CN106684677A

CN106684677A - Disorder-based multi-channel partial optical amplifier and compensation method therefor

Info

Publication number: CN106684677A
Application number: CN201710010715.9A
Authority: CN
Inventors: 尹红伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-01-06
Filing date: 2017-01-06
Publication date: 2017-05-17

Abstract

The invention discloses a disorder-based multi-channel partial optical amplifier and a compensation method therefor. The partial optical amplifier is designed by the steps of regulating the disorder of a gain reflector-cavity structure, and taking a separation factor and a strength factor as criteria of a disorder adjustment effect; and by performing multiple times of optimization on the disorder of the gain reflector-cavity structure, enabling all channel wavelengths and channel outer wavelengths to achieve preset separator factor and strength factor. Since that an magnification time has no positive correlation relation with gain or pumping power, irregular change of the magnification time can be caused by changing the gain or pumping power in a working process, and then disorder compensation to the influence caused by the changing of the gain or pumping power is performed; and in addition, the reflector-cavity structure can be corresponding to multiple physical realization ways, so that requirements of different application scenarios can be well satisfied.

Description

Based on unordered multichannel local image intensifer and its compensation method

Technical field

It is more particularly to a kind of based on unordered multichannel local light amplification the invention belongs to image intensifer or field of lasers Device and compensation method.

Background technology

《It is natural》Magazine has delivered a paper for 2004, proposes " unordered is a kind of new orderly ", and " unordered device may With than traditional orderly device better performance ", referring to bibliography [1].In Disordered Media, ripple is by local in medium The Anderson local effects of portion-i.e., referring to bibliography [2].

Local of the ripple in one-dimensional disorder medium show as a series of random distributions with compared with high transmittance and more high-strength The resonance for spending distribution passes through wavelength, referring to bibliography [3].These resonance can be used for controlling laser output spectrum through wavelength With reduction laser work threshold value, the layered medium of the one-dimensional disorder medium including thickness random distribution of document report is (referring to reference Document [4] [5]) and optical fiber Bragg raster array (referring to bibliography [6] [7]).But, the local of above-mentioned document report shows As clearly disadvantageous with one：The unordered and caused local introduced in one-dimensional medium is all random, it means that nothing The resonance that sequence is introduced passes through peak spectrally random distribution, and the transmitance with random fluctuation.

But, it is that channel position is random, passage multiplication factor is for tool the characteristics of above-mentioned Disordered Media is as image intensifer Body running condition and its sensitivity.Especially, the change of pump power (the specific gain of correspondence) can cause the random of multiplication factor Change, so unordered compensation is essential for the steady operation of the image intensifer based on Disordered Media.

The content of the invention

The invention provides a kind of based on unordered multichannel local image intensifer and its compensation method, it is intended that The stable of multiple passages amplifies in the case of realizing local image intensifer operation conditions change, and realizes to the real-time of multiple passages Independent control.It is a kind of based on unordered multichannel local image intensifer, based on gain reflection device-cavity configuration, adjust gain The unordered factor of reflector-cavity configuration is to change the channel strength factor and separation factor, so that it is determined that the reflectance factor of reflector And/or optical thickness and/or reflector and the gain in chamber in chamber, obtain amplification channel position and multiplication factor stabilization and can be real-time The local image intensifer of Independent adjustable；

It is to carry out the key that unordered compensation in real time is the stabilization amplification of local image intensifer that gain is changed；

Gain reflection device-the cavity configuration includes N+1 reflector (R₁,R₂,…,R_N+1) and N number of chamber (C₁,C₂,…,C_N), There is arbitrarily N+1 reflector (R in gain₁,R₂,…,R_N+1) and/or N number of chamber (C₁,C₂,…,C_N) on；

Wherein, the unordered factor of the gain reflection device-cavity configuration includes the unordered factor (α of reflector₁,α₂,…, α_N+1), the unordered factor (β in chamber₁,β₂,…,β_N) and reflector and chamber the unordered factor (A of gain₁,A₂,…,A_2N+1)：

(r₁,r₂,…,r_N+1) be respectively gain reflection device-cavity configuration in each reflector from left to right Orderly and unordered reflectance factor,(l₁,l₂,…,l_N) be respectively in gain reflection device-cavity configuration each chamber from Orderly and the disordered optical thickness, (g of left-to-right₁,g₂,…,g_2N+1) andRespectively gain reflection device-chamber Each reflector and chamber orderly and unordered gain from left to right in structure.

The unordered factor of reflector refers to the reflectance factor of reflector, and the unordered factor in chamber refers to the optics thickness in chamber Degree, the unordered factor of gain in reflector and chamber refers to being applied to the gain (or pump power) in reflector and chamber.

The change of the transmission multiplication factor for separation factor of local image intensifer channel wavelength and its sensitivity, and and intensity Factor correlation；Its left/right reflects multiplication factor and changes with through multiplication factor.

Specifically, the separation factor of the multiplication factor of local image intensifer channel wavelength is less than 10^-3, intensity factor is more than 50；The separation factor of the outer wavelength of local image intensifer passage is more than 10^-2And intensity factor is less than 20, while；

Wherein, λ₀It is designed central wavelength；For the outer wavelength X of any channel wavelength or passage of local image intensifer_j, f_dev (λ_j) it is separation factor, f_int(λ_j) it is intensity factor；

(S₁,S₂,…,S_2N+2) it is each slotted-type reflector surface in local image intensifer from left to right；

The intensity in each face is separated when inciding reflector-cavity configuration with the right side for the left incidence of light Degree, I_L(S₁,S₂,…S_2N+2；λ_j) andWhen respectively light incides reflector-cavity configuration from a left side each The intensity and normalized intensity in face, I_R(S₁,S₂,…S_2N+2；λ_j) andRespectively light is incided from the right side The intensity and normalized intensity in each face during reflector-cavity configuration；

Refer to the intensity in each face when the left incidence of light incides reflector-cavity configuration with the right side The sum of separating degree；

max[I_L(S₁,S₂,…S_2N+2；λ_j)] refer to when light incides reflector-cavity configuration from a left side in each surface intensity most Big intensity；

max[I_R(S₁,S₂,…S_2N+2；λ_j)] refer to maximum strong in each face when light incides reflector-cavity configuration from the right side Degree；

max[I_L(S₁,S₂,…S_2N+2；λ_j)+I_R(S₁,S₂,…S_2N+2；λ_j)] refer to that light incides reflector-chamber knot from a left side Maximum intensity when each surface intensity incides reflector-cavity configuration plus light from the right side during structure in each surface intensity；

The intensity and transmitance of the reflector-cavity configuration are calculated using coupling mode equations or transmission matrix and obtained.

