CN103650386B - A kind of device strengthening extinction ratio and optical sender, photoreceiver, optical module - Google Patents
A kind of device strengthening extinction ratio and optical sender, photoreceiver, optical module Download PDFInfo
- Publication number
- CN103650386B CN103650386B CN201380000719.9A CN201380000719A CN103650386B CN 103650386 B CN103650386 B CN 103650386B CN 201380000719 A CN201380000719 A CN 201380000719A CN 103650386 B CN103650386 B CN 103650386B
- Authority
- CN
- China
- Prior art keywords
- absorption effect
- saturable absorption
- extinction ratio
- energy density
- optical signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Lasers (AREA)
Abstract
The invention discloses a kind of device strengthening extinction ratio and optical sender, photoreceiver, optical module, relate to the communications field, extinction ratio can be strengthened.Described device includes: the device being made up of the material with saturable absorption effect, is used for allowing optical signal pass through.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of device strengthening extinction ratio and light emission
Machine, photoreceiver, optical module.
Background technology
Along with the user's continuous growth to bandwidth demand, the Fibre Optical Communication Technology that bandwidth capacity is huge
Increasingly mature, Optical Access Network becomes the contenders of broadband access network of future generation, Qi Zhongyou
It is more competitive with EPON (PON, Passive Optical Network) system.
Along with the demand of access bandwidth is more and more higher, the optical module caused in PON system is received and dispatched
Speed also improves constantly.But, for the PON system of high modulation rate, even if 20km's
Also will cause obvious dispersion penalty in transmission range, and thus cause system reception sensitivity serious
Declining, transmission degraded signal quality is serious.
The 10G PON optical sender of present stage mostly use electroabsorption modulator (EML,
Electro-absorption Modulated Laser) emission system.For 10G and to raise
The soft exchange module of speed processed, EML obviously can solve the signal distortion that dispersion causes and asks
Topic, but EML is with high costs, and introduce bigger insertion loss (6～8dB), the most also
Module dissipation is caused to remain high.
In order to reduce cost, it is desirable to use simple in construction, be easily achieved and with low cost direct
Modulation laser instrument DML(Direct Modulated Laser), DML is by changing injection current
Carry out the output of semiconductor laser modulation, but modulation electric current can cause the change of active layer refractive index,
The phase place causing light is modulated, there is bigger frequency chirp phenomenon, causes the DML can only be
Could use in the case of relatively low extinction ratio, but the sensitivity causing DML is declined by this, and
Extinction ratio is not in the range of the extinction ratio that agreement limits.
Described on end, how to obtain extinction ratio light emission in the range of the extinction ratio that agreement limits
Machine, is current 10G PON and engineering anxious to be resolved that higher rate PON system is faced
A difficult problem.
Summary of the invention
The invention provides a kind of device strengthening extinction ratio and optical sender, photoreceiver, light
Module, described optical module includes optical sender, photoreceiver, described a kind of extinction ratio that strengthens
Device transmitter in optical module and/or the receiver in optical module, it is possible to make optical signal lead to
After crossing assembly of the invention, its extinction ratio is strengthened.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
First aspect, it is provided that a kind of device strengthening extinction ratio, is applied in optical module, institute
State device to include: the device being made up of the material with saturable absorption effect, be used for allowing light believe
Number pass through.
In the first mode in the cards, in conjunction with first aspect, described device also includes:
Energy density controller, be used for so that described optical signal by described by having saturable absorption
Regulate the energy density of optical signal before the device that the material of effect is constituted, by described by having
After having the device that the material of saturable absorption effect constitutes, reversely the energy of regulation optical signal is close
Degree.
In the second mode in the cards, in conjunction with the first mode in the cards, described
Energy density controller includes: two collecting lenses, and said two collecting lens is separately positioned on
The described device two ends being made up of the material with saturable absorption effect；Or,
Described energy density controller includes: first wave guide, and described first wave guide includes: covering,
Linear type ducting layer, the waveguide two ends of described linear type ducting layer be to centre in assemble shape or to
Middle in divergent shape, described in there is the device that the material of saturable absorption effect constitutes be positioned at described
The cross-section of linear type ducting layer；Or,
Described energy density controller includes: second waveguide, and described second waveguide includes: covering,
Sawtooth pattern ducting layer, the waveguide two ends of described sawtooth pattern ducting layer be to centre in assemble shape or to
Middle in divergent shape, the described device being made up of the material with saturable absorption effect at least position
In the both sides pointed by the crown of described sawtooth pattern ducting layer.
In the third mode in the cards, arbitrary possible real in conjunction with first aspect or first two
Existing mode, described device also includes: modulation depth controller, is used for so that described optical signal
Through described modulation depth controller and the device of the material composition with saturable absorption effect
After, modulation depth is improved.
In the 4th kind of mode in the cards, in conjunction with the third mode in the cards, described
Modulation depth controller has to be made described in described optical signal Multiple through then out by having saturable absorption effect
The structure of the device that the material answered is constituted.
