CN116256926B - All-optical signal processing device - Google Patents
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- CN116256926B CN116256926B CN202310206281.5A CN202310206281A CN116256926B CN 116256926 B CN116256926 B CN 116256926B CN 202310206281 A CN202310206281 A CN 202310206281A CN 116256926 B CN116256926 B CN 116256926B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3515—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3515—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam
- G02F1/3521—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam using a directional coupler
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides an all-optical signal processing device, comprising: an optical coupler and a resonant cavity; the optical coupler comprises two branches; the parameters of the coupling area of the optical coupler are set to preset parameters, so that the optical coupler is a linear uncoupled device, light entering from one branch of the optical coupler is transmitted for at least one integer period in the optical coupler, and finally all light exits from the corresponding through port; the resonant cavity comprises one branch and an additional unit in the two branches, and the additional unit is used for matching with the corresponding branch to form the resonant cavity; when the signal light is incident to the all-optical signal processing device from the other branch of the two branches, the corresponding pump light is enhanced under the resonance enhancement effect of the resonant cavity, so that the efficiency of nonlinear effect in the all-optical signal processing device is improved, and the incident signal light is not influenced by the filtering effect of the resonant cavity because the optical coupler is a linear uncoupled device, so that a broadband optical signal can pass through the all-optical signal processing device without distortion.
Description
Technical Field
The invention belongs to the field of all-optical communication, and particularly relates to an all-optical signal processing device.
Background
In order to meet the demands of rapid development of modern information technology, the speed and capacity of optical fiber communication systems as backbone networks have been increasing, such as Wavelength Division Multiplexing (WDM), optical Time Division Multiplexing (OTDM), and Mode Division Multiplexing (MDM) technologies have been practically deployed in optical communication systems. Communication systems based on digital electronic processing have now come closer to the processing limits of electronics, and the rate bottleneck of opto-electronic-optical technology has become a great resistance to further development of communication systems. The speed bottleneck of the optical-electric-optical technology is mainly limited by the physical characteristics of electrons, and is difficult to overcome from the technical level, so that the transmission, exchange and processing of data are all carried out in the optical domain, and the all-optical communication network which avoids the electronic bottleneck brought by the optical-electric-optical mode is greatly focused. On the other hand, the development of semiconductor technology is mature, and the development of integrated optical devices is greatly promoted. The integrated optical device has the advantages of small size, low power consumption, high stability and the like, and the integrated photoelectron technology has become the development direction of the photoelectron technology. The photoelectronic integration technology is combined with optical nonlinearity, so that the functions of signal amplification, routing, logic processing and the like can be realized, and the method plays an important role in an all-optical communication network.
Fukuda et al in 2005 achieved all-optical wavelength conversion using a four-wave mixing (FWM) process in a silicon waveguide as shown in fig. 1. Then Yamada et al add a spot-size converter to the original structure to increase the conversion efficiency to-10.6 dB.2022 j.riemensberger et al realized a 12dB parametric gain with ultra low loss, ultra long silicon nitride optical waveguides under continuous optical pumping. All-optical signal processing devices based on waveguide structures, although simple in structure, generally require high pump power and long active length in order to ensure efficiency in the engineering usable range, which is very disadvantageous for the integration of the whole device.
P.Del' Hayel et al utilized Q values up to 10 in 2007 8 The resonance enhancement effect in the micro-ring of (a) achieves optical parametric oscillation. Later on, lipson group of Cornell university introduced a high Q micro-ring to further improve FWM conversion efficiency and reduce pumping power, using Si 3 N 4 The micro-ring achieves a high efficiency parametric oscillation requiring only a few mW of ultra low input power. Whereas Alessia Pasquazi et al effectively achieve 2.5Gbit/s wavelength conversion using the micro-ring four-wave mixing effect as shown in FIG. 2. The introduction of the micro-ring resonator effectively shortens the device length and greatly reduces the power of the pumping light on the premise of ensuring certain efficiency, but the Lorentz line type frequency response of the micro-ring resonator severely limits the device bandwidth.