Separation factor determines whether light amplifies, and intensity factor determines light amplification multiple；

The separation factor of the local image intensifer channel wavelength is less than 10^-3, intensity factor is more than 50, refers to that local light is put The separation factor of all channel wavelengths of big device is both less than 10^-3, intensity factor is both greater than 50；

The separation factor of the outer wavelength of the local image intensifer passage is more than 10^-2, intensity factor is less than 20, refers to local light The separation factor of the outer wavelength of all passages of amplifier is both greater than 10^-2, intensity factor is both less than 20.

Gain reflection device-the cavity configuration at least includes gain layered medium or gain fibre Bragg grating array；

The gain layered media refers to that medium interface is reflector, and dielectric layer is chamber, and gain puts on dielectric layer；

The gain fibre Bragg grating array refers to that optical fiber Bragg raster is reflector, and fiber segment is chamber, and gain is applied It is added on optical fiber Bragg raster or fiber segment.

The local image intensifer of the gain reflection device-cavity configuration amplifies comprising transmission, left reflection is amplified and right reflection is put Big 3 kinds of mode of operations；Wherein transmission amplifies incident from left side with the left reflection corresponding light of amplification, and transmission is amplified and right reflection amplifies right Ying Guangcong right sides are incident；

The gain of the local image intensifer of the gain reflection device-cavity configuration refers to that amplification of the pumping to light subtracts material pair The quiet gain of the absorption of light.

The multiplication factor of the local image intensifer of the gain reflection device-cavity configuration with to gain reflection device-cavity configuration Gain or pump power do not exist simple positive correlation, and pump power or gain are changed in the course of the work can be caused to amplify The random change of multiple；

The unordered compensation of the local image intensifer of the gain reflection device-cavity configuration include the unordered compensation of reflector, chamber without Sequence is compensated and the unordered compensation of gain, and the wherein unordered compensation of the unordered compensation of reflector and chamber is applied by gain reflection device-cavity configuration Plus external action is realized, the unordered compensation of gain is realized by changing the pumping condition to gain reflection device-cavity configuration.

The external action including pulling force, pressure, temperature etc., i.e., by change external force that reflector-cavity configuration is subject to or External environment influence, so as to change the unordered compensation of reflector and the unordered compensation in chamber.

The out-of-order design and principle and method used by unordered compensation of the local image intensifer of the gain reflection device-cavity configuration Unanimously, unordered compensation is to ensure that local image intensifer stabilization under various operating conditions is amplified or amplification performance entered Row real-time control and the real-time design that carries out.

The local image intensifer of the gain reflection device-cavity configuration can be made of various absorptivity materials, need to be met Condition is that overall gain amplifies the overall absorption for being more than material to light more than 0, i.e. pumping to the overall of light.

A kind of compensation method based on unordered multichannel local image intensifer, to being put based on unordered multichannel local light Big device is designed, and realizes unordered compensation, including following steps：

Step 1：Obtain the unordered factor of gain reflection device-cavity configuration；

The reflectance factor of the unordered factor including reflector, the unordered factor of the optical thickness in chamber and reflector and chamber The unordered factor of gain；

Step 2：In the case where the current unordered factor is set, all channel wavelengths and the outer wavelength of passage in local image intensifer are calculated λ_jSeparation factor f_dev(λ_j) and intensity factor f_int(λ_j)；

The intensity of the gain reflection device-cavity configuration is calculated using coupling mode equations or transmission matrix and obtained；

Step 3：In the case where the current unordered factor is set, judge whether to meet condition set by following criterion 1, any sentence if meeting According to then the current unordered factor sets and is required unordered factor setting, and adjusting and optimizing process terminates, if it is not satisfied, continuing to walk Rapid 4：

Criterion 1：Using the channel separation factor and intensity factor as judge index, the separation factor of all passage corresponding wavelengths Both less than 10^-350 are both greater than with intensity factor, while the separation factor of the outer wavelength of all passages is both greater than 10^-2And intensity factor Both less than 20；

Step 4：The unordered factor of adjust gain reflector-cavity configuration；

Step 5：Under the unordered factor after the adjustment is set, calculate in local image intensifer outside all channel wavelengths and passage Wavelength X_jTransmitance T (λ_j), left reflection multiplication factor R_L(λ_j), right reflection multiplication factor R_R(λ_j), separation factor f_dev(λ_j) and Intensity factor f_int(λ_j)；

Step 6：The unordered factor before judging relative to adjustment sets the criterion 1 or criterion 2 having, after adjustment it is unordered because Whether son meets criterion 2, if meeting, by adjustment after the unordered factor be provided as the basis of unordered factor adjustment next time, Return to step 3；If it is not satisfied, then by adjustment before the unordered factor be provided as the basis of unordered factor adjustment next time, returning Step 4：

Criterion 2：Smaller and intensity factor is all bigger compared with before adjusting before the separation factor of all channel wavelengths is all relatively adjusted, together Bigger and intensity factor is smaller before all relatively adjusting before the separation factor of the outer wavelength of Shi Suoyou passages is all relatively adjusted；

Wherein, the target strength factor of special modality is determined by the specific amplification requirement of its passage.

