CN104756332B - A kind of laser, light signal modulating method and optical network system - Google Patents
A kind of laser, light signal modulating method and optical network system Download PDFInfo
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- CN104756332B CN104756332B CN201380001772.0A CN201380001772A CN104756332B CN 104756332 B CN104756332 B CN 104756332B CN 201380001772 A CN201380001772 A CN 201380001772A CN 104756332 B CN104756332 B CN 104756332B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
- H01S5/0625—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in multi-section lasers
- H01S5/06255—Controlling the frequency of the radiation
- H01S5/06258—Controlling the frequency of the radiation with DFB-structure
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Abstract
A kind of laser, light signal modulating method and optical network system, are related to the communications field, there is provided a kind of mechanism of optical signal modulation, realize the chirp value that optical signal is reduced in optical signal modulation, ensure that the single mode operating of laser, increase the reliability of laser.Specific method is：Laser produces the light that area (11) produce at least two different wave lengths, the light of at least two different wave length reaches laser reflection area (13) by regulatory region (12), then the light reflection in the light of laser reflection area (13) at least two different wave length produces reflected light, the reflected light produces area (11) by regulatory region (12) return laser light, and then laser produces area (11) according to the reflection photogenerated transmitting light.The technical scheme is the modulation to optical signal in laser.
Description
Technical field
The present invention relates to optical communication field, more particularly to a kind of laser, light signal modulating method and optical network system.
Background technology
With the deployment of Optical Access Network of new generation, requirement of the broadband access to transmission rate and transmission range constantly carries
Height, traditional DML（Directed Modulated Laser, directly modulate laser）Emitter during high-speed transfer,
Due to the limitation of modulation scheme, light frequency and luminous intensity can produce change along with modulated signal, and then produce modulating frequency Zhou
Sing.And the dispersion interaction of chirp change over time and optical fiber, optical signal can be caused to be deformed after the transmission, serious shadow
Ring the sensitivity received.Therefore, reducing caused chirp in modulated process as far as possible just turns into DLM in high-peed connection of new generation
The primary premise of net application.
In the prior art, there is provided two kinds of low chirped lasers, to reduce caused chirp in modulated process.
One kind is to use hybrid integrated DBR（Distributed Bragg Reflector, distributed Bragg reflector）Knot
The low chirped laser that structure is realized.The laser carries out lasing mode selection using DBR as laser mirror, utilizes laser
The deviation of wavelength and DBR reflection wavelengths suppresses chirp during modulation.But because this class laser needs very narrow DBR anti-
Spectrum width is penetrated, can only be realized at present by way of hybrid integrated, cost is higher, lacks practicality.
One kind is to couple DFB by gain（Distributed Feedback Bragg, distributed-feedback Prague laser）
The feedback district's groups of area and no-raster into laser.Wherein, gain coupling DFB areas are leading portion region, for producing gain and adding
Carry modulated signal.The feedback area of no-raster is back segment region, and its refractive index can be adjusted using phase controlling electric current.When anti-
When presenting the phase in area within the specific limits, frequency change caused by DFB area modulations will be compressed, defeated so as to reduce
Go out the chirp of signal.But the laser of this structure is used, in order to ensure that the single mode of laser operates, its DBF region is necessary
To use the gain coupled structure that change with length cycles of gain, but using gain coupled structure can cause laser can
Decline by property.
The content of the invention
The embodiment of the present invention provides a kind of laser, light signal modulating method and optical network system, there is provided a kind of light letter
Number modulation mechanism, realize in optical signal modulation reduce optical signal chirp value, and ensure that laser single mode operating,
Increase the reliability of laser.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
First aspect, there is provided a kind of laser, the laser include：Laser produces area, regulatory region and laser reflection area；
Laser produces area, and for producing the light of at least two different wave lengths, the light of at least two different wave length passes through
The regulatory region reaches the laser reflection area；
Laser reflection area, for the light reflection in the light of at least two different wave length to be produced into reflected light, institute
State reflected light and return to the laser generation area by the regulatory region, the wavelength of the reflected light produces swashing for area with the laser
Wavelength is identical corresponding to emission mode.
