CN109787072A - Multi-carrier optical signal generating device and method based on doping echo squash - Google Patents
Multi-carrier optical signal generating device and method based on doping echo squash Download PDFInfo
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Abstract
The invention discloses a kind of multi-carrier optical signal generating devices based on doping echo squash, including light-pulse generator, pump light source, doping echo squash, the first micro-nano fiber, the second micro-nano fiber；The doping echo squash is arranged between the first micro-nano fiber and the optical signal iteration portion of the second micro-nano fiber, it is alternately made of M photonic crystal waveguide and M parameter waveguide, the parametric process of the photonic crystal waveguide is the positive parametric process for exciting number of carrier wave, and the parametric process of the parameter waveguide is the reversed parametric process for amplifying carrier-signal amplitude.The present invention can optimize on the basis of generating multicarrier light source using four-wave mixing, many reference amounts process is subjected to Mixed cascading, it can effectively improve multicarrier quantity, reduce noise, promotion is brought to Transmission system performance, reduces the bit error rate, improves band efficiency and transmission range, and the order of modulation of signal can not be changed with flexible allocation bandwidth.
Description
Technical field
The present invention relates to multi-carrier transmission technical fields, in particular to a kind of multicarrier based on doping echo squash
Optical signal generating apparatus and method.
Background technique
Communication network and Internet service were continuously increased in recent years, and requirement of the people to network capacity and bandwidth is increasingly
Height, these have promoted many scholars to conduct a research the optical communication system of Tb/s and the above rate.Signal is modulated to frequency respectively
It on the light carrier of rate locking, is transmitted using multi-wavelength, is the effective means for realizing vast capacity transmission.
The overloading wavelength light source of Frequency Locking is the basis for realizing multi-wavelength high capacity transmission.Currently, generating multi-carrier light
The method in source mainly has: based on the circulation overloading wave producer of frequency shifter, super continuous spectrums cutting techniques, based on the overloading of modulator
Wave lift-off technology is based on the modulation multi-mode lasers such as Fabry Perot laser light source or mode-locked laser light source light source technology and base
In the frequency comb generator etc. of on piece microcavity.
The method of all of above multi-carrier optical signal suffers from the limitation of oneself, and the multi-carrier light of frequency of use locking
The hyperchannel system in source can not only reduce required number of lasers, but also due to, without opposite frequency drift, going back between subcarrier
Protection interval can be removed completely, system is made to reach higher spectrum efficiency.Meanwhile utilizing frequency or PGC demodulation multicarrier
Light source, can be balanced into united DSP between the receiver of multiple synchronizations, such as compensating for frequency offset, phase noise and non-linear estimates
Meter etc., to obtain better portfolio effect.
The multicarrier light source generated at present by four-wave mixing effect is relatively conventional, but this mode will appear some ask
Topic, carrier number increase the reduction that will lead to power, once when power is lower than four-wave mixing threshold value, can not just cascade further
New carrier wave is excited, so the carrier number generated will receive the low limitation of optical power.Although being amplified using erbium-doped fiber
Device can amplify carrier wave, continue to excite new carrier wave with four-wave mixing effect, but what this amplification mode generated
Noise is more, causes the carrier-to-noise ratio of light source too low.Therefore, generating ultralow din-light multicarrier source is in the urgent need to address at present ask
Topic.
Summary of the invention
It is an object of that present invention to provide it is a kind of based on doping echo squash multi-carrier optical signal generating device and method,
It is optimized on the basis of generating multicarrier light source using four-wave mixing, many reference amounts process is subjected to Mixed cascading, it can be effective
Multicarrier quantity is improved, noise is reduced, promotion is brought to Transmission system performance, reduces the bit error rate, improve band efficiency and biography
Defeated distance, and can not change the order of modulation of signal with flexible allocation bandwidth.Meanwhile the four-wave mixing process of signal with
Many reference amounts process by doping echo squash come it is accomplished, using this patent proposition doping echo squash can effectively subtract
The volume of small multicarrier light source, so that communication system is more integrated.
To reach above-mentioned purpose, in conjunction with Fig. 1, the present invention proposes a kind of multi-carrier optical signal hair based on doping echo squash
Generating apparatus, described device include light-pulse generator, pump light source, doping echo squash, the first micro-nano fiber, the second micro-nano fiber.
