeness, to the sensitive dependence of initial condition and the characteristics such as broadband power spectrum density of similar noise, make it be particularly suitable for security photo-communication.At present, the application of optical chaos signal in security photo-communication become of paramount importance in using, one of the most promising application of chaos.In addition, the autocorrelator trace of optical chaos signal has and is similar to the linear of δ function, and this characteristic makes chaotic signal also be widely used in the range laser radar system.At present, correlative study is all carried out in generation and application to the optical chaos signal in countries in the world.
The optical chaos signal by its producing method can be divided into generally that light beam is gone into, light feedback and three kinds of modes of electro-optical feedback.Exterior light is injected chaos system is meant increases a suitable intensity, appropriate frequency on laser outside injection light; Thereby make the injection light of CF and certain strength and the interaction of laser cavity inner laser field make laser works, produce chaotic signal at chaos state.The light feedback is meant at laser outside; Make the part of output light of laser turn back in the original laser through placing reflection device through behind the reflection device; Through regulating the feedback light intensity; Make the laser works of the feedback light disturbance receive certain intensity at chaos state, produce chaotic signal.Electro-optical feedback is meant and converts the part of the output light of laser to the signal of telecommunication, is superimposed through the bias current that amplifies time-delay back and laser and controls laser generation chaotic signal.Yet; More than the bandwidth of the optical chaos signal that produces of three kinds of modes narrower; And the transmission rate of signal and transmission capacity depend on the bandwidth as the optical chaos signal of carrier wave in the chaotic secret optical communication. therefore, the bandwidth that improves the optical chaos signal is the only way of realizing the secure communication of high speed chaotic laser light.
At present, occurred the mode of multiple generation broadband chaotic signal both at home and abroad, the most generally gone into the mode that dual mode combines, and produced the optical chaos signal of broader bandwidth based on light feedback and light beam.Wherein, the Distributed Feedback Laser that the most commonly utilizes two separation is respectively as master and slave laser.A kind of is outside main Distributed Feedback Laser chamber, to set up a speculum; The output light of main Distributed Feedback Laser is used the light-splitting device separated into two parts; Part light gets in the main Distributed Feedback Laser as feedback light after mirror reflects again; Be injected into from Distributed Feedback Laser after the adjustment of another part light through optics such as isolator, attenuators, make from Distributed Feedback Laser and be operated in chaos state, output broadband chaotic signal; Another kind is outside laser chamber, to set up a speculum; The light of the main Distributed Feedback Laser output of freely turning round is gone into to carrying out light beam from Distributed Feedback Laser after the adjustment of optics such as isolator and attenuator; Simultaneously; Through beam splitting device separated into two parts, a part of light gets into from Distributed Feedback Laser as feedback light through chamber external mirror reflection back again from the light of Distributed Feedback Laser output, and another part light is as exporting signal.This dual mode can both produce the optical chaos signal of broader bandwidth, but is made up of the therefore existing system configuration complicacy that is used to produce chaotic signal, poor stability, cost height a plurality of independent optics owing to produce the system of chaotic signal.
The utility model content
The purpose of the utility model is the deficiency that overcomes prior art, and a kind of broadband light chaos signal source chip structure based on ring laser is provided.
The technical scheme of the utility model is: based on the broadband light chaos signal source chip structure of ring laser; Comprise a ring laser; Said ring laser comprise a waveguide resonant cavity and respectively with one section input waveguide and one section output waveguide of waveguide resonant cavity coupling; The input section of said input waveguide and the deferent segment of output waveguide are positioned at the same side of waveguide resonant cavity; Said input waveguide comprises input section, extension and coupled section, and said output waveguide comprises extension, coupled section and deferent segment, it is characterized in that; Said ring laser also comprise one section be positioned at the waveguide resonant cavity opposite side and with the arc feedback waveguide of waveguide resonant cavity coupling, the waveguide of said arc feedback comprises respectively the coupling input section and coupling deferent segment that is of coupled connections with waveguide resonant cavity; Said chip structure also comprises a single mode Distributed Feedback Laser that is connected input waveguide input section.
The extension of above-mentioned input waveguide, the extension of output waveguide also form one with self idle end in a certain angle, said idle end is in order to avoid the light reflection interference to normal light.
Above-mentioned idle end and input waveguide are 5-10 degree angle.
The waveguide resonant cavity of above-mentioned ring laser is racetrack, annular, polygon or dish.