With reference in a first aspect, in the first possible implementation, including：
The bottom of the laser is provided with common substrate, the common substrate is used to protect the laser, described
Laser produces area, regulatory region and laser reflection area and shares the common substrate；
The top layer of the laser is provided with public covering, the public covering is used to protect the laser, described
Laser produces area, regulatory region and laser reflection area and shares the public covering.
With reference to the first possible implementation of first aspect, in second of possible implementation, the laser
Producing area includes：
Ducting layer, grating is etched with the ducting layer, the ducting layer is arranged in the common substrate；
Quantum well layer, the quantum well layer are arranged between the public covering and the grating.
With reference to the first possible implementation of first aspect, in the third possible implementation, the laser
Producing area includes：
Quantum well layer, the quantum well layer are arranged between the public covering and the common substrate；
Grating is etched with the quantum well layer.
With reference to second of first aspect or the third possible implementation, in the 4th kind of possible implementation,
The quantum well layer is used for the light for producing multiple different wave lengths, and the grating is used for multiple differences caused by the quantum well layer
The light of wavelength is screened, to obtain the light of at least two different wave length；
The grating is equally distributed grating.
With reference to the first possible implementation of first aspect, in the 5th kind of possible implementation, the regulation
Area includes：
Ducting layer, the ducting layer are arranged between the public covering and the common substrate.
With reference to the first possible implementation of first aspect, in the 6th kind of possible implementation, the laser
Echo area includes：
Ducting layer, is etched with grating on the ducting layer, and the ducting layer is arranged on the public covering and the public affairs
Between common substrate；
The grating is equally distributed grating.
With reference in a first aspect, in the first possible implementation of first aspect,
The laser also includes：
Adjustment module, for when the chirp value of transmitting light is unsatisfactory for preparatory condition, entering to the refractive index of the regulatory region
Row regulation.
Second aspect, there is provided a kind of light signal modulating method, methods described include：
The light that area produces at least two different wave lengths is produced, the light of at least two different wave length reaches by regulatory region
Laser reflection area；
A light in the light of at least two different wave length is reflected and produces reflected light, described in the reflected light process
Regulatory region returns to the laser and produces area, the wavelength of reflected light wavelength corresponding with the excitation mode that the laser produces area
It is identical；
According to the reflection photogenerated transmitting light.
With reference to second aspect, in the first possible implementation, the light bag for producing at least two different wave lengths
Include：
The light of multiple different wave lengths is produced, and the light of multiple different wave lengths caused by the quantum well layer is screened,
To obtain the light of at least two different wave length.
With reference to the possible implementation of the first of second aspect and second aspect, in second of possible implementation
In, methods described also includes：
When the chirp value for launching light is unsatisfactory for preparatory condition, the refractive index of the regulatory region is adjusted.
The third aspect, there is provided a kind of optical network system, the optical network system comprise at least：Optical line terminal and multiple light
NE, the optical line terminal and/or the multiple optical network unit include laser as described in relation to the first aspect.
The embodiment of the present invention provides a kind of laser, light signal modulating method and optical network system, first produces area by laser
The light of at least two different wave lengths is produced, the light of at least two different wave length reaches laser reflection area by regulatory region, then
Light reflection in the light of laser reflection area at least two different wave length produces reflected light, and the reflected light is returned by regulatory region
Return laser and produce area, then laser produces area according to the reflection photogenerated transmitting light.So as to provide a kind of optical signal modulation
Mechanism, realize in optical signal modulation reduce optical signal chirp value, ensure that laser single mode operating, increase laser
The reliability of device.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of light signal modulating method provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic flow sheet of light signal modulating method provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of laser provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of laser provided in an embodiment of the present invention；
Fig. 5 is a kind of structural representation of laser provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of laser provided in an embodiment of the present invention；
Fig. 7 is the relation schematic diagram of a kind of chirp compression ratio provided in an embodiment of the present invention and regulatory region variations in refractive index；
Fig. 8 is a kind of structural representation of optical network system provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
A kind of light signal modulating method provided in an embodiment of the present invention, applied to a kind of laser, the laser includes swashing
Light produces area, regulatory region and laser reflection area, as shown in figure 1, methods described includes：
101st, laser produces the light that area produces at least two different wave lengths, and the light of at least two different wave length is through overregulating
Area reaches laser reflection area.