F.Morrietti et al in 2015 realized wavelength conversion with 16dB improvement in efficiency over a single micro-loop as shown in FIG. 3 under 80GHz bandwidth and 12dBm pump injection conditions using traveling wave resonant four-wave mixing in an eight-loop coupled cavity optical waveguide, which is less robust.
From the prior art, the following is considered:
1. the nonlinear effect in the waveguide structure is utilized to realize all-optical signal processing, the bandwidth mainly depends on materials and waveguide design, the bandwidth upper limit is high, but the efficiency per unit length is low, and in order to ensure certain efficiency, a large device size and high pumping power are required, so that the integration is not facilitated.
2. All-optical signal processing is realized by utilizing the nonlinear effect in the high-Q resonant cavity, and the nonlinear generation efficiency can be effectively improved by utilizing the resonance enhancement effect of the resonant cavity, so that the power consumption of the device is reduced. However, the high-Q resonant cavity has serious bandwidth limitation, and the bandwidth of a corresponding device is severely limited.
3. The nonlinear effect in the multiple coupling resonant cavities is utilized to realize all-optical signal processing, and compared with a device which only utilizes one micro-ring resonant cavity, the device can realize larger bandwidth under the same efficiency. But the sensitivity of the multiple coupled resonator structures to parameters is too high and the stability is poor. In addition, since signals are generally processed by the resonant cavity, a significant upper limit exists on the bandwidth of the device all the time, and the Free Spectral Range (FSR) of the resonant device cannot be broken through.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an all-optical signal processing device and aims to solve the problem that the efficiency and bandwidth of an optical device are mutually restricted in the prior art.
To achieve the above object, the present invention provides an all-optical signal processing device including: an optical coupler and a resonant cavity;
the optical coupler comprises two branches; the parameters of the coupling area of the optical coupler are set to preset parameters, so that the optical coupler is a linear uncoupled device, light incident from one branch of the optical coupler is transmitted for at least one integer period in the optical coupler, and finally all light is emitted from the corresponding through port;
the resonant cavity comprises one branch and an additional unit, wherein the one branch is used for matching with the corresponding branch to form the resonant cavity;
when the signal light is incident to the all-optical signal processing device from the other branch of the two branches, the corresponding pump light is enhanced under the resonance enhancement effect of the resonant cavity, so that the efficiency of nonlinear effect in the all-optical signal processing device is improved, and the incident signal light is not influenced by the filtering effect of the resonant cavity because the optical coupler is a linear uncoupled device, so that a broadband optical signal can pass through the all-optical signal processing device without distortion.
In an alternative example, one of two branches included in the resonant cavity is set as a first branch;
the first branch is connected end to form a traveling wave resonant cavity;
the additional unit is a straight waveguide;
the traveling wave resonant cavity and the straight waveguide are coupled into the resonant cavity.
In an alternative example, one of two branches included in the resonant cavity is set as a first branch;
the additional unit includes: a partial mirror and a reflecting mirror;
one end of the first branch is connected with a part of the reflecting mirror, and the other end of the first branch is connected with the reflecting mirror to form a standing wave resonant cavity, and the standing wave resonant cavity is used as the resonant cavity.
In an alternative example, the partial mirror and the mirror are made of bragg gratings.
In an alternative example, the partial mirror and the mirror are made of photonic crystals.
In an alternative example, the optical coupler and the resonant cavity are of the same material.
In an alternative example, the loss of the optical coupler and the resonant cavity are each below 3 dB/cm.
In an alternative example, the cavity provides a power boost effect of 6dB or more, the power boost being defined as the ratio of the optical power in the cavity to the optical power input to the cavity.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
the invention provides an all-optical signal processing device, because the resonant cavity is used, the efficiency of nonlinear effect is improved by many times compared with that of a straight waveguide because of the resonance enhancement effect of the resonant cavity, the required waveguide size is greatly reduced, and the integration requirement is greatly facilitated. Compared with a single micro-ring system, the invention uses the coupler which is not coupled in a linear way, and can greatly expand the bandwidth of the device under the condition of ensuring the enhancement of the pumping light field to be unchanged. Compared with a multi-resonant cavity coupling structure, the invention has the advantages of better tolerance to system parameter errors, greatly reduced requirement to process precision and good thermal stability.