First micro-nano fiber and the second micro-nano fiber are arranged in parallel, and the first micro-nano fiber and the second micro-nano fiber wrap
Include sequentially connected optical signal input unit, optical signal iteration portion, optical signal output section, wherein optical signal input unit, optical signal are defeated
It is enclosed with covering on the outside of the core layer in portion out, the core layer in optical signal iteration portion is exposed.
Since the core layer in optical signal iteration portion is exposed, incident light can be gone out by this segment core layer diffraction.
First micro-nano fiber is provided with first end face and second end face, the pump light source along its fibre core extending direction
It is arranged at the first end face of the first micro-nano fiber, the pump light that pump light source is launched enters the first micro-nano by first end face
Optical fiber is transmitted to second end face along the first micro-nano fiber.
Second micro-nano fiber is provided with third end face and the 4th end face, the light-pulse generator along its fibre core extending direction
The third endface of second micro-nano fiber is set, and the pulsed light that light-pulse generator is launched enters the second micro-nano by third end face
Optical fiber is transmitted to the 4th end face along the second micro-nano fiber.
The pump light is consistent with the transmission direction of pulsed light.
The doping echo squash is arranged between the first micro-nano fiber and the optical signal iteration portion of the second micro-nano fiber,
It is alternately made of M photonic crystal waveguide and M parameter waveguide, and the parametric process of the photonic crystal waveguide is for exciting
The positive parametric process of number of carrier wave, the parametric process of the parameter waveguide are the reversed parameter for amplifying carrier-signal amplitude
Process.
In conjunction with Fig. 2, the doping echo squash includes 4 photonic crystal waveguides being arranged alternately and 4 parameter waveguides.Such as
Shown in Fig. 2, which is made of the part of eight same sizes, and bright gray parts are photonic crystal waveguide, and dark gray section is
Parameter waveguide, general multi-carrier optical signal are mainly to carry out successive ignition by four-wave mixing to generate, and the application is logical
Cross the process that doping echo squash is added to realize successive ignition.
Preferably, for the photonic crystal waveguide using double zero dispersion fibre-optic waveguides, the parameter waveguide is flat using negative dispersion
Smooth fibre-optic waveguide.
In some instances, the photonic crystal waveguide is made of highly-nonlinear material.
In conjunction with Fig. 3, the photonic crystal waveguide meets following conditions:
Frequency is ω1And ω2Two-beam under conditions of meeting phase matched, be injected into photonic crystal waveguide, will send out
Raw forward direction parametric process, it is ω that frequency, which can be obtained,3Stokes wave and frequency be ω4Anti-Stokes wave, they meet with
Lower linear coupled wave equation:
Wherein, θ=[Δ k-3 γ (P1+P2)] z, Δ k is phase mismatch, and γ is nonlinear factor, P1And P2Be respectively into
Signal light power is penetrated, z is transmission range.
In conjunction with Fig. 4, the pump light transmitted in the first micro-nano fiber enters in exposed fibre core section and mixes as pulsed light
In miscellaneous echo squash.Pulsed light and pump light after carrying out four-wave mixing are in contact in parameter fiber section and can generate reversed parameter
Process occurs energy transfer, increases optical signal magnitude.
The side that the doping echo squash closes on the second micro-nano fiber is provided with power threshold, adulterates big in echo squash
Doping Echo Wall outer surface of ball, which is disposed across, in the optical signal of power threshold enters the second micro-nano fiber.
Optical signal is issued from light-pulse generator, is transmitted by optical fiber, when being transmitted to optical fiber and microballoon interface, due to interface
The covering of place's optical fiber is stripped, the light field for the diffraction that can shed outward when optical signal transmits in exposed fibre core.
Pulsed light will do it multiple reflections after entering in doping echo squash, when pulsed light is in photonic crystal in sphere
When part, it may occur that four-wave mixing generates the salty frequency light of multi beam, then by being reflected into parameter fiber section.In upper road optical fiber
The pump light of transmission enters in microballoon as pulsed light in exposed fibre core section.Pulsed light and pump after carrying out four-wave mixing
Pu light is in contact in parameter fiber section can generate positive parametric process, and energy transfer occurs, increases optical signal magnitude.
Optical signal carries out multiple reflections in microballoon, every to pass through a photonic crystal waveguide and parameter waveguide, optical signal
The amplitude of carrier number and each carrier wave can be increased, and when optical signal magnitude reaches the threshold value of doping echo squash, optical signal is then
Microballoon can be launched to return in optical fiber, then receiving end we can be obtained by desired multi-carrier optical signal.