102nd, the light reflection in the light of at least two different wave length is produced reflected light, reflected light by laser reflection area
Area is produced by regulatory region return laser light, the wavelength of the reflected light is identical with wavelength corresponding to the excitation mode in laser generation area.
103rd, laser produces area according to reflection photogenerated transmitting light.
In addition, when the chirp value for launching light is unsatisfactory for preparatory condition, as shown in Fig. 2 this method also includes：
104th, the refractive index of regulatory region is adjusted.Wherein, chirp value refers to launch centre wavelength in optical transmission process
The size for the hour offset amount that shifts.
Wherein, the regulatory region is no grating.
After the refractive index of the regulatory region is adjusted, 101~103 can be performed again.
The embodiment of the present invention provides a kind of light signal modulating method, and laser produces area and produces at least two different wave lengths
Light, the light of at least two different wave length reach laser reflection area by regulatory region, then laser reflection area this at least two not
Light reflection in the light of co-wavelength produces reflected light, and the reflected light produces area by regulatory region return laser light, then laser
Area is produced according to the reflection photogenerated transmitting light.So as to provide a kind of mechanism of optical signal modulation, realize in optical signal
Reduce the chirp value of optical signal in modulation, ensure that the single mode operating of laser, increase the reliability of laser.
A kind of laser 1 provided in an embodiment of the present invention, as shown in figure 3, including：Laser produces area 11, the and of regulatory region 12
Laser reflection area 13.
Laser produces area 11, and for producing the light of at least two different wave lengths, the light of at least two different wave length passes through
Regulatory region 12 reaches laser reflection area 13.
Laser reflection area 13, for the light reflection in the light of at least two different wave lengths to be produced into reflected light, reflection
Light produces area 11, the wavelength wavelength corresponding with the excitation mode that laser produces area 11 of reflected light by the return laser light of regulatory region 12
It is identical.
Laser produces area 11 and is additionally operable to according to reflection photogenerated transmitting light.
In addition, the regulatory region is no grating, unglazed grid region is referred to as.
Optionally, as shown in figure 4, the bottom in laser 1 is provided with common substrate 14, common substrate 14 is sharp for protecting
Light device 1, laser produce area 11, regulatory region 12 and laser reflection area 13 and share common substrate 14；
The top layer of laser 1 is provided with public covering 15, public covering 15 is used to protect laser 1, and laser produces area
11st, regulatory region 12 and laser reflection area 13 share public covering 15.
In addition, in another implementation, laser produces area 11, regulatory region 12 and laser reflection area 13 and can also used
Not common substrate and covering, i.e. laser produce area 11, regulatory region 12 and laser reflection area 13 using each independent substrate and
Covering.
Optionally, under a kind of implementation, include as shown in figure 5, laser produces area 11：
Ducting layer 111, is etched with grating 1111 on ducting layer 111, and ducting layer 111 sets on a common substrate 14；
Quantum well layer 112, quantum well layer 112 are arranged between public covering 15 and ducting layer 111.
Specifically, quantum well layer 112 is used for the light for producing multiple different wave lengths, grating 1111 is used for quantum well layer 112
The light of caused multiple different wave lengths is screened, to obtain the light of at least two different wave lengths；
In addition, grating 1111 is equally distributed grating.
As shown in figure 5, regulatory region 12 includes：
Ducting layer 121, ducting layer 121 are arranged between public covering 15 and common substrate 14.
As shown in figure 5, laser reflection area 13 includes：
Ducting layer 131, grating 1311 is etched with ducting layer 131, the ducting layer 131 is arranged on public covering 15 and public affairs
Between common substrate 14.
In addition, grating 1311 is equally distributed grating.
Or under another implementation, include as shown in fig. 6, laser produces area 11：
Quantum well layer 113, quantum well layer 113 are arranged between public covering 15 and common substrate 14；
Grating 1131 is etched with quantum well layer 113.
Specifically, quantum well layer 113 is used for the light for producing multiple different wave lengths, grating 1131 is used for quantum well layer 113
The light of caused multiple different wave lengths is screened, to obtain the light of at least two different wave lengths；
In addition, grating 1131 is equally distributed grating.