Drawings
FIG. 1 is a schematic illustration of a waveguide structure provided by the prior art;
FIG. 2 is a schematic diagram of a single micro-ring resonator provided in the prior art;
FIG. 3 is a schematic diagram of a prior art configuration for coupling a plurality of micro-ring resonators;
fig. 4 is a flowchart of a method for improving the processing efficiency of an all-optical signal according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a linear uncoupled coupler in accordance with the present invention and its internal light intensity profile;
FIG. 6 is a schematic diagram of an embodiment of the present invention;
FIG. 7 is a schematic view of another construction of an embodiment of the present invention;
fig. 8 is a schematic diagram of a processing result under the condition of inputting 8 paths of 50GHz signals in an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The invention provides an all-optical signal processing device which comprises a coupler which is not coupled in a linear way and a resonant cavity.
One branch of the coupler participates in forming a resonant cavity, light incident from one port transmits more than or equal to 1 integer period in the resonant cavity, and all energy is output from the corresponding through port.
The resonant cavity is better as the resonance enhancement is higher by using materials with small loss and designing coupling coefficients.
All-optical signal processing mainly occurs in a linearly uncoupled coupler, which relies on the physical process being optical nonlinearity. The pump light is directly incident into the resonant cavity, extremely high field enhancement is obtained in the resonant cavity, the whole resonant cavity is in an extremely high energy state, and the whole coupler is also in the extremely high energy state due to the intersection of the resonant cavity and the coupler, so that nonlinear effects can be generated in the coupler efficiently. The signal light is injected from the coupler which is not coupled in a linear way, and the signal light is not influenced by the filtering effect of the resonant cavity due to the linear non-coupling characteristic of the coupler, so that the whole device has extremely high signal bandwidth capable of being processed.
In an alternative example, the linearly uncoupled coupler and the resonator are of the same material.
In an alternative example, the linearly uncoupled coupler and the cavity material loss are each below 3 dB/cm.
Because the pump light is enhanced under the resonance enhancement effect of the resonant cavity, the whole resonant cavity is in a high-energy state, the coupler which participates in the linear uncoupled structure of the resonant cavity is also in the high-energy state, and the occurrence efficiency of the nonlinear process is obviously improved. The signal light is injected into the device from the coupler which is not coupled in a linear way, is not influenced by the filtering of the resonant cavity, the broadband signal can pass through the device without distortion, and the bandwidth of the device which can process the signal is nearly comparable with that of the waveguide.
As shown in fig. 4, the present invention provides a method of designing an all-optical signal processing device with high speed and low power consumption. The method comprises the following steps:
(1) The lower the loss of the all-pass resonant cavity is, the better the proper external coupling is designed, the stronger the resonance enhancement effect is, and the resonant cavity is in an extremely high energy state due to the resonance enhancement effect after the pump light is incident.
(2) The directional coupler is in a linear uncoupled state through proper design of the distance and the length, and one branch of the directional coupler participates in forming a resonant cavity to provide an occurrence place for the optical nonlinear effect.
(3) For pump light, resonance enhancement is obtained within the resonator, the whole resonator being at a high energy level, due to the condition that the directional coupler as proposed in (2) is also at a high energy level.
(4) For signal light, the filtering effect of the resonant cavity does not limit the bandwidth of the signal light due to the linear uncoupled characteristic of the directional coupler. The signal bandwidth which can be processed by the designed device is expected to be comparable with that of a waveguide.
The all-optical signal processing device designed according to the method can be divided into two parts: an all-pass resonant cavity for providing resonance enhancement for pump light and a coupler as a place where nonlinear effects occur. The structure of the all-optical signal processing device designed by the method is as follows:
the all-pass resonant cavity provides a significant resonant enhancement for the pump light within the cavity. The coupler has a branch belonging to a part of the cavity, and the intensity of the pump light in the coupler is enhanced by the same resonance as the other parts of the cavity. The coupler is designed to be linearly uncoupled, light is coupled from an input branch to another branch in the coupler after being input, and then is coupled back to the input branch, and the integral process of 1 or more is repeated, as shown in fig. 5, so that the bandwidth of the device is ensured not to be influenced by the resonant cavity, meanwhile, pump light is not leaked, and the nonlinear effect of the whole device mainly occurs in the area.