In the 5th kind of mode in the cards, in conjunction with the 3rd or the 4th kind of side in the cards
Formula, includes two collecting lenses at described energy density controller, or, including first wave guide
In the case of, described modulation depth controller includes: two partially reflective parts of FP, described FP
Partially reflective parts are separately positioned on the described device being made up of the material with saturable absorption effect
Part two ends.
In the 6th kind of mode in the cards, in conjunction with the 5th kind of mode in the cards, in institute
State in the case of energy density controller includes two collecting lenses, the partially reflective parts of described FP
For the partially reflective film of FP；
The partially reflective film of described FP is made up of the material with saturable absorption effect described in being plated in
On the end face of device, or, it is plated in the end face outside of described collecting lens.
In the 7th kind of mode in the cards, in conjunction with the 5th kind of mode in the cards, in institute
Stating in the case of energy density controller includes first wave guide, the partially reflective parts of described FP are FP
Partially reflective film；
The partially reflective film of described FP is made up of the material with saturable absorption effect described in being plated in
On the end face of device, or, it is plated on diaphragm and inserts in ducting layer.
In the 8th kind of mode in the cards, in conjunction with the 4th kind of mode in the cards, in institute
State in the case of energy density controller includes second waveguide, described modulation depth controller bag
Include: total reflection parts；Described total reflection parts are arranged on described by having saturable absorption effect
The outside of device that constitutes of material.
In the 9th kind of mode in the cards, arbitrary possible real in conjunction with first aspect or the first eight kind
Existing mode, described device also includes: extinction ratio improving performance supervising device, for monitoring by
The change of the extinction ratio improving performance that environmental factors or device performance factor cause, and according to described
The change of extinction ratio improving performance regulates described device.
Second aspect, it is provided that a kind of optical sender, described optical sender includes: laser instrument and
The device of the enhancing extinction ratio described in above-mentioned first aspect or nine kinds of arbitrary possible implementations.
The third aspect, it is provided that a kind of photoreceiver, described photoreceiver includes: opto-electronic conversion
Device and above-mentioned first aspect or the enhancing extinction ratio described in nine kinds of arbitrary possible implementations
Device.
Fourth aspect, it is provided that a kind of optical module, described optical module includes: optical sender and light
Receiver, wherein, described optical sender includes: laser instrument；Described photoreceiver includes: light
Electrical switching device；Described optical sender and/or described photoreceiver also include above-mentioned first aspect or
The device of the enhancing extinction ratio described in nine kinds of arbitrary possible implementations.
The invention provides a kind of device strengthening extinction ratio and optical sender, photoreceiver, light
Module, described optical module includes optical sender, photoreceiver, described a kind of extinction ratio that strengthens
Device transmitter in the optical module and or optical module in receiver, it is possible to make laser instrument send out
The light gone out is by after assembly of the invention, and its extinction ratio is strengthened.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will to embodiment or
In description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art
From the point of view of, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 be the device that a kind of material with saturable absorption effect is constituted absorbance with
Ein/Esat change curve；
A kind of device strengthening extinction ratio that Fig. 2 provides for the embodiment of the present invention；
The another kind of device strengthening extinction ratio that Fig. 3 provides for the embodiment of the present invention；
The another kind of device strengthening extinction ratio that Fig. 4 provides for the embodiment of the present invention；
The another kind of device strengthening extinction ratio that Fig. 5 provides for the embodiment of the present invention；
The another kind of device strengthening extinction ratio that Fig. 6 provides for the embodiment of the present invention；
Fig. 7 is that in prior art the power of the optical signal that 10G bit/s DML directly sends is at any time
Between change curve；
Arbitrary enhancing that the optical signal that Fig. 8 directly sends for DML provides through the embodiment of the present invention
The power versus time curve of the optical signal after the device of extinction ratio；
A kind of optical sender that Fig. 9 provides for the embodiment of the present invention；
A kind of photoreceiver that Figure 10 provides for the embodiment of the present invention；
A kind of optical module that Figure 11 provides for the embodiment of the present invention；
The another kind of device strengthening extinction ratio that Figure 12 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present invention
Case is clearly and completely described, it is clear that described embodiment is only the present invention one
Divide embodiment rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under not making creative work premise,
Broadly fall into the scope of protection of the invention.
A kind of device 10 strengthening extinction ratio provided the embodiment of the present invention below in conjunction with the accompanying drawings enters
Row describes in detail.
Extinction ratio (EX, Extinction Ratio) is defined as the average light merit of complete " 0 " signal
The ratio of the average light power p1 of rate p0 and complete " 1 " signal, available EXT represents, then
EXT=10lg (p1/p0) (dB), the deficiency of extinction ratio easily causes erroneous judgement to code element etc. to be
Row problem, therefore the size of extinction ratio serves critically important work for the performance of light emission system
With.