In laser 1 as shown in Figure 6, in the laser 1 shown in the structure and Fig. 5 in regulatory region 12 and laser reflection area 13
Regulatory region 12 and laser reflection area 13 it is identical, repeat no more.
Optionally, laser 1 also includes：
Adjustment module 16, for when the chirp value of transmitting light is unsatisfactory for preparatory condition, entering to the refractive index of regulatory region 12
Row regulation.
The outside that the adjustment module 16 can be connected on laser 1 outside can also be integrated in laser 1, the adjustment module 16
The refractive index of regulatory region 12 can be automatically adjusted according to the chirp value of transmitting light, can also be unsatisfactory in the chirp value of transmitting light pre-
If reminding keeper during condition, so as to which the refractive index of regulatory region 12 is adjusted according to the regulating command of keeper.It is above-mentioned
Preparatory condition can be a chirp value threshold value, or the threshold value of chirp compression ratio, the chirp compression ratio are current transmitting
The chirp value of light only exists laser with laser and produces the ratio between chirp value of transmitting light, the smaller table of chirp compression ratio caused by area
Show that chirp rejection ability is stronger.
In addition, the regulatory region is no grating, unglazed grid region is referred to as.
In addition, the laser 1 that the embodiment of the present invention provided can be DML, the laser in laser 1, which produces area, to be
DFB areas, laser reflection area can be DBR areas.
Further, embodiments of the invention are illustrated in order to clearer, exemplary, laser 1 modulates light
The idiographic flow of signal can be：
For convenience of explanation, it is assumed that laser produces the light that area produces 3 different wave lengths simultaneously, and respectively wavelength is the of A
The three-beam that the second beam light and wavelength that light beam, wavelength are B are C；Wherein, the wavelength is A light beam, wavelength B
The second beam light and wavelength be C three-beam not refer in particular to, be merely exemplary.
Specifically, first, it is respectively that wavelength is A that quantum well layer 112 that laser is produced in area 11 produces wavelength simultaneously
The three-beam that the second beam light and wavelength that light beam, wavelength are B are C, light beam, the wavelength that then wavelength is A are the of B
Two beam light and the three-beam that wavelength is C enter ducting layer 111 simultaneously.
Then, three-beam that the second light and wavelength that light beam, the wavelength that the wavelength is A are B are C while ripple is passed through
The grating 1111 of conducting shell 111, for the grating 1111 according to filter type set in advance, wavelength-filtered is C three-beam, is retained
The light beam that wavelength is A and the second light that wavelength is B, the light beam that then wavelength is A and the second beam light that wavelength is B
Enter regulatory region 12 simultaneously.Wherein, the setting of the filter type of grating 1111 of ducting layer 111 can be set by the structure of the grating
Count to realize, be not limited herein.Or：
Three-beam that the second light and wavelength that light beam, the wavelength that the wavelength is A are B are C while pass through SQW
The grating 1131 of layer 113, for the grating 1131 according to filter type set in advance, wavelength-filtered is C three-beam, retains ripple
A length of A light beam and wavelength is B the second light, and the light beam that then wavelength is A and the second beam light that wavelength is B are simultaneously
Into regulatory region 12.Wherein, the grating of the establishing method of the filter type of grating 1131 of quantum well layer 113 and ducting layer 111
The establishing method of 1111 filter types is identical or different.
Then, the light beam that the wavelength is A and the second beam light that wavelength is B are using ducting layer 121 while through overregulating
Area 12.Wherein, the refractive index of the ducting layer 121 in the regulatory region 12 can be adjusted, with will pass through adjust the refractive index subtract
The chirp value of small transmitting light；The transmitting light is the light that laser 1 finally exports.
The light beam for being A in the wavelength and the second beam light that wavelength is B simultaneously by regulatory region 12 after, it is anti-to reach laser
Area 13 is penetrated, the light beam that then wavelength is A and the second beam light that wavelength is B while the grating 1311 for passing through ducting layer 131,
For the grating 1311 according to filter type set in advance, wavelength-filtered is B the second beam light, retains the light beam that wavelength is A,
And the light beam that the wavelength is A is reflected back regulatory region 12.Wherein, the setting of the filter type of grating 1311 of ducting layer 131
Method is identical or different from the establishing method of the filter type of grating 1111 of ducting layer 111.