Beneficial effect

The invention provides a kind of based on unordered multichannel local image intensifer and its method, the local image intensifer with Unordered gain reflection device-cavity configuration, using the Anderson local effects of unordered initiation, is ground to realize platform by substantial amounts of Study carefully, in the Anderson local effects based on objective reality the creative design objective-separation for proposing local image intensifer because Son and intensity factor, this is completely different with mentality of designing of the prior art；Unordered adjustment proposed by the present invention is anti-to gain Each unit in emitter-cavity configuration carries out different regulations simultaneously, and using separation factor and intensity factor as regulating effect Criterion.Local image intensifer is only effectively amplified to the channel wavelength in localized modes, with good wavelength selectivity, And small gain can realize very big multiplication factor.

The multiplication factor of local image intensifer determined by separation factor and intensity factor, and simple positive correlation is had no with gain Relation；Changing gain can cause the random change of separation factor and intensity factor, and then cause the random change of multiplication factor Change, therefore it is to carry out the key that unordered compensation is the stabilization amplification of local image intensifer that gain is changed.

Local image intensifer differs primarily in that its multiplication factor with gain or pump power not with traditional image intensifer There is positive correlation, gain or pump power are changed in the course of the work can cause the random change of multiplication factor, this hair It is bright to be exactly found that this rule, so propose to need to carry out unordered benefit to the influence caused by change gain or pump power Repay.So-called unordered compensation is real-time out-of-order design.Local image intensifer has 3 kinds of mode of operations：It is anti-through amplification mode, a left side Penetrate amplification mode and right reflection amplification mode.Local image intensifer is only effectively amplified to the channel wavelength in localized modes, With good wavelength selectivity, and small gain can realize very big multiplication factor.Reflector-cavity configuration can correspond to many Physics realization is planted, the demand of different application scene can be well met.

The design of the local image intensifer passes through the unordered of adjust gain reflector-cavity configuration, and with separation factor and by force Spend criterion of the factor as unordered regulating effect；By the unordered multiple adjusting and optimizing process to gain reflection device-cavity configuration, Finally so that all channel wavelengths and the outer wavelength of passage all reach separation factor set in advance and intensity factor, on amplification performance It is presented as the transmission multiplication factor less than 2 outside transmission multiplication factor of the channel wave strong point more than 5 and the outer wavelength of passage.Use increasing Beneficial reflector-cavity configuration can correspond to various physics realizations, including be realized and based on gain fibre based on gain layered medium Bragg grating array is realized.Local image intensifer based on gain layered medium can be realized in wide spectral range (hundred nm grades) One or more light amplification passages, any channel width be nm grades, the local light based on gain fibre Bragg grating array is put Big device can realize in narrow spectral region one or more light amplification passages of (nm grade), and any channel width is pm grades, can be with The good demand for meeting different application scene.

Local image intensifer proposed by the present invention is capable of achieving in the situation that system architecture determines by adjusting the unordered factor Single or multiple passages it is separately adjustable.The design freedom of local image intensifer proposed by the present invention includes number of channels, leads to Road position and channel width, can meet the related needs of different field；By to chamber it is unordered, reflector is unordered or gain is unordered Real-Time Compensation, it is possible to achieve local image intensifer under various operating conditions stabilization amplification, it is also possible to realize that local light is put The independent real-time, tunable of multiple passages of big device.

Brief description of the drawings

Fig. 1 is unordered gain reflection device-cavity configuration schematic diagram；

Fig. 2 be example 1 in gain reflection device-cavity configuration using gain layered medium schematic diagram；

Fig. 3 be example 2 in gain reflection device-cavity configuration using gain fibre Bragg grating array schematic diagram；

Fig. 4 is the unordered factor schematic diagram in chamber of the unordered Compensation Design local image intensifer in chamber based on gain layered medium；

Fig. 5 is that the transmission multiplication factor of the unordered Compensation Design local image intensifer in chamber based on gain layered medium is illustrated Figure；

Fig. 6 is that the left reflection multiplication factor of the unordered Compensation Design local image intensifer in chamber based on gain layered medium is illustrated Figure；

Fig. 7 is that the right reflection multiplication factor of the unordered Compensation Design local image intensifer in chamber based on gain layered medium is illustrated Figure；

Fig. 8 is that the dielectric layer refractive index of the unordered Compensation Design local image intensifer of reflector based on gain layered medium is shown It is intended to；

Fig. 9 is that the transmission multiplication factor of the unordered Compensation Design local image intensifer of reflector based on gain layered medium is shown It is intended to；

Figure 10 is that the unordered factor of gain of the unordered Compensation Design local image intensifer of gain based on gain layered medium is shown It is intended to；

Figure 11 is that the transmission multiplication factor of the unordered Compensation Design local image intensifer of gain based on gain layered medium is shown It is intended to；

Figure 12 be the unordered Compensation Design local image intensifer in chamber based on gain fibre Bragg grating array chamber it is unordered because Sub- schematic diagram；

Figure 13 is the unordered Compensation Design local image intensifer in chamber based on gain fibre Bragg grating array through amplification Multiple schematic diagram；

Figure 14 is that the left reflection of the unordered Compensation Design local image intensifer in chamber based on gain fibre Bragg grating array is put Big multiple schematic diagram；

Figure 15 is that the right reflection of the unordered Compensation Design local image intensifer in chamber based on gain fibre Bragg grating array is put Big multiple schematic diagram；

Figure 16 is the reflection of the unordered Compensation Design local image intensifer of reflector based on gain fibre Bragg grating array The unordered factor schematic diagram of device；

Figure 17 is the transmission of the unordered Compensation Design local image intensifer of reflector based on gain fibre Bragg grating array Multiplication factor schematic diagram；

Figure 18 be the unordered Compensation Design local image intensifer of gain based on gain fibre Bragg grating array gain without Sequence factor schematic diagram；

Figure 19 is that the transmission of the unordered Compensation Design local image intensifer of gain based on gain fibre Bragg grating array is put Big multiple schematic diagram.

Specific embodiment

Below in conjunction with drawings and Examples, the present invention is described further.