The minimum range in the optical signal iteration portion of first micro-nano fiber and the second micro-nano fiber and doping echo squash
Respectively less than set distance threshold value.
Preferably, the most narrow spacing in the optical signal iteration portion of the first micro-nano fiber and the second micro-nano fiber and doping echo squash
From being infinitely close to zero, i.e. the optical signal iteration portion of the first micro-nano fiber and the second micro-nano fiber is infinitely close to the doping Echo Wall
Ball, so that the overwhelming majority enters doping echo squash by the light field that optical signal iteration portion's diffraction comes out.Corresponding, distance is got over
Small, technology difficulty is higher, and user can select this distance value according to actual needs.For example, when the doping echo squash half
Diameter is 18 microns, when the core layer radius of first micro-nano fiber and the second micro-nano fiber is 8 microns, by the set distance
Threshold value is set as 5 microns etc..
In conjunction with Fig. 5, the present invention further mentions a kind of multi-carrier optical signal method for generation based on doping echo squash, the side
Method includes:
Echo squash is doped according to setting model, the echo squash after doping is by M photonic crystal waveguide and M
Parameter waveguide alternately forms, and the parametric process of the photonic crystal waveguide is the positive parametric process for exciting number of carrier wave,
The parametric process of the parameter waveguide is the reversed parametric process for amplifying carrier-signal amplitude.
The identical micro-nano fiber of two binding structures is chosen, is defined as the first micro-nano fiber and the second micro-nano fiber respectively,
Identical one section of optical fiber is chosen at one micro-nano fiber and the second micro-nano fiber same position, the covering of section optical fiber is chosen in removal, will
Section is chosen as corresponding optical signal iteration portion.
Pump light source is arranged at the first end face of the first micro-nano fiber, so that the pump light that pump light source is launched is logical
First end face is crossed into the first micro-nano fiber, is transmitted to second end face along the first micro-nano fiber.
Light-pulse generator is arranged in the third endface of the second micro-nano fiber, so that the pulsed light that light-pulse generator is launched is logical
Third end face is crossed into the second micro-nano fiber, is transmitted to the 4th end face along the second micro-nano fiber.
First micro-nano fiber and the second micro-nano fiber are arranged in parallel, the transmission direction one of the pump light and pulsed light
It causes.
By the echo squash after doping be arranged in the first micro-nano fiber and the second micro-nano fiber optical signal iteration portion it
Between, the optical signal iteration portion of first micro-nano fiber and the second micro-nano fiber and the minimum range of doping echo squash are respectively less than
Set distance threshold value, the structure meet following conditions:
Pulsed light is transmitted to the light iteration portion of the second micro-nano fiber along the second micro-nano fiber, and diffraction enters the Echo Wall after doping
Ball, diffraction light enters the parameter waveguide closed on through photonic crystal waveguide excitation number of carrier wave back reflection, in conjunction with the pump in parameter waveguide
Pu light carries out power amplification to the diffraction light after excitation number of carrier wave, and
If 1) optical signal power generated is greater than the power threshold of the doping post echo squash, optical signal passes through doping
Echo Wall outer surface of ball enters the second micro-nano fiber.
If 2) optical signal power generated is less than or equal to the power threshold of the doping post echo squash, optical signal is returned
Into doping echo squash, aforementioned process is repeated.
The above technical solution of the present invention, compared with existing, significant beneficial effect is:
1) present invention is by cascading different kinds of parameters process, and applied to the generation of multicarrier, the carrier number of generation is more
More, carrier-to-noise ratio is lower.
2) device volume can be effectively reduced using echo squash simultaneously.
3) in long haul transmission system, the quantity of laser can greatly be reduced using this light source, save system
Cost, and frequency is relatively stable between carrier wave.
It should be appreciated that as long as aforementioned concepts and all combinations additionally conceived described in greater detail below are at this
It can be viewed as a part of the subject matter of the disclosure in the case that the design of sample is not conflicting.In addition, required guarantor
All combinations of the theme of shield are considered as a part of the subject matter of the disclosure.
Can be more fully appreciated from the following description in conjunction with attached drawing present invention teach that the foregoing and other aspects, reality
Apply example and feature.The features and/or benefits of other additional aspects such as illustrative embodiments of the invention will be below
Description in it is obvious, or learnt in practice by the specific embodiment instructed according to the present invention.