Then, the wavelength is that A light beam utilizes ducting layer 121, by regulatory region 12, reaches laser emitting region 11.
After the light beam that the wavelength is A reaches laser emitting region 11, laser emitting region 11 utilizes that the wavelength is A
A branch of photogenerated launches light.Wherein, the wavelength of the transmitting light is identical with the wavelength for the light beam that the wavelength is A.
As can be seen here, said process is a self feed back process, can be by adjusting regulatory region during the self feed back
The refractive index of ducting layer 121 realizes the reduction of the chirp value in the transmitting light in 12.
Meanwhile by the filtering of the grating 1111 of ducting layer 111 in laser emitting region 11 to three-beam that wavelength is C and
Filtering of the grating 1311 of ducting layer 131 to the second beam light that wavelength is B in laser reflection area 13, realize that wavelength is A the
The alignment of one of excitation mode caused by light beam and laser emitting region 11, i.e. wavelength be A light beam wavelength with
Laser 1 can caused by two have in the adjacent wavelength of maximum emission intensity one of them is identical, to ensure to launch
The emissive porwer of light, so as to realize that the single mode of laser 1 operates.
Exemplary, as shown in fig. 7, can be seen that by the variations in refractive index relation of chirp compression ratio and regulatory region 12
Laser 1 can allow chirp value to be reduced to 1/3rd of conventional DFB lasers chirp value.
The embodiment of the present invention provides a kind of laser, including laser produces area, regulatory region and laser reflection area, and laser produces
Area produces the light of at least two different wave lengths, and the light of at least two different wave length reaches laser reflection area by regulatory region, so
The light reflection in the light of laser reflection area at least two different wave length produces reflected light afterwards, and the reflected light passes through regulatory region
Return laser light produces area, and then laser produces area according to the reflection photogenerated transmitting light.Adjusted so as to provide a kind of optical signal
The mechanism of system, the chirp value for reducing optical signal in optical signal modulation is realized, ensure that the single mode operating of laser, increase
The reliability of laser.
The embodiment of the present invention also provides a kind of optical network system 00, and optical network system 00 comprises at least：Optical line terminal
（Optical Line Terminal, OLT）01 and multiple optical network units（Optical Network Unit, ONU）02, light
Line terminal 01 and/or multiple optical network units 02 include the laser 1 that previous embodiment provides.
Wherein, as shown in figure 8, optical line terminal 01 and multiple optical network units 02 can be connected by optical splitter 03.
Term "and/or" in the present invention, only a kind of incidence relation for describing affiliated partner, expression may have three kinds
Relation, for example, A and/or B, can be represented：Individualism A, while A and B be present, these three situations of individualism B.In addition, this
Character "/" in text, it is a kind of relation of "or" to typically represent forward-backward correlation object.
In several embodiments provided herein, it should be understood that disclosed method and apparatus, it can be passed through
Its mode is realized.For example, device embodiment described above is only schematical, for example, the division of module, is only
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple module or components can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.
The module illustrated as separating component can be or may not be physically separate, be shown as module
Part can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple networks
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, the functional module in each embodiment of the present invention can both can be realized in the form of hardware, also may be used
Realized in the form of adding SFU software functional unit using hardware.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are causing a computer
Equipment（Can be personal computer, server, or network equipment etc.）Perform the part step of each embodiment method of the present invention
Suddenly.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage（Read-Only Memory, abbreviation ROM）, with
Machine accesses memory（Random Access Memory, abbreviation RAM）, magnetic disc or CD etc. are various can be with store program codes
Medium.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, and appoints
What those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as
It is accurate.
Claims (12)
1. a kind of laser, it is characterised in that the laser includes：Laser produces area, regulatory region and laser reflection area；
The laser produces area, produces the light of at least two different wave lengths after high speed modulated signal for loading, and described at least two
The light of individual different wave length reaches the laser reflection area by the regulatory region；
The laser reflection area, for the light reflection in the light of at least two different wave length to be produced into reflected light, institute
State reflected light and return to the laser generation area by the regulatory region, the wavelength of the reflected light produces swashing for area with the laser
Wavelength is identical corresponding to emission mode；
The laser produces area and is additionally operable to according to the reflection photogenerated transmitting light.