The beneficial effect of the utility model is: the source chip structure of the utility model is used to replace the existing system that is used to produce chaotic signal; Because counterclockwise the light of transmission is separated into two-way light in the coupling input section of arc feedback waveguide and transmits in waveguide resonant cavity; Converging once more at the coupling deferent segment is one road light; Because the path-length of two ways of separated light is inconsistent; Therefore the light that transmits in respect to waveguide resonant cavity of the transmission light in the waveguide of arc feedback has the regular hour to postpone; Thereby formed feedback light, the feedback light of the therefore certain off-resonance frequency and the injection light of intensity, certain intensity and interact the light three of waveguide resonant cavity transmission counterclockwise and to make ring laser be operated in chaos state, thus export chaotic signal.And this chip structure organically integrates ring laser with being used for the Distributed Feedback Laser that light beam goes into, and has many advantages such as low cost, small size, low-power consumption and high integration.And in this programme, a plurality of functional units connect through waveguide, have effectively reduced loss, can produce high-quality broadband light chaotic signal.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Description of reference numerals: ring laser 1; Waveguide resonant cavity 11; Input waveguide 12; The input section 121 of input waveguide; The extension 122 of input waveguide; The coupled section 123 of input waveguide; The idle end 124 of input waveguide; Output waveguide 13; The extension 132 of output waveguide; The deferent segment 131 of output waveguide; The coupled section 133 of output waveguide; The idle end 134 of output waveguide; The waveguide 14 of arc feedback; The coupling input section 141 of arc feedback waveguide; The coupling deferent segment 142 of arc feedback waveguide; Single mode Distributed Feedback Laser 2; Electrode 3.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment the utility model is done further explanation.
As shown in Figure 1; The broadband light chaos signal source chip structure based on ring laser of present embodiment; Comprise a ring laser 1, ring laser 1 comprise a waveguide resonant cavity 11 and respectively with one section input waveguide 12 and one section output waveguide 13 of waveguide resonant cavity 11 coupling.Input waveguide 12 according to it with respect to the position of waveguide resonant cavity 11 and the main transmission direction of light; By the people is input section 121, extension 122 and the coupled section 123 that is set at this input waveguide; Input section 121 and extension 122 lay respectively at the both ends of whole input waveguide 12; Coupled section 123 is positioned at the middle part; Input section 121 is injection ports of ring laser 1 exterior light; Input section 121 is positioned at an end of whole input waveguide 12 and is positioned at a side of waveguide resonant cavity 11, and coupled section 123 is used for the optical coupling of transmitting at input waveguide is got in the waveguide resonant cavity 11, so coupled section 123 is positioned at the middle part of whole input waveguide 12 and tangent with waveguide resonant cavity 11 haply; Extension 122 is used for blazing abroad through the light that coupled section 123 gets into waveguide resonant cavity 11 injecting from input section 121 and failing; But when the end face of extension 122 is vertical with light, still have few part parallel light in incident light reflected back input section 121, to go, just easily the light of normal transmission is produced some non-essential interference.Same; Output waveguide 13 according to its with respect to the main transmission direction of the position of waveguide resonant cavity 11 and light also by artificial extension 132, deferent segment 131 and the coupled section 133 of having set this output waveguide; Extension 132 and deferent segment 131 lay respectively at the both ends of whole output waveguide 12; Coupled section 133 is positioned at the middle part; Deferent segment 131 is output ports of ring laser 1 interior lights; Deferent segment 131 is positioned at an end of whole output waveguide 13 and is positioned at a side of waveguide resonant cavity 11, and coupled section 133 is used for the optical coupling in waveguide resonant cavity 11 transmission is got in the output waveguide 13, so this coupled section 133 is positioned at the middle part of whole output waveguide 13 and tangent with waveguide resonant cavity 11 haply; The input section 121 of input waveguide 12 and the deferent segment 131 of output waveguide 13 are positioned at the same side of waveguide resonant cavity 11.Said ring laser 1 also comprise one section be positioned at waveguide resonant cavity 11 opposite sides and with the arc feedback waveguide 14 of waveguide resonant cavity 11 coupling, the waveguide 14 of said arc feedback comprises respectively the coupling input section 141 and coupling deferent segment 142 that is of coupled connections with waveguide resonant cavity 11.Simultaneously; This chip structure also comprises a single mode Distributed Feedback Laser 2 that is connected the input section 121 of input waveguide 12; The input section 121 of single mode Distributed Feedback Laser 2 and input waveguide 12 has constituted light beam and has gone into passage; 14 of waveguides of arc feedback have constituted the light feedback path, and input waveguide 12 has constituted the light input channel with waveguide resonant cavity 11, and output waveguide 13 has constituted the light output channel with waveguide resonant cavity 11.Because counterclockwise the light of transmission is separated into two-way light in the coupling input section 141 of arc feedback waveguide 14 and transmits in waveguide resonant cavity 11; Converging once more at coupling deferent segment 142 is one road light; Because the path-length of two ways of separated light is inconsistent; Therefore the light transmission time in the waveguide 14 of arc feedback postpones to form a feedback light; The feedback light of the therefore certain off-resonance frequency and the injection light of intensity, certain intensity and interact the light three of waveguide resonant cavity 11 transmission counterclockwise and to make ring laser 1 be operated in chaos state, thus chaotic signal exported.