The input pump light can obtain great resonance enhancement in the resonant cavity, and the pump light can obtain the resonance enhancement effect of more than 12dB, and as one branch of the coupler is a part of the resonant cavity, the whole coupler is also in a very high energy state in the coupling area.
The signal light is input from the coupler which is not coupled in a linear way, the signal light can not interfere in the resonant cavity, the bandwidth of the signal which can be processed by the whole system is not limited by the filtering effect of the resonant cavity, the limit of the free spectrum range of the resonant cavity can be broken through, and the bandwidth can reach tens of THz and the specific shoulder of the waveguide device.
Nonlinear effects of pump light and signal light occur mainly in the coupling region of the linear uncoupled coupler. The coupler will shorten the equivalent acting length, but the presence of the resonant cavity places the coupler in a very high energy state, and, in combination, the efficiency of the nonlinear effects occurring therein will be improved by at least 10dB over the same length waveguide, with specific improvements being related to the device being designed.
Furthermore, the all-pass resonant cavity is designed with external coupling as far as possible, so that the pump light resonance enhancement is strongest under the condition of a certain intrinsic Q value.
Further, the lower the loss of the cavity, the better, and the material loss used is 3dB/cm or less.
Furthermore, as a coupler of a place where nonlinear effect mainly occurs, the optical input is realized by controlling the length and the coupling strength of the coupling area, and then the optical input is coupled from an input branch to another branch and back to the input branch in the coupler, and the integral process of 1 or more is repeated. The invention solves the problem of low efficiency of the existing all-optical signal processing device under the condition of large bandwidth, and provides a method suitable for designing the high-speed low-power-consumption all-optical signal processing device.
Specifically, the invention provides a method for improving nonlinear efficiency by combining a linear uncoupled coupler with resonant cavity resonance enhancement characteristics. According to the method, the coupler is designed to be linearly uncoupled, and separation regulation and control of pump light and signal light input into a designed device are realized.
The all-optical signal processing device provided by the invention needs to meet the following conditions (1) for pump light, the higher the intracavity resonance enhancement provided by the all-pass resonant cavity should be, the better; (2) For signal light, the larger the bandwidth provided by the device, the better, and the longer the nonlinear action occurrence length.
The invention meets the above requirements by the following design: (1) The closer the external Q value of the full-pass resonant cavity is to the intrinsic Q value of the resonant cavity, the better the Q value of the full-pass resonant cavity is, the lower the loss of materials selected for manufacturing devices is, and the higher the resonance enhancement of pump light in the resonant cavity is; (2) The coupler realizes the coupling from the input branch to another branch in the coupler after the optical input by adjusting the distance between the couplers and the length of the coupling area, and then couples back to the input branch, and the integer process of 1 or more is repeated, and the longer the length of the coupling area is, the better.
For the purpose of describing the characteristics of the invention in detail, all-optical wavelength conversion example analysis based on four-wave mixing effect in nonlinear effect in all-optical signal processing is selected. The four-wave mixing effect is a very common nonlinear effect, and has wide application in all-optical signal processing. By taking the example, the proposal can be well embodied, and the efficiency of the nonlinear all-optical signal processing device can be improved.