2. laser according to claim 1, it is characterised in that including：
The bottom of the laser is provided with common substrate, the common substrate is used to protect the laser, the laser
Produce area, regulatory region and laser reflection area and share the common substrate；
The top layer of the laser is provided with public covering, the public covering is used to protect the laser, the laser
Produce area, regulatory region and laser reflection area and share the public covering.
3. laser according to claim 2, it is characterised in that the laser, which produces area, to be included：
Ducting layer, grating is etched with the ducting layer, the ducting layer is arranged in the common substrate；
Quantum well layer, the quantum well layer are arranged between the public covering and the grating.
4. laser according to claim 2, it is characterised in that the laser, which produces area, to be included：
Quantum well layer, the quantum well layer are arranged between the public covering and the common substrate；
Grating is etched with the quantum well layer.
5. the laser according to claim 3 or 4, it is characterised in that the quantum well layer is used to produce multiple different ripples
Long light, the grating are used to screen the light of multiple different wave lengths caused by the quantum well layer, described to obtain
The light of at least two different wave lengths；
The grating is equally distributed grating.
6. laser according to claim 2, it is characterised in that the regulatory region includes：
Ducting layer, the ducting layer are arranged between the public covering and the common substrate.
7. laser according to claim 2, it is characterised in that the laser reflection area includes：
Ducting layer, is etched with grating on the ducting layer, and the ducting layer is arranged on the public covering and the public lining
Between bottom；
The grating is equally distributed grating.
8. laser according to claim 1, it is characterised in that the laser also includes：
Adjustment module, for when the chirp value of transmitting light is unsatisfactory for preparatory condition, being adjusted to the refractive index of the regulatory region
Section.
9. a kind of light signal modulating method, it is characterised in that methods described includes：
The light that area produces at least two different wave lengths, the light of at least two different wave length are produced after loading high speed modulated signal
Laser reflection area is reached by regulatory region；
Light reflection in the light of at least two different wave length is produced into reflected light, the reflected light passes through the regulation
Area returns to the laser and produces area, the wavelength of reflected light wavelength phase corresponding with the excitation mode that the laser produces area
Together；
According to the reflection photogenerated transmitting light.
10. according to the method for claim 9, it is characterised in that the light for producing at least two different wave lengths includes：
The light of multiple different wave lengths is produced, and the light of multiple different wave lengths caused by the quantum well layer is screened, so as to
Obtain the light of at least two different wave length.
11. the method according to claim 9 or 10, it is characterised in that methods described also includes：
When the chirp value for launching light is unsatisfactory for preparatory condition, the refractive index of the regulatory region is adjusted.
12. a kind of optical network system, the optical network system comprises at least：Optical line terminal and multiple optical network units, it is special
Sign is that the optical line terminal and/or the multiple optical network unit include the laser as described in claim 1 to 8 is any
Device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/083601 WO2015039273A1 (en) | 2013-09-17 | 2013-09-17 | Laser device, optical signal modulation method and optical network system |
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| Publication Number | Publication Date |
|---|---|
| CN104756332A CN104756332A (en) | 2015-07-01 |
| CN104756332B true CN104756332B (en) | 2017-12-15 |
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| CN201380001772.0A Active CN104756332B (en) | 2013-09-17 | 2013-09-17 | A kind of laser, light signal modulating method and optical network system |
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| US5177758A (en) * | 1989-06-14 | 1993-01-05 | Hitachi, Ltd. | Semiconductor laser device with plural active layers and changing optical properties |
| CN1452284A (en) * | 2003-05-01 | 2003-10-29 | 清华大学 | Distributed feedback semiconductor laser and electric absorption modulator integrated light source and mfg. method |
| CN1913261A (en) * | 2005-08-11 | 2007-02-14 | 优迪那半导体有限公司 | Semiconductor laser, control method thereof, optical element and laser device |
| CN102742099A (en) * | 2011-12-20 | 2012-10-17 | 华为技术有限公司 | Laser, passive optical network system and apparatus, and control method of laser |
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| CN104756332A (en) | 2015-07-01 |
| WO2015039273A1 (en) | 2015-03-26 |
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