The coupled section 123 of the input waveguide 12 of such scheme and coupled section 133 places of output waveguide 13 also are provided with electrode 3; Illustrate among Fig. 1; On single mode Distributed Feedback Laser 2 and waveguide resonant cavity 11, also be provided with electrode in addition; Not shown among Fig. 1; The effect of these electrodes is on electrode, to add different bias currents in order to control with regulate input and output frequency, coupling ratio and the transmission direction of laser and since in the utility model various electrodes the common practise of being looked those skilled in the art is set, so the detailed distribution situation of various electrodes is not described in the present embodiment; Electrode tended to produce known effect according to known mode when but each parts that it will be appreciated by those of ordinary skill in the art that the chip structure of present embodiment were worked.
According to above-mentioned disclosed structure; We know; If extension 122,132 its end faces of above-mentioned input waveguide 12 and output waveguide 13 are during perpendicular to waveguide; Light after the reflection tend to input waveguide 12 and output waveguide in the parallel light of normal transmission, the light after the reflection is just easily to some non-essential interference of light generation of normal transmission like this, and these interference to be us hope to get rid of.Therefore we can also on the extension 122,132 of above-mentioned input waveguide 12 and output waveguide 13, also form respectively one with input waveguide 12 and output waveguide 13 idle end 124,134 in a certain angle; Said idle end 124,134 in order to the reverberation of avoiding input waveguide 12 to the interference of the reverberation that injects light and output waveguide 13 to output light; The optimum angular range of angle of idle end 124,134 and input waveguide 12 and output waveguide 13 is to be 5-10 degree angle; Other angle also can, but effect can be poor.
The waveguide resonant cavity 11 of the ring laser 1 of such scheme is racetrack, annular, polygon or dish.Input waveguide 12 is ridge waveguides with output waveguide 13; Its effect is to be used for coupled optical power input and output waveguide resonant cavity 11; Input waveguide 12, output waveguide 13 directly are coupled with waveguide resonant cavity 11 edges; The position general tangential, and, regulate the power that injects light and feedback light with this by electrode 3 control coupling ratios.After ring laser powered up, regulating bias current, ring laser is produced with counter clockwise direction was the luminous state of leading of twocouese, and the change of the optical wavelength of output can realize through the bias current that fine setting is added in electrode.
The single mode DBF laser of such scheme is by electrode drive, and regulates its output light wavelength thus.
The work engineering of such scheme is roughly following: referring among Fig. 1 shown in the dotted portion; Bias current through fine setting Distributed Feedback Laser 2; Can regulate Distributed Feedback Laser 2 output light wavelengths, thus the frequency difference that can regulate the output light of the ring laser 1 that injects light and freely turn round, i.e. off-resonance frequency.The light of Distributed Feedback Laser 2 outputs is injected into input waveguide 12; Most of light counterclockwise is injected in the waveguide resonant cavity 11 of ring laser 1 through coupling again; Simultaneously; The waveguide resonant cavity 11 of ring laser 1 can be in unidirection luminous state under the effect of bias current, i.e. the light of transmission counterclockwise, and counterclockwise the light of transmission is separated into two-way light in the coupling input section 141 of arc feedback waveguide 14 and transmits; Converging once more at coupling deferent segment 142 is one road light; Because the path-length of two ways of separated light is inconsistent, therefore the light that transmits in respect to waveguide resonant cavity of the transmission light in the waveguide 14 of arc feedback has the regular hour to postpone, thereby has formed feedback light; The feedback light of the therefore certain off-resonance frequency and the injection light of intensity, certain intensity and interact the light three of waveguide resonant cavity 11 transmission counterclockwise and to make ring laser 1 be operated in chaos state, thus chaotic signal exported.During the chip structure operate as normal of the utility model, promptly constantly repeat said process.
