CN101299650B - Apparatus for converting double channel wavelength based on mode splitting silicon based micro-ring - Google Patents
Apparatus for converting double channel wavelength based on mode splitting silicon based micro-ring Download PDFInfo
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- CN101299650B CN101299650B CN200810039559XA CN200810039559A CN101299650B CN 101299650 B CN101299650 B CN 101299650B CN 200810039559X A CN200810039559X A CN 200810039559XA CN 200810039559 A CN200810039559 A CN 200810039559A CN 101299650 B CN101299650 B CN 101299650B
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Abstract
A binary channel wavelength conversion apparatus based on mode abruption silicon based micro-ring pertains to the fiber communication technique field. The invention includes a detecting signal generating device, a pump signal generating device, a silicon based micro-ring resonance system and a binary channel wavelength conversion measuring system, wherein, the output of the detecting signal generating device and the pump signal generating device are simultaneously connected to the input of the silicon based micro-ring resonance system, the output of the silicon based micro-ring resonance system is connected to the input of the binary channel wavelength conversion measuring system. The micro-ring resonance system includes a silicon based micro-ring, a direct wave-guide, a second coupler, a power divider and a power monitoring apparatus, wherein, the distance between the silicon based micro-ring and the direct wave-guide is from tens of nanometers to hundreds of nanometers, the output of the silicon based ring shaped resonant cavity is divided into two parts by the power divider, the larger power output is connected to the wavelength conversion measuring systems, while the smaller power output is connected to the power monitoring apparatus. The inventive apparatus has advantages of small volume, simple structure; and is apt to integrate in large scale.
Description
Technical field
The present invention relates to a kind of Wavelength converter of technical field of optical fiber communication, specifically is a kind of device of the binary channels wavelength Conversion based on the mode abruption silicon-based micro ring.
Background technology
Cross and the node section of branch at the wavelength-division multiplex system network, have identical receiver address, that is to say that the light signal of identical wavelength might produce " conflict ".For avoiding this conflict, needing wherein, a kind of wavelength Conversion of light signal becomes on another wavelength.The binary channels wavelength Conversion is a key technology of full optical switching network, and it is transformed into two other different passage with the data message of a passage.Especially, adopt that binary channels wavelength Conversion technology can be applied in the integrated optical circuit on the sheet of micro-nano waveguiding structure.The silicon on insulated substrate technology of rising in recent years provides a good platform for integrated optoelectronic device, and the manufacture craft of this structure and CMOS integrated circuit technology are compatible fully, and the component compact of making is of a size of submicron order.Therefore the device that is designed for full light signal processing capacity on integrated silicon on insulated substrate is a recent research focus.
Existing binary channels wavelength Conversion concentrates on and utilizes the semiconductor optical amplifier material, but does not see the binary channels wavelength Conversion based on the mode abruption silicon-based micro ring as yet.
Find through literature search prior art, " the All-opticalmulti-wavelength conversion of 10Gbit/s NRZ/RZ signals based on SOA-MZIfor WDM multicasting " that H.S.Chung etc. delivered on the 41st phase 432-433 page or leaf at " Electronics Letters " (" electronics wall bulletin ") in 2005 (being used for based semiconductor amplifier-Mach full light multi-channel wavelength conversion of the 10Gbit/s non-return-to-zero of the moral structure/data that make zero once of wavelength-division multiplex system), propose in this article to utilize semiconductor optical amplifier to carry out the binary channels wavelength Conversion, its principle is the cross-phase modulation, be specially: earlier multi beam is surveyed light and be divided into two bundle coherent lights, pump light utilizes cross-phase modulation to a branch of modulation the wherein, this bundle light phase is changed with pump light, it is relevant to utilize interferometer that two-beam is taken place then, interference light intensity is realized multi-channel wavelength conversion purpose with phase change thereby reach.Its deficiency is that the semiconductor optical amplifier size generally has a millimeter magnitude.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of device of the binary channels wavelength Conversion based on the mode abruption silicon-based micro ring is proposed, the charge carrier nonlinear effect that this technology utilization has in the silicon-based micro ring resonator of mode abruption realizes the binary channels wavelength Conversion, strong pump signal and the weak detectable signal of two bundles are injected resonant cavity, and two beam detection signals lay respectively at two resonance locations with mode abruption.Pump signal produces free carrier by the two photon absorption effect, the charge carrier that produces will cause refractive index to change by the charge carrier effect of dispersion, thereby resonance peak is moved toward high frequency direction, am signals is transformed into two bundles to be surveyed on the light, thereby realize twin-channel wavelength Conversion, it is little, simple in structure that this device has a volume, is easy to extensive integrated advantage.The size that the present invention is based on silicon-based micro ring then is micron dimension.