It is a kind of based on unordered multichannel local image intensifer, based on gain reflection device-cavity configuration, adjust gain is anti- The unordered factor of emitter-cavity configuration to change the channel strength factor and separation factor, so that it is determined that the reflectance factor of reflector and/ Or the gain of the optical thickness and/or reflector-cavity configuration in chamber, obtain amplification channel position and multiplication factor stabilization and can be real-time The local image intensifer of Independent adjustable；

Once the unordered factor determines, the reflectance factor of the reflector in gain reflection device-cavity configuration, the optical thickness in chamber, The gain in reflector and chamber also mutually should determine that；

Gain reflection device-the cavity configuration includes N+1 reflector (R₁,R₂,…,R_N+1) and N number of chamber (C₁,C₂,…,C_N), All N+1 reflector (R₁,R₂,…,R_N+1) and N number of chamber (C₁,C₂,…,C_N) on can have gain, as shown in Figure 1；

Flashlight can enter gain reflection device-cavity configuration from left side, then be reflected through or from left side from right side, right side Be referred to as right transmission multiplication factor through signal light power and the ratio of left incoming signal luminous power, left side reflected signal luminous power with The ratio of left incoming signal luminous power is referred to as left reflection multiplication factor；Flashlight can also enter gain reflection device-chamber from right side Structure, then reflects from left side through or from right side, and left side claims through signal light power with the ratio of right incoming signal luminous power It is left transmission multiplication factor, right side reflected signal luminous power is referred to as right reflection times magnification with the ratio of right incoming signal luminous power Number.The right transmission multiplication factor of same gain reflection device-cavity configuration is identical with left transmission multiplication factor, is referred to as through amplification Multiple, and its left reflection multiplication factor and right reflection multiplication factor are then general different.

Gain reflection device-cavity configuration at least includes two kinds of physics of gain layered medium or gain fibre Bragg grating array Way of realization, gain layered medium (as shown in Figure 2) and gain fibre Bragg grating array (as shown in Figure 3).Light incides increasing When beneficial layered medium or gain fibre Bragg grating array, it is 1 to set monochromatic incident intensity.

For layered medium, medium interface as reflector dielectric layer as chamber；For optical fiber Bragg raster array, , used as reflector, fiber segment is used as chamber for optical fiber Bragg raster.

For layered medium, medium interface is used as reflector, reflector R_iReflectance factor be r_i=(n_i-1-n_i)/(n_i-1+ n_i), wherein n_i-1It is in the i-th -1 layer refractive index of medium, n_iIt is i-th layer of refractive index of medium；Dielectric layer is used as chamber, chamber C_i's Optical thickness is l_i=n_id_i, wherein d_iIt is thickness.The unordered factor of reflector changes the change corresponding to medium refraction index, chamber The unordered factor change the change of the optical thickness corresponding to dielectric layer, the change of the unordered factor of gain is corresponding to pumping condition Change.

For the gain layered medium (when the unordered factor is 1) of local optical amplifier design：It is 2.1 by 50 layers of refractive index Or 1.4 alternating dielectric layers are constituted, the gain of medium interface is all set to 0 (because medium interface does not have physical thickness), dielectric layer Gain is all set to 10^-6/ nm, the air (refractive index is 1) that surrounding medium is set as, designed central wavelength is λ₀=1550nm, often The optical thickness of individual dielectric layer is λ₀/4.The unordered Compensation Design local image intensifer in chamber based on gain layered medium is provided 5 design examples.Fig. 4 is the unordered factor of the unordered Compensation Design local image intensifer in chamber based on gain layered medium, Fig. 5 bases In the transmission amplification channel and multiple of the unordered Compensation Design local image intensifer in the chamber of gain layered medium, Fig. 6 is based on gain point The left reflection amplification channel and multiple of the unordered Compensation Design local image intensifer in chamber of layer medium, Fig. 7 are based on gain layered medium The unordered Compensation Design local image intensifer in chamber right reflection amplification channel and multiple.

Design 1-5's sets operating spectral range as 1400-1700nm.Design 1 is chamber disordered structure, and its reflector is orderly It is orderly with gain.It is unordered that the unordered compensation of design 2-5 transit chambers further changes the chamber that has of design 1.

Design 1 has 2 and passes through amplification channel, and its position is 1500nm and 1600nm, and its multiplication factor is 73.6 Hes 75.3；Design 1 has 2 left reflection amplification channels that amplification channel position consistency is passed through with it, and its multiplication factor is 95.6 Hes 34.8, and 2 right reflection amplification channels that amplification channel position consistency is passed through with it, its multiplication factor is 33.9 and 98.2；

Design 2 has 1 and passes through amplification channel, and its position is 1500nm, and its multiplication factor is 140.9；Design 2 has 1 The individual left reflection amplification channel that amplification channel position consistency is passed through with it, its multiplication factor is 187.4, and 1 pass through with it The right reflection amplification channel of amplification channel position consistency, its multiplication factor is 73.7；

Design 3 has 1 and passes through amplification channel, and its position is 1600nm, and its multiplication factor is 170.1；Design 3 has 1 The individual left reflection channel that amplification channel position consistency is passed through with it, its multiplication factor is 84.8, and 1 logical through amplifying with it The right reflection amplification channel of road position consistency, its multiplication factor is 245.1；

There is 0 to pass through amplification channel, 0 left reflection amplification channel and 0 right reflection amplification channel for design 4；

Design 5 has 2 and passes through amplification channel, and its position is 1500nm and 1615nm, and its multiplication factor is 166.0 Hes 107.5；Design 5 has 2 left reflection channels that amplification channel position consistency is passed through with it, and its multiplication factor is 447.3 Hes 70.6, and 2 right reflection amplification channels that amplification channel position consistency is passed through with it, its multiplication factor is 69.7 and 109.3；

The unordered compensation of transit chamber, from design 1 to design 2, the position of amplification channel 1 is constant and amplification channel 2 is closed；From setting To design 3, amplification channel 1 is closed meter 1 and the position of amplification channel 2 is constant is closed；From design 1 to design 4, amplification channel 1 All it is closed with amplification channel 2；From design 1 to design 5, the position of amplification channel 1 is constant and the position of amplification channel 2 is moved from 1600nm Move 1615nm.