As shown in FIG. 6, the invention is composed of a coupler with a long coupling area and an all-pass micro-ring resonant cavity, and one branch of the coupler also participates in forming the resonant cavity. The resonant cavity in the invention has no specific form requirement, and the higher the resonance enhancement effect of the all-pass resonant cavity is, the better the coupler with a long coupling area is, and the closer the coupler is to the linear uncoupled condition is. The design of replacing the micro-ring resonator with other resonator types such as photonic crystal cavity should also be included in the protection scope of the present invention, and particularly, referring to fig. 7, the partial reflectors and mirrors in fig. 7 may be implemented by bragg gratings or photonic crystals, and reference is made to the standing wave resonator in the prior art, which is not described in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in FIG. 6, an embodiment of the present invention was constructed using a micro-ring resonator with a unit loss of 2 dB/cm. For a circumference of L, the effective refractive index is n eff The m-order resonant wavelength of the micro-ring resonant cavity of the (2) is as follows:m is an integer greater than or equal to 1. Perimeter L and effective refractive index n eff The parameter value is selected to satisfy the requirement that the wavelength of the pump light is the resonance wavelength.
For the present example, n is selected eff Material preparation of =2.26 microring with circumference of 1.4mm and coupling region coupling strength of 4.882 ×10 3 m -1 The coupling length of the coupler is 1.3mm, 1550nm is the wavelength of pumping light used in the example, 1550nm is the resonant wavelength of the micro-ring resonant cavity designed in the example, pumping light can obtain extremely large resonance enhancement in the resonant cavity, signal light is coupled to the other branch from the input branch in the coupler and is coupled back to the input branch, the integral process of 1 time or more is repeated, nonlinear effect can be generated between the signal light and the pumping light after resonance enhancement, but the signal light cannot be filtered by the resonant cavity, and the signal light can be correctly processed by a device.
Referring now to the symbols shown in fig. 6, the coupling coefficient of the straight waveguide and the micro-ring of the all-pass resonant cavity is k, the transmission coefficient is r, the ring path transmission coefficient of the resonant cavity is a, and the ring Cheng Touguo coefficient is determined by the loss coefficient α (including material loss, bending loss, scattering loss, etc.): a=exp (- αl/2).
For all-optical wavelength conversion applications based on four-wave mixing demonstrated in this example, the conversion light generation efficiency is determined by:wherein P is an input deviceThe pumping light power, gamma is the nonlinear coefficient of the waveguide, L eff F is the effective length of the coupling region of the coupler p Is the intensity gain factor of the resonant cavity for the pump light.
Compared with the prior device, the system demonstrated by the embodiment of the invention greatly improves the pumping light intensity under the condition of guaranteeing the bandwidth of the device, thereby greatly improving the efficiency.
A specific set of parameters for an embodiment of the present invention are given in table 1 below:
TABLE 1
The input 1550nm pump light resonates in the resonant cavity, and all positions in the cavity are in a very high energy state; the input signal light is not coupled linearly, so that the signal light cannot interfere in the resonant cavity, the bandwidth cannot be influenced by the resonant cavity, and the nonlinear efficiency is greatly improved under the condition of guaranteeing the bandwidth of the device.
Fig. 8 is a graph showing the result of the operation of the embodiment of the present invention under the condition of inputting 8 paths of 50GHz non-return-to-zero code signals with an interval of 12.5 GHz. As shown in FIG. 8, the 8 paths of signals can realize the conversion efficiency of-9 dB, and the conversion efficiency is improved by 11dB (about 12 times) compared with the waveguide conversion efficiency with the same length.
The micro-ring resonant cavity is used in the description process, but the invention is not limited to the type of resonant cavity, and other types of resonant cavities are also used in the protection scope of the invention.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. An all-optical signal processing device, comprising: an optical coupler and a resonant cavity;
the optical coupler comprises a first branch and a second branch; the parameters of the coupling area of the optical coupler are set to preset parameters, so that the optical coupler is a linear uncoupled device, light incident from the second branch of the optical coupler is transmitted in the optical coupler for at least one integer period, and finally all light is emitted from the corresponding through port;
the resonant cavity comprises the first branch and an additional unit, and the additional unit is used for being matched with the corresponding branch to form the resonant cavity;
when the signal light is incident to the all-optical signal processing device from the second branch and the pump light is input to the all-optical signal processing device from the additional unit, the corresponding pump light is enhanced under the resonance enhancement effect of the resonant cavity, so that the efficiency of nonlinear effect in the all-optical signal processing device is improved, and the signal light cannot interfere in the resonant cavity because the optical coupler is a linear uncoupled device, the incident signal light is not influenced by the filtering effect of the resonant cavity, so that a broadband optical signal can pass through the all-optical signal processing device without distortion, and the limit of the free spectral range of the resonant cavity can be broken through.