The present invention is achieved by the following technical solutions:
The present invention includes: detection signal generator, pump signal generator, silicon-based micro ring resonator system, binary channels wavelength Conversion measuring system.The output of detection signal generator and pump signal generator links to each other with the input of silicon-based micro ring resonator system simultaneously, and the output of silicon-based micro ring resonator system links to each other with the input of binary channels wavelength Conversion measuring system.
Described detection signal generator, comprise first tunable laser, second tunable laser, first Polarization Controller, second Polarization Controller, first coupler, first image intensifer, wherein first tunable laser and second tunable laser all produce continuous laser, corresponding respectively two resonance peaks of wavelength with mode abruption, the output of first tunable laser links to each other with the input of first Polarization Controller, the output of second tunable laser links to each other with the input of second Polarization Controller, first Polarization Controller and second Polarization Controller are controlled the polarization state of two beam detection signals that enter waveguide respectively, the output of two Polarization Controllers links to each other with the input of first coupler, and the output of first coupler links to each other with the input of first image intensifer.
Described pump signal generator comprises the 3rd tunable laser, electric signal generator, electrooptic modulator, second image intensifer, the 3rd Polarization Controller.Wherein: the 3rd tunable laser produces continuous laser, another one resonance location in the corresponding ring resonator of wavelength, its output port links to each other with the input port of electrooptic modulator, the electric signal generator output port links to each other with the electric signal input end mouth of electrooptic modulator, electrooptic modulator is responsible for the signal of telecommunication is modulated on the light, produce the light signal of non-return-to-zero form, and with second image intensifer light signal is amplified with as pump light, the output of second image intensifer links to each other with the input of the 3rd Polarization Controller.
Described silicon-based micro ring resonator system comprises silicon-based micro ring, straight wave guide, second coupler, power splitter, power monitor.The output of first image intensifer and the 3rd Polarization Controller links to each other with the input of second coupler, the output of second coupler links to each other with the input of straight wave guide, the distance of silicon-based micro ring and straight wave guide is tens to the hundreds of nanometer, the output of straight wave guide links to each other with power splitter, by power splitter with the power separated into two parts, wherein high-power part output links to each other with binary channels wavelength Conversion measuring system, and the part output that power is little links to each other with power monitor.Wherein electron beam lithography is adopted in the preparation of silicon-based micro ring, sidewall at little ring produces periodic optical grating construction, grating pair reflects by the light that straight wave guide enters little ring, the resonance peak of ring resonator is divided, form two resonance peaks that lean on very closely (spacing is less than a nanometer).
Described binary channels wavelength Conversion measuring system comprises the 3rd image intensifer, tunable and oscilloscope.The output that is input as the silicon-based micro ring resonator system of the 3rd image intensifer, the output of the 3rd image intensifer links to each other with the input of tunable, the bandwidth of tunable is less than or equal to 0.3nm, be used for leaching a detectable signal passage, the output of tunable links to each other with oscillographic input, by oscilloscope measurement wavelength Conversion waveform.
Compared with prior art, the present invention has following beneficial effect: the present invention uses the device of silicon-based micro ring resonator as the binary channels wavelength Conversion, volume little (radius has only several microns to tens microns) compared to existing technologies, and the semiconductor optical amplifier size generally has a millimeter magnitude in the prior art, the nonlinear optical fiber size is generally a meter magnitude, electroabsorption modulator is generally a millimeter magnitude, and lithium columbate crystal is generally a millimeter magnitude.Because the manufacture craft and the very lagre scale integrated circuit (VLSIC) of silicon on insulated substrate are identical, it is integrated therefore to be easy to extensive photoelectricity simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 carries out the installation drawing and the device architecture figure of binary channels wavelength Conversion for the embodiment of the invention;
Wherein: Fig. 2 (a) is the installation drawing that embodiment carries out the binary channels wavelength Conversion; Fig. 2 (b-i) is the vertical view of silicon-based micro ring; Fig. 2 (b-ii) is the cross sectional representation of silicon-based micro ring.