From designing 1-5, when gain layered medium is used as local image intensifer, always has and pass through channel position one with it The left reflection amplification channel and right reflection amplification channel for causing.Below in the unordered compensation of reflector and the unordered Compensation Design local of gain Image intensifer constantly, only discusses transmission amplification channel.

The unordered compensation of reflector based on gain layered medium provides 5 design examples.Fig. 8 is to be layered to be situated between based on gain The unordered factor of the unordered Compensation Design local image intensifer of reflector of matter, Fig. 9 be the reflector based on gain layered medium without The transmission amplification channel and multiple of sequence Compensation Design local image intensifer.

Design 1 sets operating spectral range as 1400-1700nm with design 6-9's.Design 1 is chamber disordered structure, and its is anti- Emitter is in order and gain is orderly.It is orderly that design 6-9 changes the reflector that has of design 1 by the unordered compensation of reflector.

Design 1 has 2 and passes through amplification channel, and its position is 1500nm and 1600nm, and its multiplication factor is 73.6 Hes 75.3；

Design 6 has 1 and passes through amplification channel, and its position is 1500nm, and its multiplication factor is 6920.1；

Design 7 has 1 and passes through amplification channel, and its position is 1600nm, and its multiplication factor is 4737.6；

Design 8 has 0 and passes through amplification channel；

Design 9 has 2 and passes through amplification channel, and its position is 1485nm and 1600nm, and its multiplication factor is 89.0 Hes 89.2；

By the unordered compensation of reflector, from design 1 to design 6, the position of amplification channel 1 is constant and amplification channel 2 is closed； From design 1 to design 7, amplification channel 1 is closed and the position of amplification channel 2 is constant is closed；From design 1 to design 8, amplify logical Road 1 and amplification channel 2 are all closed；From design 1 to design 9, the position of amplification channel 1 moves to 1485nm and amplifies from 1500nm The position of passage 2 is constant.

The unordered Compensation Design local image intensifer of gain based on layered medium provides 4 design examples.Figure 10 is base In the unordered factor of gain of the unordered Compensation Design local image intensifer of the reflector of layered medium, Figure 11 is based on layered medium The transmission amplification channel and multiple of the unordered Compensation Design local image intensifer of reflector.

Design 1 sets operating spectral range as 1400-1700nm with design 10-12's.Design 1 is chamber disordered structure, its Reflector is in order and gain is orderly.It is orderly that design 10-12 changes the gain that has of design 1 by the unordered compensation of gain.

Design 10 has 1 and passes through amplification channel, and its position is 1500nm, and its multiplication factor is 50157.8；

Design 11 has 1 and passes through amplification channel, and its position is 1600nm, and its multiplication factor is 10007.9；

Design 12 has 0 and passes through amplification channel；

By the unordered compensation of gain, from design 1 to design 10, the position of amplification channel 1 is constant and amplification channel 2 is closed； From design 1 to design 11, amplification channel 1 is closed and the position of amplification channel 2 is constant is closed；From design 1 to design 12, amplify Passage 1 and amplification channel 2 are all closed；The unordered compensation of gain can not realize the change of channel position.

For optical fiber Bragg raster array, optical fiber Bragg raster is used as reflector, reflector R_iReflectance factor be r_i =-tanh (| q_i|Δ_i)q_i ^*/|q_i|, wherein q_i=η π Δs n_iexp(iθ_i)/λ₀It is complex coupling coefficient, Δ n_iIt is refraction index changing, θ_iIt is phase, λ₀It is Bragg wavelength, Δ_iIt is length；Fiber segment is used as chamber, chamber C_iOptical thickness be l_i=n_effd_i, wherein n_effIt is the effective refractive index of optical fiber, d_iIt is thickness.Length of the change of the unordered factor of reflector corresponding to optical fiber Bragg raster Degree changes, and the change of the unordered factor in chamber corresponds to the change of the optical thickness of fiber segment, the change correspondence of the unordered factor of gain In the change of pumping condition.

For the optical fiber Bragg raster array (when the unordered factor is 1) of local optical amplifier design：By 20 optical fiber Bragg gratings are constituted, and centre is separated by 19 fiber segments.The parameter of single optical fiber Bragg raster：Optical fiber effective refractive index is 1.446, refraction index changing is 10^-4, phase is 0, Bragg wavelength 1550nm, length 3mm；Optical fiber Bragg raster and fiber segment Gain is all set to 10^-9/nm.Designed central wavelength is λ₀=1550nm, the optical thickness of each fiber segment is λ₀/2。

It is real that the unordered Compensation Design local image intensifer in chamber based on gain fibre Bragg grating array provides 5 designs Example.Figure 12 is the unordered factor of the unordered Compensation Design local image intensifer in chamber based on gain fibre Bragg grating array, Figure 13 The transmission amplification channel and multiple of the unordered Compensation Design local image intensifer in chamber based on gain fibre Bragg grating array, figure The left reflection amplification channel and again of the 14 unordered Compensation Design local image intensifers in chamber based on gain fibre Bragg grating array Number, Figure 15 is based on the right reflection amplification channel of the unordered Compensation Design local image intensifer in chamber of gain fibre Bragg grating array And multiple.

Design 13-17's sets operating spectral range as 1549.95-1550.05nm.Design 13 is chamber disordered structure, its Reflector is in order and gain is orderly.It is unordered that the unordered compensation of design 14-17 transit chambers further changes the chamber that has of design 1.