2. The all-optical signal processing device according to claim 1, wherein the first branch is connected end to form a traveling wave resonant cavity;
the additional unit is a straight waveguide;
the traveling wave resonant cavity and the straight waveguide are coupled into the resonant cavity.
3. An all-optical signal processing device according to claim 1, wherein the additional unit comprises: a partial mirror and a reflecting mirror;
one end of the first branch is connected with a part of the reflecting mirror, and the other end of the first branch is connected with the reflecting mirror to form a standing wave resonant cavity.
4. A full optical signal processing device according to claim 3, wherein the partial mirror and the mirror are made of bragg gratings.
5. A full optical signal processing device according to claim 3, wherein the partial mirror and the mirror are made of photonic crystals.
6. An all-optical signal processing device according to claim 2, wherein the optical coupler and the resonant cavity are of the same material.
7. An all-optical signal processing device according to any one of claims 1 to 6, wherein the optical coupler and the resonant cavity each have a loss of 3dB/cm or less.
8. An all-optical signal processing device according to any one of claims 1 to 6, wherein the resonant cavity provides a power boost effect of 6dB or more, the power boost being defined as the ratio of the optical power in the resonant cavity to the optical power input to the resonant cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310206281.5A CN116256926B (en) | 2023-03-01 | 2023-03-01 | All-optical signal processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310206281.5A CN116256926B (en) | 2023-03-01 | 2023-03-01 | All-optical signal processing device |
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| Publication Number | Publication Date |
|---|---|
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| EP0730191A2 (en) * | 1995-03-02 | 1996-09-04 | AT&T Corp. | Intra-cavity optical four-wave mixer and optical communications system using the same |
| CN114280873A (en) * | 2020-11-17 | 2022-04-05 | 华中科技大学 | Method for improving strength of nonlinear effect in resonant cavity |
| CN115268162A (en) * | 2021-04-30 | 2022-11-01 | 华中科技大学 | Nonlinear optical device |
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| US7324267B2 (en) * | 2002-06-28 | 2008-01-29 | Pirelli & C. S.P.A. | Four-wave-mixing based optical wavelength converter device |
| US7489439B2 (en) * | 2006-09-12 | 2009-02-10 | Intel Corporation | Semiconductor Raman ring amplifier |
| WO2010138849A1 (en) * | 2009-05-29 | 2010-12-02 | Massachusetts Institute Of Technology | Cavity dynamics compensation in resonant optical modulators |
| US9948056B2 (en) * | 2016-09-22 | 2018-04-17 | LGS Innovations LLC | High-Q amplified resonator |
| WO2020000107A1 (en) * | 2018-06-29 | 2020-01-02 | Xanadu Quantum Technologies Inc. | Systems and methods for nonlinear optical light generation using linearly uncoupled resonators in integrated photonic devices |
| US11221540B2 (en) * | 2019-09-17 | 2022-01-11 | Government Of The United States Of America, As Represented By The Secretary Of Commerce | Optical parametric oscillator and producing idler coherent light and signal coherent light from pump coherent light |
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| EP0730191A2 (en) * | 1995-03-02 | 1996-09-04 | AT&T Corp. | Intra-cavity optical four-wave mixer and optical communications system using the same |
| CN114280873A (en) * | 2020-11-17 | 2022-04-05 | 华中科技大学 | Method for improving strength of nonlinear effect in resonant cavity |
| CN115268162A (en) * | 2021-04-30 | 2022-11-01 | 华中科技大学 | Nonlinear optical device |
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| Generation of photon pairs by spontaneous four-wave mixing in linearly uncoupled resonators;Luca Zatti等;Phys.Rev.A;第107卷;013514 * |
| Nonlinear Interactions in Linearly Uncoupled Resonators;M. Menotti等;CLEO;18864026 * |
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