Detailed description of the invention
Attached drawing is not intended to drawn to scale.In the accompanying drawings, identical or nearly identical group each of is shown in each figure
It can be indicated by the same numeral at part.For clarity, in each figure, not each component part is labeled.
Now, example will be passed through and the embodiments of various aspects of the invention is described in reference to the drawings, in which:
Fig. 1 is the structural schematic diagram of the multi-carrier optical signal generating device of the invention based on doping echo squash.
Fig. 2 is the structural schematic diagram of doping echo squash of the invention.
Fig. 3 is the positive parametric process schematic diagram of photonic crystal waveguide excitation number of carrier wave of the invention.
Fig. 4 is the reversed parametric process schematic diagram of parameter waveguide amplification carrier-signal amplitude of the invention.
Fig. 5 is the flow chart of the multi-carrier optical signal method for generation of the invention based on doping echo squash.
Fig. 6 is the spectrogram simulated in specific embodiments of the present invention.
Specific embodiment
In order to better understand the technical content of the present invention, special to lift specific embodiment and institute's accompanying drawings is cooperated to be described as follows.
In conjunction with Fig. 1, the present invention proposes a kind of multi-carrier optical signal generating device based on doping echo squash, described device
Including light-pulse generator, pump light source, doping echo squash 10, the first micro-nano fiber 20, the second micro-nano fiber 30.
First micro-nano fiber 20 and the second micro-nano fiber 30 are arranged in parallel, the first micro-nano fiber 20 and the second micro-nano light
Fibre 30 includes sequentially connected optical signal input unit, optical signal iteration portion (21,31), optical signal output section, wherein optical signal
It is enclosed with covering on the outside of input unit, the core layer of optical signal output section, the core layer in optical signal iteration portion (21,31) is exposed.
First micro-nano fiber 20 is provided with first end face and second end face, the pump light along its fibre core extending direction
Source is arranged at the first end face of the first micro-nano fiber 20, and the pump light that pump light source is launched enters first by first end face
Micro-nano fiber 20 is transmitted to second end face along the first micro-nano fiber 20.
Second micro-nano fiber 30 is provided with third end face and the 4th end face, the pulsed light along its fibre core extending direction
The third endface of the second micro-nano fiber 30 is arranged in source, and the pulsed light that light-pulse generator is launched enters second by third end face
Micro-nano fiber 30 is transmitted to the 4th end face along the second micro-nano fiber 30.
The pump light is consistent with the transmission direction of pulsed light.
The optical signal iteration of the first micro-nano fiber 20 and the second micro-nano fiber 30 is arranged in the doping echo squash 10
Between portion, alternately it is made of M photonic crystal waveguide 11 and M parameter waveguide 12, the parameter of the photonic crystal waveguide 11
Process is the positive parametric process for exciting number of carrier wave, and the parametric process of the parameter waveguide 12 is for amplifying carrier wave letter
The reversed parametric process of number amplitude.
The side that the doping echo squash 10 closes on the second micro-nano fiber 30 is provided with power threshold, adulterates echo squash
Optical signal in 10 greater than power threshold is disposed across doping 10 outer surface of echo squash and enters the second micro-nano fiber 30.
The optical signal iteration portion of first micro-nano fiber 20 and the second micro-nano fiber 30 and doping echo squash 10 are most
Small distance is respectively less than set distance threshold value.
A kind of system of ultralow din-light multi-carrier transmission method based on many reference amounts process Mixed cascading proposed by the present invention
Component mainly includes with lower module: light-pulse generator, pump light source, adulterates echo squash 10.
In conjunction with Fig. 5, the doping to echo squash is completed first, in accordance with model；Next processing transmission seed light source and pumping
The optical fiber of light source two-beam takes one section in two-beam fibre same position, peels off covering；Then adjustment frame is set, splicing optical fiber with
Echo squash can thus allow in most optical fiber so that the part that two-beam fibre covering is peelled off is infinitely close to microballoon
The light field that diffraction comes out enters in microballoon；It is finally exactly four-wave mixing of the optical signal in microballoon and many reference amounts process, seed light
Source diffraction enters in microballoon, into photon crystal micro-ball part, realizes four-wave mixing, then reflects into optical parameter microballoon part, make
Optical signal magnitude is amplified.When optical signal magnitude is more than the threshold value of microballoon, then it can be projected from microballoon, reenter optical fiber
Generate final spectrum.