The power of the feedback light of the injection light of Distributed Feedback Laser 2 and the waveguide of arc feedback can be regulated through the electrode of coupled section; Under the nonlinear interaction of the laser field that the waveguide resonant cavity 11 of the injection light with certain off-resonance frequency, certain power and feedback light and ring laser 1 produces, make ring laser 1 be operated in chaos state output broadband chaotic signal; And the off-resonance frequency and injection light, feedback light power of light are injected in adjusting, can make the bandwidth maximum of the chaotic signal of ring laser output.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help the principle of reader understanding's the utility model, should to be understood that the protection range of the utility model is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from the utility model essence according to disclosed these teachings of the utility model, and these distortion and combination are still in the protection range of the utility model.
Claims (4)
1. based on the broadband light chaos signal source chip structure of ring laser; Comprise a ring laser; Said ring laser comprise a waveguide resonant cavity and respectively with one section input waveguide and one section output waveguide of waveguide resonant cavity coupling; The input section of said input waveguide and the deferent segment of output waveguide are positioned at the same side of waveguide resonant cavity; Said input waveguide comprises input section, extension and coupled section, and said output waveguide comprises extension, coupled section and deferent segment, it is characterized in that; Said ring laser also comprise one section be positioned at the waveguide resonant cavity opposite side and with the arc feedback waveguide of waveguide resonant cavity coupling, the waveguide of said arc feedback comprises respectively the coupling input section and coupling deferent segment that is of coupled connections with waveguide resonant cavity; Said chip structure also comprises a single mode Distributed Feedback Laser that is connected input waveguide input section.
2. the broadband light chaos signal source chip structure based on ring laser according to claim 1 is characterized in that, the extension of said input waveguide, the extension of output waveguide also form one with self idle end in a certain angle.
3. the broadband light chaos signal source chip structure based on ring laser according to claim 2 is characterized in that said idle end and input waveguide are 5-10 degree angle.
4. the broadband light chaos signal source chip structure based on ring laser according to claim 1 is characterized in that the waveguide resonant cavity of described ring laser is annular, polygon or dish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202385918U CN202206028U (en) | 2011-07-07 | 2011-07-07 | Broadband optical chaos signal source chip structure based on annular laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202385918U CN202206028U (en) | 2011-07-07 | 2011-07-07 | Broadband optical chaos signal source chip structure based on annular laser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280814A (en) * | 2011-07-07 | 2011-12-14 | 电子科技大学 | Wideband optical chaotic signal source chip structure based on annular laser |
| CN103490277A (en) * | 2013-09-23 | 2014-01-01 | 电子科技大学 | Tunable semiconductor ring laser |
| CN103490279A (en) * | 2013-09-23 | 2014-01-01 | 电子科技大学 | Tunable semiconductor ring laser with built-in gratings |
| CN104238009A (en) * | 2014-09-12 | 2014-12-24 | 北京大学 | Method for achieving optical isolation though nonreciprocity of mode coupling and optical isolator |
-
2011
- 2011-07-07 CN CN2011202385918U patent/CN202206028U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280814A (en) * | 2011-07-07 | 2011-12-14 | 电子科技大学 | Wideband optical chaotic signal source chip structure based on annular laser |
| CN102280814B (en) * | 2011-07-07 | 2013-06-12 | 电子科技大学 | Wideband optical chaotic signal source chip structure based on annular laser |
| CN103490277A (en) * | 2013-09-23 | 2014-01-01 | 电子科技大学 | Tunable semiconductor ring laser |
| CN103490279A (en) * | 2013-09-23 | 2014-01-01 | 电子科技大学 | Tunable semiconductor ring laser with built-in gratings |
| CN104238009A (en) * | 2014-09-12 | 2014-12-24 | 北京大学 | Method for achieving optical isolation though nonreciprocity of mode coupling and optical isolator |
| CN104238009B (en) * | 2014-09-12 | 2017-07-18 | 北京大学 | The nonreciprocity of Land use models coupling realizes optically isolated method and optoisolator |
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