In the present embodiment, described a kind of device 10 strengthening extinction ratio is applied in optical module, bag
Include: the device being made up of the material with saturable absorption effect, be used for allowing optical signal pass through.
Above-mentioned saturable absorption effect refers to have the material of saturable absorption effect when light incides
Time, owing to the characteristic of this material itself causes it to the absorbance of incident illumination along with incident intensity
Difference and different, concrete, it has low non-of the low light level absorbance to high light absorbance is high
Linear absorption properties, example, Fig. 1 is that the material with saturable absorption effect is with incident illumination
Strong absorbance change curve schematic diagram, wherein Esat represents the material with saturable absorption effect
The saturation flux of material, Ein represents that the light energy inciding the material with saturable absorption effect is close
Degree.As it is shown in figure 1, as Ein/Esat ＜ 1, incident illumination energy is had saturable and is inhaled
The produce effects absorbed answered 57%, and as Ein/Esat ＞ 5,88% in projectile energy is saturating
Cross the material with saturable absorption effect.
Therefore, example, for an optical signal, as long as controlling the ratio of Ein/Esat, make
It falls between 1～5 so that optical signal " 1 " with high transmittance pass through described in have
The material of saturable absorption effect, then its power has saturable absorption effect described in passing through
Change less before and after material；And optical signal " 0 " signal with relatively low transmissivity pass through described in have can
The material of saturated absorption, its power has the material of saturable absorption effect described in pass through
Front and back change greatly so that the extinction ratio of optical signal " 1 " and optical signal " 0 " is strengthened.
At present, the material with saturable absorption effect includes: special optical fiber (photonic crystal non-thread
Property optical fiber), quasiconductor, carbon group material.
Owing to photonic crystal fiber needs large volume of dish fibre structure, module may be brought integrated
On difficulty, it is preferred, therefore, that in the embodiment of the present invention by having saturable absorption effect
Material constitute device in the material with saturable absorption effect can use quasiconductor or
Carbon group material.
It should be noted that the above-mentioned material with saturable absorption effect is not limited to above-mentioned
Material, example, it is also possible to be the material of multiple material doping, it is also possible to be a kind of new
The material found, only needs described material to have saturable absorption effect, and meets present invention enforcement
The requirement of example.
A kind of device 10 strengthening extinction ratio that the embodiment of the present invention provides, can strengthen delustring
Ratio, thus improve the performance of light emission system.
The invention of this reality is executed example and is provided the another kind of device 10 strengthening extinction ratio, and described device includes
The device being made up of the material with saturable absorption effect and energy density controller, Qi Zhongsuo
State energy density controller for make described optical signal by described by have saturable inhale
Regulate the energy density of optical signal before the device that the material answered of producing effects is constituted, by described by
After the device of the material composition with saturable absorption effect, reversely the energy of regulation optical signal is close
Degree.
Extinction ratio is have impact on, therefore owing to having the Ein/Esat of the material of saturable absorption effect
Ensure that the Ein/Esat of different optical signal is in the range of suitably.If having saturable absorption effect
The Esat of the material answered is bigger or less, then require also there is corresponding energy by its optical signal
Metric density, just can make the Ein/Esat of different optical signal in the range of suitably.
Concrete, if Esat pair of the device being made up of the material with saturable absorption effect
For optical signal higher, first, described energy density controller then needs to regulate described light
The energy density of signal so that the energy density of optical signal increases；Secondly, after described regulation
Optical signal is by the described device being made up of the material with saturable absorption effect；Then, then
Reversely adjust by the optical signal of the described device being made up of the material with saturable absorption effect
Joint so that reversely the energy density of the optical signal after regulation reverts to the size before not regulating.
If the Esat of the device being made up of the material with saturable absorption effect itself is for light
For signal relatively low, first, described energy density controller then needs to regulate described optical signal
Energy density so that the energy density of optical signal reduces；Secondly, the light letter after described regulation
Number by the described device being made up of the material with saturable absorption effect；Then, then to logical
The optical signal crossing the described device being made up of the material with saturable absorption effect reversely regulates,
The energy density making the optical signal after reversely regulating reverts to the size before not regulating.
Optionally, described energy density controller may include that two collecting lenses, described two
Individual collecting lens is separately positioned on the described device being made up of the material with saturable absorption effect
Two ends.
Or optional, described energy density controller may include that first wave guide, described the
One waveguide includes: covering, linear type ducting layer, described by the material with saturable absorption effect
The device that material is constituted is positioned at the cross-section of described linear type ducting layer.
Or optional, described energy density controller may include that second waveguide, described the
Two waveguides include: covering, sawtooth pattern ducting layer, described by the material with saturable absorption effect
The device that material is constituted is positioned at the periphery of described sawtooth pattern ducting layer.