The specific structure of micro-nano fiber and microballoon is as shown in Figure 1, it is 1551nm seed light that light-pulse generator, which issues central wavelength,
Source is amplified to 1W by EDFA, is injected into micro-nano fiber, and the seeded wavelength of optical pumping is 1520nm, optical pumping injection
Energy is 2W, 8 microns of the fiber core radius of micro-nano fiber, 18 microns of microsphere radius, in fibre core naked section, between microballoon and micro-nano fiber
Every 5 microns.For 11 part of photonic crystal waveguide in microballoon, dispersion is located at 1540nm and two positions 1555nm, is double zero
Dispersive optical fiber waveguide, for 12 part of parameter waveguide in microballoon, entirety is negative dispersion flattened fiber waveguide.Seed light source is micro-
By successive ignition in ball, it is 25GHz that carrier wave interval, which may be implemented, and number of carrier wave is greater than 50, the positive and negative 1dB of carrier power flatness
Multi-carrier optical signal
Fig. 6 is to simulate obtained spectrogram, and 30 subcarriers generated of Fig. 6 (a) display, intercarrier is divided into
12.5GHz, in this parametric process, what phase did not exactly match, therefore flatness is poor.Parameter mistake is shown in Fig. 6 (b)
Situation when phase exactly matches in journey, the sub-carrier number of generation is double, and flatness is higher.The result of simulation demonstrates one
The feasibility and good characteristic of the ultralow din-light multi-carrier transmission method of kind many reference amounts process Mixed cascading.
Various aspects with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations.
Embodiment of the disclosure need not be defined on including all aspects of the invention.It should be appreciated that a variety of designs and reality presented hereinbefore
Those of apply example, and describe in more detail below design and embodiment can in many ways in any one come it is real
It applies, this is because conception and embodiment disclosed in this invention are not limited to any embodiment.In addition, disclosed by the invention one
A little aspects can be used alone, or otherwise any appropriately combined use with disclosed by the invention.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention.Skill belonging to the present invention
Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause
This, the scope of protection of the present invention is defined by those of the claims.
Claims (10)
1. a kind of multi-carrier optical signal generating device based on doping echo squash, which is characterized in that described device includes pulse
Light source, pump light source, doping echo squash, the first micro-nano fiber, the second micro-nano fiber；
First micro-nano fiber and the second micro-nano fiber are arranged in parallel, the first micro-nano fiber and the second micro-nano fiber include according to
The optical signal input unit of secondary connection, optical signal iteration portion, optical signal output section, wherein optical signal input unit, optical signal output section
Core layer on the outside of be enclosed with covering, the core layer in optical signal iteration portion is exposed；
First micro-nano fiber is provided with first end face and second end face, the pump light source setting along its fibre core extending direction
At the first end face of the first micro-nano fiber, the pump light that pump light source is launched enters the first micro-nano light by first end face
Fibre is transmitted to second end face along the first micro-nano fiber；
Second micro-nano fiber is provided with third end face and the 4th end face, the light-pulse generator setting along its fibre core extending direction
In the third endface of the second micro-nano fiber, the pulsed light that light-pulse generator is launched enters the second micro-nano light by third end face
Fibre is transmitted to the 4th end face along the second micro-nano fiber；
The pump light is consistent with the transmission direction of pulsed light；
The doping echo squash is arranged between the first micro-nano fiber and the optical signal iteration portion of the second micro-nano fiber, by
M photonic crystal waveguide and M parameter waveguide alternately form, and the parametric process of the photonic crystal waveguide is for exciting carrier wave
The positive parametric process of quantity, the parametric process of the parameter waveguide are the reversed parameter mistake for amplifying carrier-signal amplitude
Journey；
The side that the doping echo squash closes on the second micro-nano fiber is provided with power threshold, adulterates and is greater than function in echo squash
The optical signal of rate threshold value is disposed across doping Echo Wall outer surface of ball and enters the second micro-nano fiber；
The optical signal iteration portion of first micro-nano fiber and the second micro-nano fiber and the minimum range of doping echo squash are small
In set distance threshold value.
2. the multi-carrier optical signal generating device according to claim 1 based on doping echo squash, which is characterized in that institute
Stating set distance threshold value is 5 microns.