Design 13 has 2 and passes through amplification channel, and its position is 1549.98nm and 1550.02nm, and its multiplication factor is 134.1 and 126.5；Design 13 has 2 left reflection amplification channels that amplification channel position consistency is passed through with it, its multiplication factor It is 47.2 and 483.4, and 2 right reflection amplification channels that amplification channel position consistency is passed through with it, its multiplication factor is 571.2 and 48.5；

Design 14 has 1 and passes through amplification channel, and its position is 1549.98nm, and its multiplication factor is 1554.3；Design 14 With 1 left reflection amplification channel that amplification channel position consistency is passed through with it, its multiplication factor is 392.1, and 1 and its Through the right reflection amplification channel of amplification channel position consistency, its multiplication factor is 7008.1；

Design 15 has 1 and passes through amplification channel, and its position is 1550.02nm, and its multiplication factor is 875.3；Design 15 With 1 left reflection channel that amplification channel position consistency is passed through with it, its multiplication factor is 3312.1, and 1 saturating with it The right reflection amplification channel of amplification channel position consistency is crossed, its multiplication factor is 272.7；

There is 0 to pass through amplification channel, 0 left reflection amplification channel and 0 right reflection amplification channel for design 16；

Design 17 has 2 and passes through amplification channel, and its position is 1549.98nm and 1550.03nm, and its multiplication factor is 476.7 and 465.7；Design 17 has 2 left reflection channels that amplification channel position consistency is passed through with it, and its multiplication factor is 131.1 and 1607.9, and 2 right reflection amplification channels that amplification channel position consistency is passed through with it, its multiplication factor is 2165.5 with 154.5；

The unordered compensation of transit chamber, from design 13 to design 14, the position of amplification channel 1 is constant and amplification channel 2 is closed；From To design 15, amplification channel 1 is closed and the position of amplification channel 2 is constant is closed for design 13；From design 13 to design 16, amplify Passage 1 and amplification channel 2 are all closed；From design 13 to design 17, the position of amplification channel 1 is constant and the position of amplification channel 2 from 1550.02nm move to 1550.03nm.

From designing 13-17, when gain fibre Bragg grating array is used as local image intensifer, always have saturating with it Cross channel position consistent left reflection amplification channel and right reflection amplification channel.It is unordered in the unordered compensation of reflector and gain below Compensation Design local image intensifer constantly, only discusses transmission amplification channel.

The unordered compensation of reflector based on gain fibre Bragg grating array provides 5 design examples.Figure 17 be based on The unordered factor of the unordered Compensation Design local image intensifer of reflector of gain fibre Bragg grating array, Figure 18 is based on increasing The transmission amplification channel and multiple of the unordered Compensation Design local image intensifer of reflector of beneficial optical fiber Bragg raster array.

Design 13 sets operating spectral range as 1549.95-1550.05nm with design 18-21's.Design 13 is that chamber is unordered Structure, its reflector is in order and gain is orderly.Design 18-21 changes the reflection that design 1 has by the unordered compensation of reflector Device is orderly.

Design 13 has 2 and passes through amplification channel, and its position is 1549.98nm and 1550.02nm, and its multiplication factor is 134.1 and 126.5；

Design 18 has 1 and passes through amplification channel, and its position is 1549.98nm, and its multiplication factor is 891.1；

Design 19 has 1 and passes through amplification channel, and its position is 1550.02nm, and its multiplication factor is 807.3；

There is 0 to pass through amplification channel, 0 left reflection amplification channel and 0 right reflection amplification channel for design 20；

Design 21 has 2 and passes through amplification channel, and its position is 1549.98nm and 1550.01nm, and its multiplication factor is 879.0 and 604.0；

By the unordered compensation of reflector, from design 13 to design 18, the position of amplification channel 1 is constant and amplification channel 2 is closed Close；From design 13 to design 19, amplification channel 1 is closed and the position of amplification channel 2 is constant is closed；From design 13 to design 20, amplification channel 1 and amplification channel 2 are all closed；From design 13 to design 21, the position of amplification channel 1 is constant and amplification channel 2 Position moves to 1550.01nm from 1550.02nm.

The unordered Compensation Design local image intensifer of gain based on gain fibre Bragg grating array provides 4 designs Example.Figure 18 be the unordered Compensation Design local image intensifer of reflector based on gain fibre Bragg grating array gain without The sequence factor, Figure 19 is the transmission of the unordered Compensation Design local image intensifer of reflector based on gain fibre Bragg grating array Amplification channel and multiple.

Design 13 sets operating spectral range as 1549.95-1550.05nm with design 22-24's.Design 13 is that chamber is unordered Structure, its reflector is in order and gain is orderly.The gain that design 22-24 changes design 1 and has by the unordered compensation of gain has Sequence.

Design 22 has 1 and passes through amplification channel, and its position is 1549.98nm, and its multiplication factor is 3571.5；

Design 23 has 1 and passes through amplification channel, and its position is 1550.02nm, and its multiplication factor is 907.5；

There is 0 to pass through amplification channel, 0 left reflection amplification channel and 0 right reflection amplification channel for design 24；

By the unordered compensation of gain, from design 13 to design 22, the position of amplification channel 1 is constant and amplification channel 2 is closed； From design 13 to design 23, amplification channel 1 is closed and the position of amplification channel 2 is constant is closed；From design 13 to design 24, put Big passage 1 and amplification channel 2 are all closed；The unordered compensation of gain can not realize the movement of channel position.

In sum, when gain reflection device-cavity configuration is used as local image intensifer, its amplification channel and multiple are for tool Body reflectron parameters, chamber parameter and gain parameter are all very sensitive, the steady operation of local image intensifer need to reflector without Sequence and/or chamber is unordered and/or gain is unordered compensates；In addition, and/or chamber unordered to reflector is unordered and/or gain is unordered The independent real-time control that can realize amplification channel and multiple is compensated, the real needs of different field can be effectively met.

Bibliography

1.S.E.Skipetrov,"Nonlinear optics:Disorder is the new order,"Nature 432,285(2004).

2.P.W.Anderson,"Absence of Diffusion in Certain Random Lattices," Physical Review 109,1492(1958).

3.M.F.Limonov,and M.Richard,Optical properties of photonic structures:interplay of order and disorder(CRC press,2012).