It should be noted that if described energy density controller, need to regulate described optical signal
Energy density so that the energy density of optical signal increases, then the linear type guided wave of first wave guide
The waveguide two ends of sawtooth pattern ducting layer of layer or second waveguide be to centre in convergence shape (with the
As a example by one waveguide, the linear type ducting layer structure of first wave guide is as shown in Fig. 4 4), so
Structure enable to be able to through the energy density of first wave guide or the optical signal of second waveguide
Increasing, waveguide two ends are in assembling the structure of shape in first wave guide or second waveguide to centre
Play the structure of the practical function of energization density；
If described energy density controller, need to regulate the energy density of described optical signal, make
The energy density of optical signal reduces, then the linear type ducting layer of first wave guide or second waveguide
The waveguide two ends of sawtooth pattern ducting layer be to centre be divergent shape (as a example by first wave guide,
The linear type ducting layer structure of one waveguide is as shown in Figure 12 4), such structure enables to
Energy density through first wave guide or the optical signal of second waveguide is reduced, waveguide two ends
For to centre be the structure of divergent shape play in first wave guide or second waveguide reduction energy close
The structure of the practical function of degree.
The another kind of device strengthening extinction ratio that the embodiment of the present invention provides, can be described by having
There is the Esat of the device that the material of saturable absorption effect constitutes relative to light emission module laser instrument
In the case of the energy density of the optical signal sent is higher or on the low side, regulate described light emission mould
The energy density of the optical signal that block laser instrument sends so that after the energy density of regulation optical signal,
The Ein/Esat of the signal that different optical signals are corresponding is in the range of suitably, and then strengthens extinction ratio.
Embodiments provide the another kind of device 10 strengthening extinction ratio, described device bag
Include: the device being made up of the material with saturable absorption effect and modulation depth controller, institute
State modulation depth controller for making described optical signal through described modulation depth controller and tool
After having the device that the material of saturable absorption effect is constituted, modulation depth is improved.
Concrete, the energy density of the optical signal sent at laser instrument and by having saturable absorption
On the premise of the saturation flux of the device that the material of effect is constituted meets requirement, use described modulation
Depth controller so that described optical signal through described modulation depth controller and have can
After the device that the material of saturated absorption is constituted, modulation depth is improved.
Further, described modulation depth controller can have and makes described optical signal Multiple through then out
The structure of the described device being made up of the material with saturable absorption effect.
For not including the device of described enhancing extinction ratio of modulation depth controller, can
To improve modulation depth further, and then strengthen extinction ratio.
Embodiments providing the another kind of device 10 strengthening extinction ratio, described device 10 wraps
Include: device, energy density controller and the tune being made up of the material with saturable absorption effect
Depth controller processed.
If the Esat with the material of saturable absorption effect is bigger or less, then require to pass through
Its optical signal also has corresponding energy density, and the Ein/Esat of different optical signal just can be made to exist
In the range of He Shi, it is therefore desirable to the energy that employing energy density controller regulates optical signal is close
Degree；Further, it is also possible to use modulation depth controller, improve modulation depth, thus enter
One step strengthens extinction ratio.
Concrete, it is real that the device 10 of described enhancing extinction ratio includes that the optional mode of following four is come
Existing:
Energy density controller in four kinds of optional modes described herein is all described first to increase
The energy density of optical signal, then be described as a example by recovering the energy density of described optical signal.
Mode 1: the energy density controller in described device includes two collecting lenses, described dress
Modulation depth controller in putting includes two partially reflective films of FP, described Fabry Paro (FP)
Partially reflective film is plated in the end face of the described device being made up of the material with saturable absorption effect
On.
Concrete, use device corresponding to the manner (the arrow side of dotted line in figure as shown in Figure 2
Direction to for optical signal), in figure, 1 expression is made up of the material with saturable absorption effect
Device, 2 represent that modulation depth controllers include the partially reflective film of FP, and 3 represent substrates, 4 tables
Show the collecting lens that energy density controller includes.
When implementing, first can plate 2 on the right of in the of 1 on 3, plate 1 the most on this basis,
Plate the 2 of 1 left side the most on this basis.
In figure, 5 is the FP chamber of two Fabry Paro (FP) partially reflective films compositions of 2 expressions,
1 is positioned at the centre position of 5 (when being positioned in 2 for 1, claims now 1 and 2 knot formed
Structure is FP-SAE, and wherein SAE represents saturable absorption effect), the collecting lens on the left side in figure
4 pairs of optical signals are focused, and make the waist of optical signal be in the center in FP chamber, thus improve light
The energy density of signal, in figure, the collecting lens 4 on the right is for recovering the optical signal by 5
Energy density.
It is pointed out that in the manner, modulation depth controller uses the partially reflective film of FP,
Its principle is by using two partially reflective films of FP, forms spatial FP chamber, described space
Formula FP chamber is resonant cavity, after optical signal incides described spatial FP chamber, two FP parts
Penetrate after reflecting intermembranous multiple reflections, and the outfan interference in FP chamber, thus improve modulation
The degree of depth, can form stationary field so that be made up of the material with saturable absorption effect simultaneously
The Esat of device also has corresponding minimizing.