3. the multi-carrier optical signal generating device according to claim 1 based on doping echo squash, which is characterized in that institute
Stating the doping Echo Wall radius of a ball is 18 microns.
4. the multi-carrier optical signal generating device according to claim 1 based on doping echo squash, which is characterized in that institute
The core layer radius for stating the first micro-nano fiber and the second micro-nano fiber is 8 microns.
5. the multi-carrier optical signal generating device according to claim 1 based on doping echo squash, which is characterized in that institute
Stating doping echo squash includes 4 photonic crystal waveguides being arranged alternately and 4 parameter waveguides.
6. according to claim 1 to described in 5 any one based on doping echo squash multi-carrier optical signal generating device,
It is characterized in that, the photonic crystal waveguide is using double zero dispersion fibre-optic waveguides.
7. according to claim 1 to described in 5 any one based on doping echo squash multi-carrier optical signal generating device,
It is characterized in that, the parameter waveguide uses the waveguide of negative dispersion flattened fiber.
8. according to claim 1 to described in 5 any one based on doping echo squash multi-carrier optical signal generating device,
It is characterized in that, the photonic crystal waveguide is made of highly-nonlinear material.
9. according to claim 1 to described in 5 any one based on doping echo squash multi-carrier optical signal generating device,
It is characterized in that, the photonic crystal waveguide meets following conditions:
Frequency is ω1And ω2Two-beam under conditions of meeting phase matched, be injected into photonic crystal waveguide, will occur just
To parametric process, it is ω that frequency, which can be obtained,3Stokes wave and frequency be ω4Anti-Stokes wave, they meet with offline
Property coupled wave equation:
Wherein, θ=[Δ k-3 γ (P1+P2)] z, Δ k is phase mismatch, and γ is nonlinear factor, P1And P2Respectively incoming signal
Optical power, z are transmission range.
10. a kind of multi-carrier optical signal method for generation based on doping echo squash, which is characterized in that the described method includes:
Echo squash is doped according to setting model, the echo squash after doping is by M photonic crystal waveguide and M parameter
Waveguide alternately forms, and the parametric process of the photonic crystal waveguide is the positive parametric process for exciting number of carrier wave, described
The parametric process of parameter waveguide is the reversed parametric process for amplifying carrier-signal amplitude；
The identical micro-nano fiber of two binding structures is chosen, is defined as the first micro-nano fiber and the second micro-nano fiber respectively, it is micro- first
Identical one section of optical fiber is chosen at nano fiber and the second micro-nano fiber same position, removal is chosen the covering of section optical fiber, will be chosen
Duan Zuowei corresponding optical signal iteration portion；
Pump light source is arranged at the first end face of the first micro-nano fiber, so that the pump light launched of pump light source passes through the
One end face enters the first micro-nano fiber, is transmitted to second end face along the first micro-nano fiber；
Light-pulse generator is arranged in the third endface of the second micro-nano fiber, so that the pulsed light launched of light-pulse generator passes through the
Three end faces enter the second micro-nano fiber, are transmitted to the 4th end face along the second micro-nano fiber；
First micro-nano fiber and the second micro-nano fiber are arranged in parallel, and the pump light is consistent with the transmission direction of pulsed light；
Echo squash after doping is arranged between the first micro-nano fiber and the optical signal iteration portion of the second micro-nano fiber, institute
The minimum range in the optical signal iteration portion and doping echo squash that state the first micro-nano fiber and the second micro-nano fiber, which is respectively less than, to be set
Distance threshold, the structure meet following conditions:
Pulsed light is transmitted to the light iteration portion of the second micro-nano fiber along the second micro-nano fiber, and diffraction enters the echo squash after doping,
Diffraction light enters the parameter waveguide closed on through photonic crystal waveguide excitation number of carrier wave back reflection, in conjunction with the pump light in parameter waveguide
Power amplification is carried out to the diffraction light after excitation number of carrier wave, and
If 1) optical signal power generated is greater than the power threshold of the doping post echo squash, optical signal passes through doping echo
Squash outer surface enters the second micro-nano fiber；
2) if the optical signal power generated is less than or equal to the power threshold of the doping post echo squash, optical signal, which is back to, to be mixed
In miscellaneous echo squash, aforementioned process is repeated.
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| CN110224288A (en) * | 2019-07-04 | 2019-09-10 | 南京信息工程大学 | A kind of 2 based on pyramid chamber μm Gao Zhongying tunable single frequency solid state laser device |
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