Fig. 3 is embodiment of the invention test result figure;
Wherein: Fig. 3 (a) is the harmonic light spectrogram of embodiment silicon-based micro ring; Fig. 3 (b) is an embodiment binary channels wavelength Conversion oscillogram.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: detection signal generator, pump signal generator, silicon-based micro ring resonator system, binary channels wavelength Conversion measuring system.Wherein the output of pump signal generator and detection signal generator links to each other with the input of silicon-based micro ring resonator system simultaneously, and the output of silicon-based micro ring resonator system links to each other with the input of binary channels wavelength Conversion measuring system.
Described detection signal generator, comprise first tunable laser, second tunable laser, first Polarization Controller, second Polarization Controller, first coupler, first image intensifer, wherein first tunable laser and second tunable laser all produce continuous laser, corresponding respectively two resonance peaks of wavelength with mode abruption, the output of first tunable laser links to each other with the input of first Polarization Controller, the output of second tunable laser links to each other with the input of second Polarization Controller, first Polarization Controller and second Polarization Controller are controlled the polarization state of two beam detection signals that enter waveguide respectively, the output of two Polarization Controllers links to each other with the input of first coupler, and the output of first coupler links to each other with the input of first image intensifer.
Described pump signal generator comprises the 3rd tunable laser, electric signal generator, electrooptic modulator, second image intensifer, the 3rd Polarization Controller.Wherein: the 3rd tunable laser produces continuous laser, another one resonance location in the corresponding ring resonator of wavelength, its output port links to each other with the input port of electrooptic modulator, the electric signal generator output port links to each other with the electric signal input end mouth of electrooptic modulator, electrooptic modulator is responsible for the signal of telecommunication is modulated on the light, produce the light signal of non-return-to-zero form, and with second image intensifer light signal is amplified with as pump light, the output of second image intensifer links to each other with the input of the 3rd Polarization Controller.
Described silicon-based micro ring resonator system comprises silicon-based micro ring, straight wave guide, second coupler, power splitter, power monitor.The output of first image intensifer and the 3rd Polarization Controller links to each other with the input of second coupler, the output of second coupler links to each other with the input of straight wave guide, the distance of silicon-based micro ring and straight wave guide is tens to the hundreds of nanometer, the output of straight wave guide links to each other with power splitter, by power splitter with the power separated into two parts, wherein the output of power major part links to each other with binary channels wavelength Conversion measuring system, and the output of power smaller portions links to each other with power monitor.Wherein electron beam lithography is adopted in the preparation of silicon-based micro ring, sidewall at little ring produces periodic optical grating construction, grating pair reflects by the light that straight wave guide enters little ring, the resonance peak of ring resonator is divided, form two resonance peaks that lean on very closely (spacing is less than a nanometer).
Described binary channels wavelength Conversion measuring system comprises the 3rd image intensifer, tunable and oscilloscope.The output that is input as the silicon-based micro ring resonator system of the 3rd image intensifer, the output of the 3rd image intensifer links to each other with the input of tunable, the bandwidth of tunable is less than or equal to 0.3nm, be used for leaching a detectable signal passage, the output of tunable links to each other with oscillographic input, by oscilloscope measurement wavelength Conversion waveform.
As shown in Figure 2, carry out the installation drawing and the device architecture figure of binary channels wavelength Conversion for embodiment.Fig. 2 (a) is an installation drawing.At the detection signal generator branch road, first tunable laser and second tunable laser produce the continuous flashlight of two bundles respectively, when the two-beam wavelength is positioned at two resonance locations (1552.54nm and 1552.95nm) of division, can obtain non-return binary channels wavelength Conversion, when the two-beam wavelength is positioned at two resonance left sides (1552.50nm and 1552.90nm) of division, can obtain reverse binary channels wavelength Conversion, first Polarization Controller and second Polarization Controller are controlled the polarization state of the detectable signal that enters waveguide respectively.Two beam detection signals are coupled through first three-dB coupler, amplify through first erbium-doped fiber amplifier then.
At pump signal generator branch road, the light carrier that wavelength is about the 3rd tunable light source output of 1560.5nm enters a Mach zehnder modulators.The bias voltage of Mach zehnder modulators is about 3.1V.Electric signal generator produces 1Gb/s, and length is 2
7-1 pseudo random sequence after electric amplifier amplifies, drives the light signal that the Mach zehnder modulators produces amplitude modulation(PAM).The output of Mach zehnder modulators is amplified the back through second erbium-doped fiber amplifier and is linked to each other with the 3rd Polarization Controller.
Survey light and flashlight and be coupled into the silicon-based micro ring resonator system, through the power splitter separated into two parts of the light signal behind the silicon-based micro ring resonator with 95:5 by second three-dB coupler.Wherein the light of 95% part is as the input of binary channels wavelength Conversion test macro, and other 5% part is used for power monitoring.
In binary channels wavelength Conversion test macro, the 3rd erbium-doped fiber amplifier is used to amplify output signal, improves signal to noise ratio, thereafter tunable, bandwidth is 0.3nm, leaches in order to the wavelength converted signal with a passage, filtered signal its waveform of oscillograph recording.
Fig. 2 (b-i) is the vertical view of silicon-based micro ring.The silicon-based micro ring radius is 10 microns, and little ring and straight wave guide are wide all to be 450 nanometers, and the air gap between straight wave guide and the ring is 120 nanometers.Fig. 2 (b-ii) is the cross sectional representation of silicon-based micro ring.The silicon structure the top that is used for making on the insulator of silicon-based micro ring is the monocrystalline silicon of 250 nanometer thickness, and the centre is the silicon dioxide resilient coating of 3 micron thickness, and the bottom is the silicon substrate of 525 micron thickness.
Fig. 3 is embodiment of the invention test result figure.Fig. 3 (a) has the resonance peak of mode abruption near 1552.75nm for the silicon based annular resonant cavity that records.Two resonance peaks with mode abruption lay respectively at 1552.54nm and 1552.95nm place, the 0.41nm of being separated by.The left side resonance peak degree of depth is about 13.2dB, and three dB bandwidth is about 0.09nm; The right resonance peak degree of depth is about 12.4dB, and three dB bandwidth is about 0.07nm.When two detectable signals are respectively λ 1 and λ 2, can obtain non-return binary channels wavelength Conversion, when two detectable signals are respectively λ 3 and λ 4, can obtain reverse binary channels wavelength Conversion.Fig. 3 (b-i) is the waveform of pump signal, Fig. 3 (b-ii) and (b-iii) be respectively non-return passage 1 and the waveform of passage 2 after wavelength Conversion, Fig. 3 (b-iv) and (b-v) be respectively backward channel 1 and the waveform of passage 2 after wavelength Conversion has verified the feasibility of binary channels Wavelength converter.
Claims (5)
1. device based on the binary channels wavelength Conversion of mode abruption silicon-based micro ring, comprise: detection signal generator, the pump signal generator, the silicon-based micro ring resonator system, binary channels wavelength Conversion measuring system, it is characterized in that, the output of pump signal generator and detection signal generator links to each other with the input of silicon-based micro ring resonator system simultaneously, the output of silicon-based micro ring resonator system links to each other with the input of binary channels wavelength Conversion measuring system, wherein: described silicon-based micro ring resonator system, comprise silicon-based micro ring, straight wave guide, second coupler, power splitter, power monitor, the output of second coupler links to each other with the input of straight wave guide, the distance of silicon-based micro ring and straight wave guide is tens to the hundreds of nanometer, the output of straight wave guide links to each other with power splitter, by power splitter with the power separated into two parts, wherein high-power part output links to each other with binary channels wavelength Conversion measuring system, the part output that power is little links to each other with power monitor, the sidewall of described silicon-based micro ring has periodic optical grating construction, grating pair reflects by the light that straight wave guide enters little ring, form two lean on very near resonance peak, its spacing is less than a nanometer; Described silicon-based micro ring radius is 10 microns, little ring and straight wave guide are wide all to be 450 nanometers, air gap between straight wave guide and the ring is 120 nanometers, the silicon structure the top that is used for making on the insulator of silicon-based micro ring is the monocrystalline silicon of 250 nanometer thickness, the centre is the silicon dioxide resilient coating of 3 micron thickness, the bottom is the silicon substrate of 525 micron thickness, and power splitter is 95: 5 a power splitter.
2. the device of the binary channels wavelength Conversion based on the mode abruption silicon-based micro ring according to claim 1, it is characterized in that, described detection signal generator, comprise first tunable laser, second tunable laser, first Polarization Controller, second Polarization Controller, first coupler, first image intensifer, wherein first tunable laser and second tunable laser all produce continuous laser, corresponding respectively two resonance peaks of wavelength with mode abruption, the output of first tunable laser links to each other with the input of first Polarization Controller, the output of second tunable laser links to each other with the input of second Polarization Controller, first Polarization Controller and second Polarization Controller are controlled the polarization state of two beam detection signals that enter waveguide respectively, the output of two Polarization Controllers links to each other with the input of first coupler, and the output of first coupler links to each other with the input of first image intensifer.
3. the device of the binary channels wavelength Conversion based on the mode abruption silicon-based micro ring according to claim 1, it is characterized in that, described pump signal generator, comprise the 3rd tunable laser, electric signal generator, electrooptic modulator, second image intensifer, the 3rd Polarization Controller, wherein: the 3rd tunable laser produces continuous laser, another one resonance location in the corresponding ring resonator of wavelength, its output port links to each other with the input port of electrooptic modulator, the electric signal generator output port links to each other with the electric signal input end mouth of electrooptic modulator, electrooptic modulator is responsible for the signal of telecommunication is modulated on the light, produce the light signal of non-return-to-zero form, and with second image intensifer light signal is amplified with as pump light, the output of second image intensifer links to each other with the input of the 3rd Polarization Controller.
4. the device of the binary channels wavelength Conversion based on the mode abruption silicon-based micro ring according to claim 1, it is characterized in that, described binary channels wavelength Conversion measuring system, comprise the 3rd image intensifer, tunable and oscilloscope, the output that is input as the silicon-based micro ring resonator system of the 3rd image intensifer, the output of the 3rd image intensifer links to each other with the input of tunable, the output of tunable links to each other with oscillographic input, by oscilloscope measurement wavelength Conversion waveform.
5. the device of the binary channels wavelength Conversion based on the mode abruption silicon-based micro ring according to claim 4 is characterized in that the bandwidth of described tunable is less than or equal to 0.3nm.
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| CN101833221B (en) * | 2010-04-02 | 2011-06-29 | 上海交通大学 | All-optical single side band (SSB) up conversion generator based on silicon-based micro ring resonator |
| CN102540626A (en) * | 2012-01-18 | 2012-07-04 | 中北大学 | Optical waveguide micro-ring resonant cavity-based all-optical logic gate and logic operation method thereof |
| CN103941516B (en) * | 2014-05-06 | 2017-01-18 | 中国科学院半导体研究所 | Adjustable high-frequency impulse light source based on silicon-based micro-ring resonant cavity carrier chromatic dispersion effect |
| EP4012854B1 (en) * | 2020-12-09 | 2023-07-12 | ADVA Optical Networking SE | Method and device for detecting absolute or relative temperature and/or absolute or relative wavelength |
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| CN1545171A (en) * | 2003-11-21 | 2004-11-10 | 南开大学 | Single-double wave convertible wavelength location and interval adjustable erbium doped fibre-optical laser |
| CN101093929A (en) * | 2006-06-22 | 2007-12-26 | 索尼株式会社 | Wave length transformation device and method |
| CN101206375A (en) * | 2007-11-29 | 2008-06-25 | 上海交通大学 | Device for conversion of all optical non-return-to-zero amplitude modulation code to bi-phase shift keying code |
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| CN1545171A (en) * | 2003-11-21 | 2004-11-10 | 南开大学 | Single-double wave convertible wavelength location and interval adjustable erbium doped fibre-optical laser |
| CN101093929A (en) * | 2006-06-22 | 2007-12-26 | 索尼株式会社 | Wave length transformation device and method |
| CN101206375A (en) * | 2007-11-29 | 2008-06-25 | 上海交通大学 | Device for conversion of all optical non-return-to-zero amplitude modulation code to bi-phase shift keying code |
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