Described FP chamber is likely to produce comb filtering while improving the modulation depth of described device
Characteristic, the wavelength that this comb filtering characteristic can reduce the optical signal by described FP chamber is smooth
Property, when the wavelength flatness of optical signal is reduced to certain specific threshold, if described device is included in
In optical sender, then will cause the alignment issues of itself and laser instrument.In consideration of it, can be by excellent
The reflectance of the thickness and FP chamber of changing design 1 recovers the wavelength flatness of described device, it is to avoid
It is directed at the wavelength of laser instrument.
The cavity length in described FP chamber becomes anti-with the free spectral range (FSR) of comb filtering curve
Ratio, the material that the device for being made up of the material with saturable absorption effect uses is partly to lead
The situation of body, generally its thickness can be with 100 nanometers～the scopes of 10 microns.
Mode 2: the energy density controller in described device includes two collecting lenses, described dress
Modulation depth controller in putting includes two partially reflective films of FP, the partially reflective film of described FP
It is plated in the end face outside of described collecting lens.
The principle of energy density controller and modulation depth controller and mode 1 phase in the manner
With, but different with the structure that mode 1 uses, repeat no more principle the most here, below
The structure using the manner is described in detail:
Concrete, use device corresponding to the manner (the arrow side of dotted line in figure as shown in Figure 3
Direction to for optical signal), in figure, 1 expression is made up of the material with saturable absorption effect
Device, 2 represent the partially reflective film of FP that includes of modulation depth controllers, and 3 represent that energy are close
The collecting lens that degree controller includes, 4 represent substrate.
Visible, in figure, 5 is the FP chamber of two FP partially reflective films compositions of 2 expressions, and 1 is positioned at
The centre position in FP chamber, in figure, optical signal is focused by the collecting lens 3 on the left side, makes light believe
Number waist be in the center in FP chamber, thus improve the energy density of optical signal, the right in figure
Collecting lens 3 is for recovering the energy density of the optical signal by 5.
The waist making optical signal be in FP chamber center (unlike mode 1, the manner
The focusing of energy density controller moves in FP chamber), thus improve the energy density of optical signal.
When implementing, 1 can be plated on first 4, on 3, plate 2.
Mode 3: the energy density controller in described device includes: first wave guide, described device
In modulation depth controller include two partially reflective parts of FP, and described FP is partially reflective
Parts are separately positioned on the described device two ends being made up of the material with saturable absorption effect.
Concrete, if the energy density controller in described device is for increasing the energy of optical signal
Density, then (in figure, the direction of arrow of dotted line is the device that employing the manner is corresponding as shown in Figure 4
The direction of optical signal), in Fig. 4,1 expression is made up of the material with saturable absorption effect
Device, the partially reflective parts of FP that 2 expression modulation depth controllers include, 3 expression substrates, 4
The tapered ducting layer of linear type of the first tapered transmission line that expression energy density controller includes, 5 represent
The covering of the first tapered transmission line that expression energy density controller includes.
Or, if the energy density controller in described device is close for the energy reducing optical signal
Degree, (in figure, the direction of arrow of dotted line is light letter as shown in figure 12 to use device corresponding to the manner
Number direction), in Figure 12,1 represents the device that is made up of the material with saturable absorption effect,
2 represent the partially reflective parts of FP that modulation depth controller includes, 3 represent substrate, and 4 represent energy
The tapered ducting layer of linear type of the first tapered transmission line that metric density controller includes, 5 represent energy
The covering of the first tapered transmission line that metric density controller includes.
Visible, in figure, 6 is the FP chamber of two FP partially reflective films compositions of 2 expressions, and 1 is positioned at
The centre position in FP chamber.
When implementing, optionally, as shown in Figure 4, described partially reflective parts can be portion
Divide reflection diaphragm, now can carve 3 grooves in waveguide, then will put into ripple after plating 1 on 3
In the groove in the centre position of the ducting layer led, then insert respectively in the other two groove of waveguide
2, described other two groove is symmetrically located in the both sides of centre position groove.
Or optional, as it is shown in figure 5, described partially reflective parts can be partially reflective film,
Now first can carve 1 groove in waveguide, on 3, then first plate 2 on the right of in the of 1, basis at this
Upper plating 1, then plate the 2 of 1 left side on this basis, the overall groove inserting waveguide that then will obtain
In.
It is pointed out that in the manner, energy density controller uses waveguide, adjusts
Depth controller processed uses the partially reflective parts of FP, and its principle is by using two FP parts
Reflection part, forms waveguide type FP chamber, and described waveguide type FP chamber is resonant cavity, and optical signal enters
After being mapped to described waveguide type FP chamber, at two partially reflective intermembranous multiple reflections of FP, and
The outfan in waveguide type FP chamber penetrates after interfering, thus improves modulation depth, can be formed simultaneously and stay
Wave field so that the Esat of the device being made up of the material with saturable absorption effect also has accordingly
Minimizing.