4.V.Milner,and A.Z.Genack,"Photon Localization Laser:Low-Threshold Lasing in a Random Amplifying Layered Medium via Wave Localization,"Phys Rev Lett 94,073901(2005).

5.Y.Wu,K.D.Singer,R.G.Petschek,et al.,"Mode delocalization in 1D photonic crystal lasers,"Opt Express 17,18038(2009).

6.Y.Bliokh,E.I.Chaikina,N.Lizárraga,et al.,"Disorder-induced cavities,resonances,and lasing in randomly layered media,"Physical Review B 86,054204(2012).

7.M.Gagné,and R.Kashyap,"Random fiber Bragg grating Raman fiber laser,"Opt Lett 39,2755(2014).

Claims

It is 1. a kind of based on unordered multichannel local image intensifer, it is characterised in that based on gain reflection device-cavity configuration, The unordered factor of adjust gain reflector-cavity configuration is to change the channel strength factor and separation factor, so that it is determined that reflector The optical thickness and/or reflector and the gain in chamber in reflectance factor and/or chamber, obtain amplify stabilization and can Independent adjustable local Image intensifer；

Gain reflection device-the cavity configuration includes N+1 reflector (R₁,R₂,…,R_N+1) and N number of chamber (C₁,C₂,…,C_N), own N+1 reflector (R₁,R₂,…,R_N+1) and N number of chamber (C₁,C₂,…,C_N) on can have gain；

Wherein, the unordered factor of the gain reflection device-cavity configuration includes the unordered factor (α of reflector₁,α₂,…,α_N+1), chamber The unordered factor (β₁,β₂,…,β_N) and reflector and chamber the unordered factor (A of gain₁,A₂,…,A_2N+1)：

$(α_{1}, α_{2}, ..., α_{N + 1}) = (r_{1} / r_{1}^{o}, r_{2} / r_{2}^{o}, ..., r_{N + 1} / r_{N + 1}^{o})$

$(β_{1}, β_{2}, ..., β_{N}) = (l_{1} / l_{1}^{o}, l_{2} / l_{2}^{o}, ..., l_{N} / l_{N}^{o})$

$(A_{1}, A_{2}, ..., A_{2 N + 1}) = (g_{1} / g_{1}^{o}, g_{2} / g_{2}^{o}, ..., g_{2 N + 1} / g_{2 N + 1}^{o})$

(r₁,r₂,…,r_N+1) it is respectively the having from left to right of each reflector in gain reflection device-cavity configuration Sequence and unordered reflectance factor,(l₁,l₂,…,l_N) be respectively in gain reflection device-cavity configuration each chamber from a left side to Right orderly and disordered optical thickness, (g₁,g₂,…,g_2N+1) andRespectively gain reflection device-cavity configuration In the orderly and unordered gain from left to right of each reflector and chamber.
2. it is according to claim 1 based on unordered multichannel local image intensifer, it is characterised in that the amplification stabilization And can be in the local image intensifer of Independent adjustable, the separation factor and intensity of local image intensifer channel wavelength and the outer wavelength of passage The factor meets following condition：

The separation factor of local image intensifer channel wavelength is less than 10^-3, intensity factor is more than 50；

The separation factor of the outer wavelength of local image intensifer passage is more than 10^-2And intensity factor is less than 20；

Wherein, λ₀It is designed central wavelength；For the outer wavelength X of any channel wavelength or passage of local image intensifer_j, f_dev(λ_j) It is separation factor, f_int(λ_j) it is intensity factor；

$\{\begin{matrix} f_{d e v} (λ_{j}) = \underset{S}{Σ} Δ \tilde{I} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) / (2 N + 2) \\ f_{i n t} (λ_{j}) = m a x [I_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) + I_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j})] / 2 \end{matrix}$

(S₁,S₂,…,S_2N+2) it is each slotted-type reflector surface in local image intensifer from left to right；

$Δ \tilde{I} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) = | {\tilde{I}}_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) - {\tilde{I}}_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) |$

${\tilde{I}}_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) = I_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) / m a x [I_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j})]$

${\tilde{I}}_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) = I_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) / m a x [I_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j})]$

It is the intensity separating degree in each face when light is left incident and reflector-cavity configuration is incided on the right side, I_L (S₁,S₂,…S_2N+2；λ_j) andEach face when respectively light incides reflector-cavity configuration from a left side Intensity and normalized intensity, I_R(S₁,S₂,…S_2N+2；λ_j) andRespectively light incides reflection from the right side The intensity and normalized intensity in each face during device-cavity configuration；

Refer to that the intensity in left incident and right each face when inciding reflector-cavity configuration of light is separated The sum of degree；

max[I_L(S₁,S₂,…S_2N+2；λ_j)] refer to maximum strong in each surface intensity when light incides reflector-cavity configuration from a left side Degree；

max[I_R(S₁,S₂,…S_2N+2；λ_j)] refer to maximum intensity when light incides reflector-cavity configuration from the right side in each face；

max[I_L(S₁,S₂,…S_2N+2；λ_j)+I_R(S₁,S₂,…S_2N+2；λ_j)] refer to light each when inciding reflector-cavity configuration from a left side Maximum intensity when individual surface intensity incides reflector-cavity configuration plus light from the right side in each surface intensity；

The intensity and transmitance of the reflector-cavity configuration are calculated using coupling mode equations or transmission matrix and obtained.
3. it is according to claim 2 based on unordered multichannel local image intensifer, it is characterised in that the local light is put The separation factor of big device channel wavelength is less than 10^-3, intensity factor is more than 50, refers to dividing for all channel wavelengths of local image intensifer 10 are both less than from the factor^-3, intensity factor is both greater than 50；

The separation factor of the outer wavelength of the local image intensifer passage is more than 10^-2, intensity factor is less than 20, refers to local light amplification The separation factor of the outer wavelength of all passages of device is both greater than 10^-2, intensity factor is both less than 20.
4. according to claim any one of 1-3 based on unordered multichannel local image intensifer, it is characterised in that it is described Gain reflection device-cavity configuration at least includes gain layered medium or gain fibre Bragg grating array；

The gain layered media refers to that medium interface is reflector, and dielectric layer is chamber, and gain puts on dielectric layer；

The gain fibre Bragg grating array refers to that optical fiber Bragg raster is reflector, and fiber segment is chamber, and gain puts on Optical fiber Bragg raster or fiber segment.
5. it is according to claim 1 based on unordered multichannel local image intensifer, it is characterised in that the gain reflection The gain of the local image intensifer of device-cavity configuration is provided by optical pumping or electric pump, pump mode at least include end pumping or Profile pump.
6. it is according to claim 1 based on unordered multichannel local image intensifer, it is characterised in that the gain reflection The gain of the local image intensifer of device-cavity configuration refers to that amplification of the pumping to light subtracts quiet gain of the material to the absorption of light.
7. it is according to claim 1 based on unordered multichannel local image intensifer, it is characterised in that the gain reflection The unordered compensation of the local image intensifer of device-cavity configuration includes the unordered compensation of the unordered compensation of reflector, chamber and the unordered compensation of gain, The wherein unordered compensation of the unordered compensation of reflector and chamber realized by applying external action to gain reflection device-cavity configuration, gain without Sequence compensation is realized by changing the pumping condition to gain reflection device-cavity configuration.
8. it is according to claim 1 based on unordered multichannel local image intensifer, it is characterised in that the gain reflection The local image intensifer of device-cavity configuration is made of the material with any absorptivity, and overall gain is more than 0, the overall gain Refer to that pumping is amplified more than overall absorption of the material to light for making local image intensifer to the overall of light more than 0.
9. a kind of compensation method based on unordered multichannel local image intensifer, it is characterised in that to described in claim 1 Unordered compensation, including following steps are carried out based on unordered multichannel local image intensifer：

Step 1：Obtain the unordered factor of gain reflection device-cavity configuration；

The unordered factor includes reflectance factor, the gain of the unordered factor and reflector and chamber of the optical thickness in chamber of reflector The unordered factor；

Step 2：In the case where the current unordered factor is set, all channel wavelengths and the outer wavelength X of passage in local image intensifer are calculated_j's Separation factor f_dev(λ_j) and intensity factor f_int(λ_j)；

$\{\begin{matrix} f_{d e v} (λ_{j}) = \underset{S}{Σ} Δ \tilde{I} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) / (2 N + 2) \\ f_{i n t} (λ_{j}) = m a x [I_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) + I_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j})] / 2 \end{matrix}$

(S₁,S₂,…,S_2N+2) it is each slotted-type reflector surface in local image intensifer from left to right；

$Δ \tilde{I} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) = | {\tilde{I}}_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) - {\tilde{I}}_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) |$

${\tilde{I}}_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) = I_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{i}) / m a x [I_{L} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j})]$

${\tilde{I}}_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) = I_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j}) / m a x [I_{R} (S_{1}, S_{2}, ... S_{2 N + 2}; λ_{j})]$

It is the intensity separating degree in each face when light is left incident and reflector-cavity configuration is incided on the right side, I_L (S₁,S₂,…S_2N+2；λ_j) andEach face when respectively light incides reflector-cavity configuration from a left side Intensity and normalized intensity, I_R(S₁,S₂,…S_2N+2；λ_j) andRespectively light incides reflection from the right side The intensity and normalized intensity in each face during device-cavity configuration；

Refer to that the intensity in left incident and right each face when inciding reflector-cavity configuration of light is separated The sum of degree；

max[I_L(S₁,S₂,…S_2N+2；λ_j)] refer to maximum strong in each surface intensity when light incides reflector-cavity configuration from a left side Degree；

max[I_R(S₁,S₂,…S_2N+2；λ_j)] refer to maximum intensity when light incides reflector-cavity configuration from the right side in each face；

max[I_L(S₁,S₂,…S_2N+2；λ_j)+I_R(S₁,S₂,…S_2N+2；λ_j)] refer to light each when inciding reflector-cavity configuration from a left side Maximum intensity when individual surface intensity incides reflector-cavity configuration plus light from the right side in each surface intensity；

The intensity of the gain reflection device-cavity configuration is calculated using coupling mode equations or transmission matrix and obtained；

Step 3：In the case where the current unordered factor is set, judge whether to meet condition set by following criterion 1, if meeting, currently without The sequence factor sets the unordered factor needed for being local image intensifer, and adjusting and optimizing process terminates, if it is not satisfied, continuing step 4：

Criterion 1：Using the channel separation factor and intensity factor as judge index, the separation factor of all passage corresponding wavelengths is all small In 10^-350 are both greater than with intensity factor, while the separation factor of the outer wavelength of all passages is both greater than 10^-2It is all small with intensity factor In 20；

Step 4：Readjust the unordered factor of gain reflection device-cavity configuration；

Step 5：Under the unordered factor after the adjustment is set, recalculate in local image intensifer outside all channel wavelengths and passage Wavelength X_jSeparation factor f_dev(λ_j) and intensity factor f_int(λ_j)；

Step 6：Judge adjustment after the unordered factor whether meet criterion 2, if meet, by adjustment after the unordered factor set make It is the basis of unordered factor adjustment next time, return to step 3；If it is not satisfied, then by adjustment before the unordered factor be provided as down The basis that once the unordered factor is adjusted, return to step 4：

Criterion 2：Smaller and intensity factor is all bigger compared with before adjusting before the separation factor of all channel wavelengths is all relatively adjusted, while institute Bigger and intensity factor is smaller before all relatively adjusting before the separation factor for having the outer wavelength of passage is all relatively adjusted.
10. method according to claim 9, it is characterised in that be based on unordered multichannel local image intensifer in design When, amplification mode includes three kinds：Transmission is amplified, left reflection is amplified and right reflection amplifies 3 kinds；

Wherein, transmission amplification refers to light incident from local image intensifer left side or right side；

Left reflection amplification refers to light incident from local image intensifer left side；

Right reflection amplification refers to light incident from local image intensifer right side.