Mode 4: the energy density controller in described device includes: second waveguide, described modulation
Depth controller includes: total reflection parts；Described total reflection parts are arranged on described by have can
The periphery of the device that the material of saturated absorption is constituted.
Concrete, use device corresponding to the manner (the arrow side of dotted line in figure as shown in Figure 6
Direction to for optical signal), in figure, 1 expression is made up of the material with saturable absorption effect
Device, 2 represent the total reflection parts that include of modulation depth controllers, and 3 represent energy density controls
The sawtooth pattern taper ducting layer of the second tapered transmission line that device processed includes, 4 represent energy density controller
Including the covering of the second tapered transmission line.
Visible, in figure, 6 is the FP chamber of two FP partially reflective films compositions of 2 expressions, and 1 is positioned at
The centre position in FP chamber.
When implementing, optionally, as shown in Figure 6, described total reflection parts can be to be all-trans
Penetrate diaphragm, it is also possible to be total reflection film, if described total reflection parts can be total reflection diaphragm,
Then this diaphragm need to be affixed on 1, if described total reflection parts can be total reflection film, then needs
First this film is plated on 1.
Now can in the waveguide, ducting layer 2 grooves at laterally zygomorphic quarter, then by 1 and 2
Entirety after process is inserted in 2 grooves of described symmetry respectively.
The structure of the sawtooth pattern waveguide in the manner is to make the optical signal can be with Multiple through then out by having
There is the device that the material of saturable absorption effect is constituted, thus improve the energy of the optical signal by it
Metric density.
For reaching above effect, the angle of each sawtooth of the ducting layer of sawtooth pattern waveguide is the least,
Due to the optical signal direction of propagation wherein the most unsmooth, therefore the more light in optical signal letter
Number will not propagate along the direction of the ducting layer of sawtooth pattern waveguide, and can linearly pass
Broadcast, and then by the device by being made up of the material with saturable absorption effect, in order to be light
Signal the fewest loss and can Multiple through then out by the material structure with saturable absorption effect
The device become, needs to stick outside the device being made up of the material with saturable absorption effect
It is totally reflected diaphragm or plates total reflection film so that by by the material with saturable absorption effect
The optical signal of the device that material is constituted can reflect, as far as possible along leading of sawtooth pattern waveguide
The direction of ripple layer is propagated, thus can Multiple through then out by the material structure with saturable absorption effect
The device become, reaches to improve the effect of modulation depth.
By emulation, for directly modulation laser instrument (DML, the Direct of 10G bit/s
Modulated Laser) optical signal (as shown in Figure 7) that directly sends, its wavelength is 1578nm,
Extinction ratio 3dB, output 4.75dBm, select as shown in Figure 1 by having saturable absorption
The absorbance of the device that the material of effect is constituted with light signal strength variation relation curve,
Esat=3a.u, uses d=1.195 micron, R1=R2=0.5 reflectance.As shown in Figure 8, warp
After crossing described device, optical signal " 1 " is decayed about 1dB, optical signal " 0 " decay 13dB, whole
Body extinction ratio improves 12dB.
It is pointed out that a kind of dress strengthening extinction ratio that any of the above-described embodiment is provided
Put 10, extinction ratio improving performance supervising device can be included, for monitoring by environmental factors or
The extinction ratio improving performance that device performance factor (such as device aging, interference etc. between device) causes
Change, and regulate described device according to the change of described extinction ratio improving performance.
Example, if the delustring that described a kind of device strengthening extinction ratio can reach in theory
It is 6dB than improving performance, the most described extinction ratio improving performance supervising device preserves above-mentioned 6dB value
As a threshold value, when due to the factor such as interference between device aging, device, cause described delustring
The extinction ratio improving performance more actually measured than improving performance supervising device only has 3dB, less than threshold value
6dB, the most described extinction ratio improving performance supervising device can by regulation collecting lens between away from
From, or use the method regulation of electrified regulation to be made up of the material with saturable absorption effect
The modes such as the thickness of device, are controlled described a kind of device strengthening extinction ratio, so that
The actual extinction ratio improving performance of described a kind of device strengthening extinction ratio reaches 6dB.
Example, such as the device of mode 1 correspondence, can be by regulating between collecting lens
Distance, or use electrified regulation method regulate by the material structure with saturable absorption effect
The modes such as the thickness of the device become, regulate described device.
It is pointed out that in above-mentioned Fig. 2,3,4,5,6 and 12, the 10 of the upper left corner
Represent the concrete knot that Fig. 2,3,4,5,6 and 12 are a kind of device 10 strengthening extinction ratio
Structure.
The embodiment of the present invention additionally provides a kind of optical sender 100, photoreceiver 110, optical module
120。
As shown in figure 11, described optical module 120 system includes optical sender 100 and photoreceiver
110。
As it is shown in figure 9, described optical sender 100 includes laser instrument 101, further, described
Optical sender can also include the device of any one enhancing extinction ratio provided in above-described embodiment
10.Light emission module laser instrument therein can be any one laser instrument of the prior art,
Example, can be DML, it is also possible to be EML.
If optical sender includes any one enhancing extinction ratio provided in DML and above-described embodiment
Device 10, then can solve DML and cause DML only owing to there is bigger frequency chirp phenomenon
Could be able to use in the case of relatively low extinction ratio, further result in DML sensitivity decline and
Extinction ratio not agreement limit extinction ratio in the range of problem, thus obtained a kind of structure letter
Singly, it is easily achieved and high rate modulation optical sender with low cost.
As shown in Figure 10, described photoreceiver 110 includes photoelectric conversion device 111, further
, it is also possible to the device 10 of any one enhancing extinction ratio provided in above-described embodiment is provided.
A kind of optical sender 100 of the present embodiment offer, photoreceiver 110, optical module 120,
By using a kind of device 10 strengthening extinction ratio, make the light that laser instrument sends by described one
After strengthening the device of extinction ratio, its extinction ratio is strengthened, and then improving performance.
Last it is noted that above example is only in order to illustrate technical scheme, and
Non-to its restriction；Although the present invention being described in detail with reference to previous embodiment, ability
The those of ordinary skill in territory is it is understood that it still can be to the skill described in foregoing embodiments
Art scheme is modified, or wherein portion of techniques feature is carried out equivalent；And these are repaiied
Change or replace, not making the essence of appropriate technical solution depart from various embodiments of the present invention technical side
The spirit and scope of case.
Claims (12)
1. the device strengthening extinction ratio, it is characterised in that be applied in optical module, described
Device includes: the device being made up of the material with saturable absorption effect, is used for allowing optical signal
Pass through；
Described device also includes: energy density controller, is used for so that described optical signal is passing through
The energy of optical signal is regulated before the described device being made up of the material with saturable absorption effect
Density, after by the described device being made up of the material with saturable absorption effect reversely
The energy density of regulation optical signal.
Device the most according to claim 1, it is characterised in that
Described energy density controller includes: two collecting lenses, and said two collecting lens divides
It is not arranged on the described device two ends being made up of the material with saturable absorption effect；Or,
Described energy density controller includes: first wave guide, and described first wave guide includes: covering,
Linear type ducting layer, the waveguide two ends of described linear type ducting layer be to centre in assemble shape or to
Middle in divergent shape, described in there is the device that the material of saturable absorption effect constitutes be positioned at described
The cross-section of linear type ducting layer；Or,
Described energy density controller includes: second waveguide, and described second waveguide includes: covering,
Sawtooth pattern ducting layer, the waveguide two ends of described sawtooth pattern ducting layer be to centre in assemble shape or to
Middle in divergent shape, the described device being made up of the material with saturable absorption effect at least position
In the both sides pointed by the crown of described sawtooth pattern ducting layer.
3. according to the device described in any one of claim 1-2, it is characterised in that described device
Also include: modulation depth controller, be used for so that described optical signal is through described modulation depth control
After the device that device processed and the material with saturable absorption effect are constituted, modulation depth is improved.
Device the most according to claim 3, it is characterised in that described modulation depth controls
Utensil has to be made to be made up of the material with saturable absorption effect described in described optical signal Multiple through then out
The structure of device.
Device the most according to claim 3, it is characterised in that in described energy density control
Device processed includes two collecting lenses, or, in the case of first wave guide, described modulation is deep
Degree controller includes: two Fabry partially reflective parts of Paro FP, described FP is partially reflective
Parts are separately positioned on the described device two ends being made up of the material with saturable absorption effect.
Device the most according to claim 5, it is characterised in that in described energy density control
In the case of device processed includes two collecting lenses, the partially reflective parts of described FP are that FP part is anti-
Penetrate film；
The partially reflective film of described FP is made up of the material with saturable absorption effect described in being plated in
Device end face on, or, be plated in the end face outside of described collecting lens.
Device the most according to claim 5, it is characterised in that in described energy density control
In the case of device processed includes first wave guide, the partially reflective parts of described FP are the partially reflective film of FP；
The partially reflective film of described FP is made up of the material with saturable absorption effect described in being plated in
Device end face on, or, be plated on diaphragm and insert in ducting layer.
Device the most according to claim 4, it is characterised in that in described energy density control
In the case of device processed includes second waveguide, described modulation depth controller includes: total reflection parts,
Described total reflection parts are arranged on the described device being made up of the material with saturable absorption effect
Outside.
9. according to the device described in claim 1-2, any one of 4-8, it is characterised in that described
Device also includes: extinction ratio improving performance supervising device, for monitoring by environmental factors or device
The change of the extinction ratio improving performance that performance factor causes, and according to described extinction ratio improving performance
Change regulate described device.
10. an optical sender, it is characterised in that described optical sender includes: laser instrument and
The device of the enhancing extinction ratio described in any one of the claims 1-9.
11. 1 kinds of photoreceivers, it is characterised in that described photoreceiver includes: opto-electronic conversion
The device of the enhancing extinction ratio described in device and any one of the claims 1-9.
12. 1 kinds of optical modules, it is characterised in that described optical module includes: optical sender and light
Receiver, wherein, described optical sender includes: laser instrument；Described photoreceiver includes: light
Electrical switching device；Described optical sender and/or described photoreceiver also include the claims 1-9
The device of the enhancing extinction ratio described in any one.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/079605 WO2015006958A1 (en) | 2013-07-18 | 2013-07-18 | Apparatus for enhancing extinction ratio, optical transmitter, optical receiver and optical module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103650386A CN103650386A (en) | 2014-03-19 |
| CN103650386B true CN103650386B (en) | 2016-11-02 |
Family
ID=50253415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380000719.9A Active CN103650386B (en) | 2013-07-18 | 2013-07-18 | A kind of device strengthening extinction ratio and optical sender, photoreceiver, optical module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103650386B (en) |
| WO (1) | WO2015006958A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541743B (en) * | 2017-09-22 | 2020-06-23 | 北京万集科技股份有限公司 | Silicon-based optical antenna and preparation method thereof |
| CN110832793B (en) * | 2017-11-03 | 2021-02-23 | 华为技术有限公司 | Optical transmitter sub-module and optical module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022313A (en) * | 2006-02-14 | 2007-08-22 | 冲电气工业株式会社 | Optical clock signal extraction device and optical clock signal extraction method |
| CN101399424A (en) * | 2008-10-10 | 2009-04-01 | 江苏大学 | Novel high-power strip laser system |
| CN101666953A (en) * | 2008-07-18 | 2010-03-10 | 阿尔卡特朗讯 | Method, device for eliminating or reducing polarization sensitivity of optical signal and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008111982A (en) * | 2006-10-30 | 2008-05-15 | Sumitomo Electric Ind Ltd | Electroabsorption light modulation semiconductor element |
-
2013
- 2013-07-18 CN CN201380000719.9A patent/CN103650386B/en active Active
- 2013-07-18 WO PCT/CN2013/079605 patent/WO2015006958A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022313A (en) * | 2006-02-14 | 2007-08-22 | 冲电气工业株式会社 | Optical clock signal extraction device and optical clock signal extraction method |
| CN101666953A (en) * | 2008-07-18 | 2010-03-10 | 阿尔卡特朗讯 | Method, device for eliminating or reducing polarization sensitivity of optical signal and manufacturing method thereof |
| CN101399424A (en) * | 2008-10-10 | 2009-04-01 | 江苏大学 | Novel high-power strip laser system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015006958A1 (en) | 2015-01-22 |
| CN103650386A (en) | 2014-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105634614B (en) | Optical sender, wavelength alignment methods and passive optical network | |
| CN105388637B (en) | A kind of thermo-optical switch of SOI base MZI types 1 × 2 based on dielectric deposition type surface plasma waveguide | |
| CN101571657B (en) | Photonic crystal all-optical switch | |
| CN101138176A (en) | High speed sfp transceiver | |
| CN102545007B (en) | Tunable laser and method for locking and monitoring wavelength of tunable laser | |
| CN103650386B (en) | A kind of device strengthening extinction ratio and optical sender, photoreceiver, optical module | |
| CN103392146A (en) | Light modulator | |
| CN105490164A (en) | Distributed feedback laser | |
| CN104880768A (en) | Tunable optical power divider | |
| CN105009487B (en) | A kind of optical sender and light launching technique | |
| CN201039188Y (en) | Pluggable optical module and electricity/optical signal conversion device | |
| CN202975403U (en) | Optical component | |
| CN202956503U (en) | Variable optical attenuator with wavelength dependent loss compensation function | |
| CN105515665B (en) | Full optical buffer based on excited Brillouin gain polarization characteristic | |
| CN206788415U (en) | A kind of optical filter | |
| CN101783477B (en) | Filtering endoscope used for optical fiber laser and optical fiber laser | |
| CN206178192U (en) | Fine wavelength division multiplexing module of miniature tape trailer | |
| CN202025112U (en) | Mode coupling optical assembly | |
| CN2506033Y (en) | Thin film interference filter type wave multiplexing device | |
| CN205427248U (en) | Take emission of light subassembly, opto -receiver module and optical module of aimer | |
| CN205003321U (en) | Continuous reflection -type dense wavelength division multiplexing ware of diaphragm | |
| CN203838378U (en) | Multichannel parallel optical assembly with backlight monitoring | |
| CN103558666B (en) | Improve optical device and the manufacture method thereof of wavelength-selective switches interchannel isolation | |
| CN205176448U (en) | Mix integrated automatically controlled liquid crystal light switch matrix | |
| CN101470233B (en) | Y-branching waveguide device with inclined light guide output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |