CN106877971A - A kind of wavelength accuracy control method and device - Google Patents
A kind of wavelength accuracy control method and device Download PDFInfo
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- CN106877971A CN106877971A CN201710008117.8A CN201710008117A CN106877971A CN 106877971 A CN106877971 A CN 106877971A CN 201710008117 A CN201710008117 A CN 201710008117A CN 106877971 A CN106877971 A CN 106877971A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0238—Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths
- H04J14/0239—Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths in WDM-PON sharing multiple downstream wavelengths for groups of optical network units [ONU], e.g. multicasting wavelengths
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- 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
- H04B10/572—Wavelength control
Abstract
The invention discloses a kind of wavelength accuracy control method and device, the method includes：Receive the control signal of the first level and second electrical level periodically switching；When control signal switches to the first level by second electrical level, the temperature of optical filter is adjusted to first object temperature, allows the wave band for passing through to be adjusted to first band, the wave band of the optical signal that first band continuously sends out comprising laser optical filter；When control signal switches to second electrical level by the first level, the temperature of optical filter is adjusted to the second target temperature, allows the wave band for passing through to be adjusted to second band, the wave band of the optical signal that second band continuously sends out not comprising laser optical filter.The wave band that optical filter allows to pass through is adjusted by adjusting the temperature of optical filter, the optical signal that laser continuously sends out is blocked by optical filter under burst mode or by optical filter, it is ensured that the wavelength accuracy under burst mode.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of wavelength accuracy control method and device.
Background technology
At present in the EPON TWDM-PON based on time-division and wavelength-division multiplex, an OLT configures multiple ONU optical modes
Block (such as 32), for down direction, OLT is broadcast transmission, and each ONU optical module continuously receives broadcast singal, at present, light
Module can support wavelength accuracy requirement under continuous mode, and running hours can be accurately debugged by wavemeter when module is dispatched from the factory
Wavelength is to provision wavelengths.For up direction, this multiple ONU needs time-sharing work, sends upward signal to OLT successively, therefore
For each ONU optical module, the transmission of upward signal is to send once at regular intervals, therefore it is required that ONU optical modes
Block will quickly be opened when upward signal is sent, and the quick closedown when upward signal is not sent, this pattern is referred to as burst work
Pattern.Therefore, for user terminal optical module, it is necessary to support burst transmissions, that is, realize that quick laser is luminous and closes.
User terminal ONU optical modules use DWDM (Dense Wavelength Division Multiplexing, intensive ripple
Divide multiplexing) mode uplink optical signal, DWDM can be realized in same optical fiber, different wavelength while being combined and passing
Defeated, wavelength accuracy requirements of the DWDM to uplink optical signal is very strict.
But, because laser is quickly opened under burst mode, laser temperature can change rapidly, and laser wavelength with
Temperature is strong correlation amount, and temperature change causes wave length shift, has a strong impact on wavelength accuracy, on the one hand can cause the light of own channels
Energy reduction, influences upstream sensitivity；The opposing party can cause the crosstalk of adjacency channel, disturb the ONU systems on other wavelength, meeting
Module occur cannot normally reach the standard grade, and cause system cisco unity malfunction.
To sum up, ONU optical modules quickly open the wave length shift of generation under burst mode because of laser, have had a strong impact on
The stabilization of system and operation, burst mode of operation must be supported for user terminal optical module, but, not yet propose at present a kind of
The technical scheme of wavelength accuracy of the ONU optical modules under burst mode can be improved.
The content of the invention
The embodiment of the present invention provides a kind of wavelength accuracy control method and device, is used to improve ONU optical modules in burst mould
Wavelength accuracy under formula.
The embodiment of the present invention provides a kind of wavelength accuracy control method, including：
Receive the control signal of the first level and second electrical level periodically switching；
When the control signal switches to the first level by second electrical level, the temperature of the optical filter is adjusted to first
Target temperature, allows the wave band for passing through to be adjusted to first band the optical filter, and the first band is held comprising laser
The wave band of the optical signal that supervention goes out；
When the control signal switches to second electrical level by the first level, the temperature of the optical filter is adjusted to second
Target temperature, allows the wave band for passing through to be adjusted to second band the optical filter, and the second band swashs not comprising described
The wave band of the optical signal that light device continuously sends out.
The embodiment of the present invention also provides a kind of wavelength accuracy control device, including：
Receiving unit, the control signal for receiving the first level and second electrical level periodically switching；
Processing unit, for when the control signal switches to the first level by second electrical level, by the optical filter
Temperature is adjusted to first object temperature, allows the wave band for passing through to be adjusted to first band, the first wave optical filter
The wave band of the optical signal that section continuously sends out comprising laser；
The processing unit, is additionally operable to when the control signal switches to second electrical level by the first level, by the filter
The temperature of mating plate is adjusted to the second target temperature, allows the wave band for passing through to be adjusted to second band the optical filter, described
The wave band of the optical signal that second band continuously sends out not comprising the laser.
Because optical filter allows the wave band that optical signal passes through adjustable, optical filter can be adjusted by adjusting the temperature of optical filter
The wave band for allowing optical signal to pass through.In order to ensure the wavelength accuracy of the optical signal under burst mode, laser continuous illumination is made, be
Periodic output optical signal between realizing module under the burst mode of operation, default first level is cut with second electrical level periodicity
The control signal changed triggers the temperature adjustment of optical filter, and when control signal switches to the first level, control signal is
Burst_on is instructed, and makes optical filter allow optical signal to pass through by adjusting the temperature of optical filter, and then module can be normally defeated
Optical signals；When control signal switches to second electrical level, control signal is instructed for burst_off, by adjusting optical filter
Temperature makes the optical filter block optical signal, and then module can not export optical signal.Specifically, when control signal is cut by second electrical level
It is first object temperature, the wave band that the optical filter is allowed to pass through by adjusting the temperature of optical filter when being changed to the first level
It is adjusted to first band；When the control signal of burst mode switches to second electrical level by the first level, by adjusting optical filter
Temperature be the second target temperature, allow the wave band for passing through to be adjusted to second band the optical filter；Due to first band energy
The optical signal that laser continuously sends out enough is allowed to pass through, second band does not allow the optical signal that laser continuously sends out to pass through, and enters
And the burst mode of operation of module is realized on the premise of the wavelength accuracy of the optical signal that laser continuously sends out is ensured.
Brief description of the drawings
Fig. 1 is provided in an embodiment of the present invention a kind of with bias current increase, the middle cardiac wave of the optical signal that laser sends
The schematic diagram that red shift occurs long；
Fig. 2 is a kind of method flow diagram of wavelength accuracy control method provided in an embodiment of the present invention；
Fig. 3 is a kind of method flow diagram of wavelength accuracy control method provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of optical module provided in an embodiment of the present invention；
Fig. 5 is that a kind of optical filter temperature (30~50 DEG C) provided in an embodiment of the present invention is right with the specific wavelength of optical filter
Should be related to；
Fig. 6 is a kind of structural representation of wavelength accuracy control device provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of control signal provided in an embodiment of the present invention.
Specific embodiment
Embodiments of the invention are illustrated below in conjunction with the accompanying drawings.
For ONU optical modules, it is desirable to which wavelength accuracy is ± 12.5Ghz, i.e. ± 0.1nm, it is desirable to which wavelength interval is 100Ghz,
And wavelength interval is 0.8nm.Usual ONU optical modules are under burst mode, it is necessary to when sending upward signal, be controlled according to burst_on
Signal processed, control laser is quickly opened, and when not sending upward signal, according to burst_off control signals, control laser is fast
Speed is closed.Generally realize whether laser lights by the way of whether to laser loading bias current, i.e. basis
Burst_on control signals, bias current is loaded to laser, laser is quickly opened and luminous；Controlled according to burst_off
Signal processed, does not load bias current to laser, makes laser quick closedown, so as to realize the burst transmissions of optical module.
Because laser is after a period of time of heating up, the transmitting optical signal of ability output center wavelength stabilization, and optical mode
The burst transmissions requirement laser of block quickly exports optical signal, so, in order that laser quickly sends meets target wavelength
Optical signal, can increase the bias current being carried on laser.But according to laser self character, it is carried in the inclined of laser
Put electric current bigger, wavelength is (red shift) more long, therefore under burst mode, with the loading of bias current, the wavelength meeting of optical module
Generation red shift.For example, by taking existing wavelength as an example, it can be deduced that the test result in table 1：
Table 1
According to table 1 and Fig. 1, under burst mode, with the increase of bias current, bias current is gradually increased to by 30mA
132mA, although the monitoring voltage for the thermistor feedback of monitoring laser temperature is all 546mV, but launches optical signal
Centre wavelength has but increased to 1533.181nm by 1532.485nm, and wavelength there occurs 0.7nm.For ONU optical modules, two ripples
Space requirement long is 0.8nm, and wavelength accuracy will ensure ± 0.2nm at least, and the wavelength shift of 0.7nm considerably beyond
The requirement of 0.2nm, this can cause module when unlatching is happened suddenly, and wavelength has the skew of 0.7nm, so that optical signal is crosstalked into phase
Adjacent passage, so as to cause the system cannot normal work.
It is too big in order to solve the wavelength shift under burst mode of ONU optical modules, the wavelength accuracy required much larger than module
Problem, it was found by the inventors of the present invention that filter plate, especially bandpass filter, allow optical signal to pass through in specific wave band, and
Deviate two optical signals beyond this wave band to be prevented from.And inventor has found, bandpass filter is at different temperatures, specific
Wave band can change.
Based on this, in order to improve the wavelength accuracy of transmitting optical signal of the ONU optical modules under burst mode, can carry out as follows
Improve：On the one hand, according to burst_on control signals, optical filter can be adjusted by controlling the temperature of optical filter allows optical signal
The specific band for passing through, makes the optical signal of target wavelength pass through specific band；According to burst_off control signals, by control
The temperature of optical filter allows the specific band that passes through of optical signal adjusting optical filter, prevents the optical signal of target wavelength from by spy
Standing wave section.On the other hand, in order that launching the sufficient center wavelength accuracy of optical signal, under burst mode, in the laser of ONU optical modules
Bias current, i.e. laser are continuously applied on device long always luminous, the output wavelength for so ensuring that laser is stable, is made
The sufficient center wavelength accuracy of the optical signal that laser sends is obtained in target wavelength, and then ensures the transmitting optical signal under burst mode
Wavelength accuracy satisfaction ± 0.1nm.
The optical filter of the embodiment of the present invention is adjustable optical filter, that is, allow the specific band that optical signal passes through adjustable, specifically
It is that the specific band for allowing optical signal to pass through is adjusted by adjusting the temperature of optical filter.When the control signal of burst mode is
During burst_on, laser is in luminance long, optical filter is passed through by the operating temperature for setting optical filter
The operation wavelength of laser, the centre wavelength of the optical signal that the operation wavelength of laser sends for laser, so that module can be with
Export the upward signal using the operation wavelength of laser as carrier；When the control signal of burst mode is burst_off, swash
Light device remains in luminance long, and the operation wavelength for making laser by the operating temperature for setting optical filter cannot be by filter
Mating plate, although laser is luminance long, due to the buffer action of optical filter, causes to make with the operation wavelength of laser
For carrier upward signal cannot slave module output, be capable of achieving burst mode control signal be burst_off when, output light letter
Number luminous power be -70dBm requirement.
Foregoing invention design based on the embodiment of the present invention, the embodiment of the present invention provides a kind of wavelength accuracy control method,
It is mainly used in ONU optical modules, as shown in Fig. 2 the method flow mainly includes：
Step 201, receives the control signal of the first level and second electrical level periodically switching；
Step 202, when control signal switches to the first level by second electrical level, first is adjusted to by the temperature of optical filter
Target temperature, allows the wave band for passing through to be adjusted to first band optical filter, and first band continuously sends out comprising laser
The wave band of optical signal；
Step 203, when control signal switches to second electrical level by the first level, second is adjusted to by the temperature of optical filter
Target temperature, allows the wave band for passing through to be adjusted to second band optical filter, and second band continuously sends out not comprising laser
Optical signal wave band.
Above method flow is performed by wavelength accuracy control device, and the wavelength accuracy control device can be arranged on micro-control
In device MCU processed, it is also possible to be provided separately within optical filter TEC controllers.
As shown in figure 4, a kind of internal structure schematic diagram of optical module provided in an embodiment of the present invention, including MCU, optical filter
TEC controls circuit, optical filter TEC, optical filter, laser, and biased electrical flow control circuit.Wherein, optical filter is arranged on filter
On mating plate TEC, the temperature of optical filter is adjusted by the TEC of optical filter, and MCU is connected with biased electrical flow control circuit, bias current
Control circuit is connected with laser, and the output end of laser is connected with optical filter, and MCU continues to be sent to biased electrical flow control circuit
Signal, make biased electrical flow control circuit continue to laser load bias current, laser according to persistently load bias current,
The optical signal of lasting output stabilization.Optical filter launches the intermediate conversion device of optical port as the output end of laser with module,
For receiving the optical signal that laser is persistently exported, and optical signal can be launched to output at module optical port under burst mode,
Or isolate the optical signal so that the optical signal is not exported at module transmitting optical port.
In the embodiment of the present invention, the optical signal that laser continuously sends out is laser according to the bias current of lasting loading
The centre wavelength of lasting output is the optical signal of target wavelength (target wave band).Under burst mode, in the laser of ONU optical modules
Bias current, i.e. laser are continuously applied on device long always luminous, the output wavelength for so ensuring that laser is stable, is made
The sufficient center wavelength accuracy of the optical signal that laser sends is obtained in target wavelength, and then ensures the transmitting optical signal under burst mode
Wavelength accuracy satisfaction ± 0.1nm.
In the embodiment of the present invention, in order to realize module under the burst mode of operation between periodic output optical signal, pass through
First level triggers the temperature adjustment of optical filter with the control signal of second electrical level periodically switching, in the embodiment of the present invention,
Control signal is that system equipment (main equipment where ONU optical modules) is sent to the control signal of ONU optical modules.Optionally, such as
Shown in Fig. 7, the first level of control signal is high level, and the second electrical level of control signal is low level, and the first level is
Burst_on is instructed, and for indicating to make optical signal by optical filter, second electrical level is instructed for burst_off, for indicating to make light
Nonpassage of signal crosses optical filter.Optionally, the first level of control signal is alternatively low level, and the second electrical level of control signal also may be used
It is high level.
In a kind of optional embodiment, MCU is connected (dotted line in reference picture 4) with the TEC of optical filter, under burst mode,
The control signal that MCU reception systems equipment (main equipment where ONU optical modules) sends, controls for the wavelength accuracy in MCU
For device, when the control signal for receiving is burst_on instructions (level of control signal is the first level), to optical filtering
The TEC of piece sends temperature adjusted value, and quickly the temperature of optical filter is adjusted by TEC, and then makes the light that laser continuously sends out
Signal can be by optical filter, so as to output optical signal at module transmitting optical port.Control signal is being received for burst_off
During instruction (level of control signal is second electrical level), temperature adjusted value is sent to the TEC of optical filter, by TEC come fast velocity modulation
The temperature of entire filter mating plate, and then the optical signal that laser continuously sends out can not be by optical filter, equivalent to optical signal by optical filter
Isolate out, so that can not be to output optical signal at module transmitting optical port.
In a kind of optional embodiment, reference picture 4, optical filter TEC control circuits are connected with the TEC of optical filter, or filter
While mating plate TEC control circuits are connected with the TEC of optical filter, optical filter TEC control circuits are also connected with MCU.By optical filter
TEC control circuits are responsible for adjusting the temperature of optical filter, and under burst mode, optical filter TEC control circuits directly receive system and set
Should to optical filter TEC control circuit forwardings after the standby control signal for issuing, or the control signal that issues of MCU reception system equipment
Control signal.For the wavelength accuracy control device in optical filter TEC control circuits, it is in the control signal for receiving
During burst_on instructions (level of control signal is the first level), temperature adjusted value is sent to the TEC of optical filter, by TEC
The temperature of optical filter quickly is adjusted, and then allows the optical signal that laser continuously sends out by optical filter, so as to module
Optical signal is exported at transmitting optical port.Control signal is received, for burst_off instructions, (level of control signal is the second electricity
It is flat) when, temperature adjusted value is sent to the TEC of optical filter, held come the quick temperature for adjusting optical filter, and then laser by TEC
The optical signal that supervention goes out can not be isolated out equivalent to optical signal by optical filter by optical filter, so that can not be to module launching light
Optical signal is exported at mouthful.
In the embodiment of the present invention, module is ONU optical modules, and the optical signal that laser sends is used to transmit ONU modules
Row signal, the transmission of upward signal is to send at regular intervals once.Because the wave band that optical filter permission optical signal passes through can
Adjust, the wave band that optical filter allows optical signal to pass through can be adjusted by adjusting the temperature of optical filter.In order under ensureing burst mode
Optical signal wavelength accuracy, make laser continuous illumination, in order to realize module under the burst mode of operation between it is periodically defeated
Optical signals, default first level triggers the temperature adjustment of optical filter with the control signal of second electrical level periodically switching,
When control signal switches to the first level, control signal is instructed for burst_on, and optical filtering is made by adjusting the temperature of optical filter
Piece allows optical signal to pass through, and then module can normally export optical signal；When control signal switches to second electrical level, control letter
Number it is burst_off instructions, optical filter is blocked optical signal by adjusting the temperature of optical filter, and then module is unable to output light
Signal.In the embodiment of the present invention, optical filter allows the presence of following corresponding relation between the wave band for passing through and optical filter temperature, bag
Include：Each temperature value correspondence one of optical filter allows the wave band for passing through, with the rising of temperature, it is allowed to which the wave band for passing through occurs
Red shift.Optionally, each temperature value correspondence one of optical filter allows the wave band that passes through, and each wave band wavelength width phase
Deng.
Fig. 5 illustrate the temperature (in the range of 30 DEG C~50 DEG C) of optical filter with can be by the corresponding of the wave band of optical filter
Relation, according to Fig. 5, optical filter at different temperatures, corresponds to different wave bands respectively, is 30 in the temperature of optical filter e.g.
DEG C when, optical filter allows the wave band that passes through for 1531.58nm~1531.98nm, when the temperature of optical filter is 40 DEG C, optical filter
It is 1532.58nm~1532.98nm to allow the wave band that the optical signal of target wavelength passes through, when the temperature of optical filter is 50 DEG C,
It is 1533.58nm~1533.98nm that optical filter allows the wave band that the optical signal of target wavelength passes through, and with the temperature of optical filter
Degree is raised, it is allowed to which the wave band that the optical signal of target wavelength passes through there occurs red shift.And the wavelength of each temperature correspondence wave band is wide
It is 0.4nm to spend.
There is following corresponding relation, the embodiment of the present invention between allowing the wave band that passes through and optical filter temperature based on optical filter
In, step 202, including：When control signal switches to the first level by second electrical level, according to the light letter that laser continuously sends out
Number wave band and above-mentioned corresponding relation, determine the first object temperature of optical filter；Wherein, first object temperature is corresponding allows to lead to
The wave band crossed is first band, the wave band of the optical signal that first band continuously sends out comprising laser；Obtain the temperature of optical filter
Sampled value, according to temperature sampling value and first object temperature, determines the temperature adjusted value of optical filter；Sent to the TEC of optical filter
Temperature adjusted value, so that the temperature of optical filter is adjusted to target temperature by TEC.
In the embodiment of the present invention, step 203, including：When control signal switches to second electrical level by the first level, according to
The wave band and corresponding relation of the optical signal that laser continuously sends out, determine the second target temperature of optical filter, the second target temperature
The corresponding wave band for allowing to pass through is second band, the wave band of the optical signal that second band continuously sends out not comprising laser；Obtain
The temperature sampling value of optical filter is taken, according to temperature sampling value and the second target temperature, the temperature adjusted value of optical filter is determined；To filter
The TEC of mating plate sends temperature adjusted value, so that the temperature of optical filter is adjusted to target temperature by TEC.
Optionally, the wave band of the optical signal for being continuously sent out for laser, and optical filter allows the wave band for passing through and filters
The corresponding relation existed between mating plate temperature, the optical filter that the optical signal that can pre-set out can send laser passes through
First object temperature (including at least one temperature value or temperature range), and pre-set the light letter that blocking laser device sends
Second target temperature (including at least one temperature value or temperature range) of number optical filter for passing through.So, it is optional to implement
In example, step 202, including：When control signal switches to the first level by second electrical level, the temperature sampling of optical filter is obtained
Value, according to temperature sampling value and the first object temperature for pre-setting, determines the temperature adjusted value of optical filter；To optical filter
TEC sends temperature adjusted value, so that the temperature of optical filter is adjusted to target temperature by TEC.Step 203, including：In control signal
When switching to second electrical level by the first level, the temperature sampling value of optical filter is obtained, according to temperature sampling value and pre-set
Second target temperature, determines the temperature adjusted value of optical filter；Temperature adjusted value is sent to the TEC of optical filter, so that TEC will filter
The temperature of piece is adjusted to target temperature.
An example is set forth below to illustrate above-mentioned steps 202 and step 203, as shown in figure 3, including following step
Suddenly：
Step 301, receives the temperature sampling value of control signal and optical filter, is the first level in the level of control signal
When, perform step 302 to step 305；
When the level of control signal is second electrical level, step 306 is performed to step,
Step 302, the corresponding relation between allowing the wave band that passes through and optical filter temperature according to optical filter, determines optical filter
The corresponding wave band of temperature sampling value；
Whether step 303, judge the wave band of the optical signal that laser continuously sends out in the corresponding wave band of temperature sampling value
It is interior, if so, terminate, if it is not, performing step 304.
Step 304, the corresponding relation between allowing the wave band that passes through and optical filter temperature according to optical filter, determines optical filter
First object temperature value, the wave band of the optical signal that laser continuously sends out is not in the corresponding wave band of first object temperature value
In (first band)；
Step 305, according to temperature sampling value and first object temperature value, determines the temperature adjusted value of optical filter, and to filter
The TEC of mating plate sends temperature adjusted value；
Step 306, the corresponding relation between allowing the wave band that passes through and optical filter temperature according to optical filter, determines optical filter
The corresponding wave band of temperature sampling value；
Whether step 307, judge the wave band of the optical signal that laser continuously sends out in the corresponding wave band of temperature sampling value
It is interior, if it is not, terminate, if so, performing step 308.
Step 308, the corresponding relation between allowing the wave band that passes through and optical filter temperature according to optical filter, determines optical filter
The second target temperature value, the wave band of the optical signal that laser continuously sends out is not in the corresponding wave band of the second target temperature value
In (second band)；
Step 309, according to temperature sampling value and the second target temperature value, determines the temperature adjusted value of optical filter, and to filter
The TEC of mating plate sends temperature adjusted value.
For example, the centre wavelength of transmitting optical signal is set to target wavelength 1532.68nm, if monitoring the temperature of optical filter
Degree sampled value is 40 DEG C, the corresponding 1532.48~1532.98nm of specific band of optical filter, now 40 DEG C of correspondences of temperature sampling value
Specific band can just pass through transmitting optical signal, if now receiving control signal under burst mode for burst_on refers to
Order, then need not adjust the temperature of optical filter, and the transmitting optical signal of 1532.68nm directly by optical filter and is exported to optical module
At optical port.If now receiving the control signal under burst mode for burst_off is instructed, need to adjust the temperature of optical filter,
Prevent the transmitting optical signal of 1532.68nm from by the specific band corresponding to the temperature after optical filter adjustment.
If, the temperature of optical filter often raises 1 DEG C, the boundary wavelength red shift 0.1nm of specific band, then when the temperature of optical filter
When degree sampled value is 41 DEG C, the corresponding 1532.58~1533.08nm of specific band of optical filter, when the temperature sampling value of optical filter
For 42 DEG C when, the corresponding 1532.68~1533.18nm of specific band of optical filter, when optical filter temperature sampling value be 43 DEG C when,
Corresponding 1532.78~the 1533.28nm of specific band of optical filter.
Therefore, optionally, the temperature of optical filter can be heightened, prevents the transmitting optical signal of 1532.68nm from passing through.If connecing
The control signal under burst mode is received for burst_off is instructed, then needs for the target temperature value of optical filter to be at least adjusted to 43
DEG C or more than 43 DEG C, prevent the transmitting optical signal of 1532.68nm from passing through.Because temperature adjusted value is smaller, so the temperature of optical filter
Degree will soon reach target temperature value, be capable of achieving the control signal under quickly response burst mode.
Optionally, the temperature of optical filter can also be turned down, prevents the transmitting optical signal of 1532.68nm from passing through.For example, working as
When the temperature sampling value of optical filter is 36 DEG C, the corresponding 1532.18~1532.58nm of specific band of optical filter, therefore, also can be by
The target temperature of optical filter prevents the transmitting optical signal of 1532.68nm from passing through to being at least adjusted to 36 DEG C or less than 36 DEG C.Cause
Temperature adjusted value is smaller, so the temperature of optical filter will soon reach target temperature value, is capable of achieving quickly response burst mould
Control signal under formula.
Again for example, the temperature sampling value for detecting optical filter is 36 DEG C, the mapping table according to Fig. 5, optical filter
Corresponding 1532.18~1532.58nm of specific band, the specific band can not pass through the optical signal of 1532.68nm, now
If the control signal under receiving burst mode is burst_off instructions, the temperature of optical filter need not be adjusted, optical filter will
The optical signal isolation of 1532.68nm.If now receiving the control signal under burst mode for burst_on is instructed, need to filter
The target temperature value of mating plate any temperature in being adjusted to 37~42 DEG C, enables the transmitting optical signal of 1532.68nm to pass through.According to figure
Mapping table shown in 5, can deduce 37 DEG C of corresponding specific bands for 1532.28~1532.68nm, and 42 DEG C corresponding
Specific band is 1532.68~1533.08nm.
Optionally, also the target temperature value of optical filter can be adjusted to 38 DEG C, the transmitting optical signal of 1532.68nm is led to
Cross, the mapping table according to Fig. 5,38 DEG C of corresponding specific bands are 1532.38~1532.78nm.
Optionally, also the target temperature value of optical filter can be adjusted to 40 DEG C, the transmitting optical signal of 1532.68nm is led to
Cross, the mapping table according to Fig. 5,40 DEG C of corresponding specific bands are 1532.48~1532.88nm.
The embodiment of the present invention is only when illustrating the temperature of optical filter in the range of 30 DEG C~50 DEG C, optical filter it is specific
Wave band it is adjustable, and the wavelength under the burst mode realized based on this precise control.For other temperature sections, such as low temperature (-
40 DEG C~30 DEG C) or during high temperature (50 DEG C~100 DEG C), if also correspond to respectively allowed by the specific band of optical filter,
Corresponding specific band carries out optical signal that laser continuously sends out under burst mode respectively to may be based on these temperature sections
Wavelength accuracy is controlled.
Transmitting optical signal of the embodiment of the present invention with target wavelength as 1532.68nm carries out example, but the present invention is implemented
The target wavelength of example can be other wavelength or wave band, however it is not limited to this target wavelength, specifically can be according to the up letter of ONU optical modules
Number operation wavelength determine.
Based on above method flow, the embodiment of the present invention also provides a kind of wavelength accuracy control device, as shown in fig. 6, bag
Include：
Receiving unit 601, the control signal for receiving the first level and second electrical level periodically switching；
Processing unit 602, for when control signal switches to the first level by second electrical level, the temperature of optical filter being adjusted
Whole is first object temperature, allows the wave band for passing through to be adjusted to first band optical filter, and first band is held comprising laser
The wave band of the optical signal that supervention goes out；
Processing unit 602, is additionally operable to when control signal switches to second electrical level by the first level, by the temperature of optical filter
The second target temperature is adjusted to, allows the wave band for passing through to be adjusted to second band optical filter, second band does not include laser
The wave band of the optical signal that device continuously sends out.
The temperature of optical filter allows the wave band for passing through to there is following corresponding relation with optical filter：
Each temperature value correspondence one of optical filter allows the wave band for passing through, with the rising of temperature, it is allowed to the ripple for passing through
Duan Fasheng red shifts.
Optionally, the wavelength width of each wave band is equal.
Optionally, processing unit 602 specifically for：When control signal switches to the first level by second electrical level, according to
Corresponding relation, determines first object temperature, and the corresponding wave band for allowing to pass through of first object temperature is first band；
The temperature sampling value of optical filter is obtained, according to temperature sampling value and first object temperature, the temperature of optical filter is determined
Adjusted value；
Temperature adjusted value is sent to the semiconductor cooler TEC of optical filter by transmitting element 603, so that TEC will filter
The temperature of piece is adjusted to target temperature.
Optionally, processing unit 602 specifically for：When control signal switches to second electrical level by the first level, according to
The wave band and corresponding relation of the optical signal that laser continuously sends out, determine the second target temperature, and the second target temperature is corresponding to be permitted
Perhaps the wave band for passing through is second band；
The temperature sampling value of optical filter is obtained, according to temperature sampling value and the second target temperature, the temperature of optical filter is determined
Adjusted value；
Temperature adjusted value is sent to the semiconductor cooler TEC of optical filter by transmitting element 603, so that TEC will filter
The temperature of piece is adjusted to target temperature.
In above-described embodiment, because optical filter allows the wave band that passes through of optical signal adjustable, can be by adjusting the temperature of optical filter
Spend to adjust the wave band that optical filter allows optical signal to pass through.In order to ensure the wavelength accuracy of the optical signal under burst mode, order swashs
Light device continuous illumination, in order to realize module under the burst mode of operation between periodic output optical signal, preset the first level with
The control signal of second electrical level periodically switching triggers the temperature adjustment of optical filter, and the first level is switched in control signal
When, control signal is instructed for burst_on, makes optical filter allow optical signal to pass through by adjusting the temperature of optical filter, Jin Ermo
Block can normally export optical signal；When control signal switches to second electrical level, control signal is instructed for burst_off, is passed through
The temperature of optical filter is adjusted optical filter is blocked optical signal, and then module can not export optical signal.Specifically, working as control signal
When switching to the first level by second electrical level, by adjusting the temperature of optical filter, the wave band for passing through is allowed to be adjusted to optical filter
First band；When the control signal of burst mode switches to second electrical level by the first level, by adjusting the temperature of optical filter,
The wave band for passing through is allowed to be adjusted to second band optical filter；Because first band allows the optical signal that laser continuously sends out to lead to
Cross, second band does not allow the optical signal that laser continuously sends out to pass through, and then ensureing the optical signal that laser continuously sends out
Wavelength accuracy on the premise of realize the burst mode of operation of module.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of wavelength accuracy control method, it is characterised in that including：
Receive the control signal of the first level and second electrical level periodically switching；
When the control signal switches to the first level by second electrical level, the temperature of the optical filter is adjusted to first object
Temperature, allows the wave band for passing through to be adjusted to first band the optical filter, and the first band is persistently sent out comprising laser
The wave band of the optical signal for going out；
When the control signal switches to second electrical level by the first level, the temperature of the optical filter is adjusted to the second target
Temperature, allows the wave band for passing through to be adjusted to second band the optical filter, and the second band does not include the laser
The wave band of the optical signal for continuously sending out.
2. the method for claim 1, it is characterised in that the temperature of the optical filter allows what is passed through with the optical filter
There is following corresponding relation in wave band：
Each temperature value correspondence one of the optical filter allows the wave band for passing through, with the rising of temperature, it is allowed to the ripple for passing through
Duan Fasheng red shifts.
3. method as claimed in claim 2, it is characterised in that the wavelength width of each wave band is equal.
4. method as claimed in claim 2 or claim 3, it is characterised in that switch to first by second electrical level in the control signal
During level, the temperature of the optical filter is adjusted to first object temperature, including：
When the control signal switches to the first level by second electrical level, according to the corresponding relation, first mesh is determined
Mark temperature, the corresponding wave band for allowing to pass through of the first object temperature is the first band；
The temperature sampling value of the optical filter is obtained, according to the temperature sampling value and the first object temperature, it is determined that described
The temperature adjusted value of optical filter；
The temperature adjusted value is sent to the semiconductor cooler TEC of the optical filter, so that the TEC is by the optical filter
Temperature is adjusted to the target temperature.
5. method as claimed in claim 2 or claim 3, it is characterised in that switch to second by the first level in the control signal
During level, the temperature of the optical filter is adjusted to the second target temperature, including：
When the control signal switches to second electrical level by the first level, the optical signal continuously sent out according to the laser
Wave band and the corresponding relation, determine second target temperature, the corresponding wave band for allowing to pass through of second target temperature
It is the second band；
The temperature sampling value of the optical filter is obtained, according to the temperature sampling value and second target temperature, it is determined that described
The temperature adjusted value of optical filter；
The temperature adjusted value is sent to the semiconductor cooler TEC of the optical filter, so that the TEC is by the optical filter
Temperature is adjusted to the target temperature.
6. a kind of wavelength accuracy control device, it is characterised in that including：
Receiving unit, the control signal for receiving the first level and second electrical level periodically switching；
Processing unit, for when the control signal switches to the first level by second electrical level, by the temperature of the optical filter
First object temperature is adjusted to, allows the wave band for passing through to be adjusted to first band, the first band bag optical filter
The wave band of the optical signal continuously sent out containing laser；
The processing unit, is additionally operable to when the control signal switches to second electrical level by the first level, by the optical filter
Temperature be adjusted to the second target temperature, allow the wave band for passing through to be adjusted to second band, described second optical filter
The wave band of the optical signal that wave band continuously sends out not comprising the laser.
7. device as claimed in claim 6, it is characterised in that the temperature of the optical filter allows what is passed through with the optical filter
There is following corresponding relation in wave band：
Each temperature value correspondence one of the optical filter allows the wave band for passing through, with the rising of temperature, it is allowed to the ripple for passing through
Duan Fasheng red shifts.
8. device as claimed in claim 7, it is characterised in that the wavelength width of each wave band is equal.
9. device as claimed in claim 7 or 8, it is characterised in that the processing unit specifically for：
When the control signal switches to the first level by second electrical level, according to the corresponding relation, first mesh is determined
Mark temperature, the corresponding wave band for allowing to pass through of the first object temperature is the first band；
The temperature sampling value of the optical filter is obtained, according to the temperature sampling value and the first object temperature, it is determined that described
The temperature adjusted value of optical filter；
The temperature adjusted value is sent to the semiconductor cooler TEC of the optical filter by transmitting element, so that the TEC will
The temperature of the optical filter is adjusted to the target temperature.
10. device as claimed in claim 7 or 8, it is characterised in that the processing unit specifically for：
When the control signal switches to second electrical level by the first level, the optical signal continuously sent out according to the laser
Wave band and the corresponding relation, determine second target temperature, the corresponding wave band for allowing to pass through of second target temperature
It is the second band；
The temperature sampling value of the optical filter is obtained, according to the temperature sampling value and second target temperature, it is determined that described
The temperature adjusted value of optical filter；
The temperature adjusted value is sent to the semiconductor cooler TEC of the optical filter by transmitting element, so that the TEC will
The temperature of the optical filter is adjusted to the target temperature.
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| CN201710008117.8A CN106877971A (en) | 2017-01-05 | 2017-01-05 | A kind of wavelength accuracy control method and device |
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| CN201710008117.8A CN106877971A (en) | 2017-01-05 | 2017-01-05 | A kind of wavelength accuracy control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019041686A1 (en) * | 2017-08-28 | 2019-03-07 | 武汉电信器件有限公司 | Method for reducing wavelength shift of laser in burst mode, and laser |
| CN111092690A (en) * | 2019-12-27 | 2020-05-01 | 京信通信系统（中国）有限公司 | WDM-based baseband signal transmission device, method, storage medium and electronic device |
| CN111755944A (en) * | 2020-06-18 | 2020-10-09 | 武汉光迅科技股份有限公司 | Laser circuit, laser control method and optical network unit |
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| US20010053265A1 (en) * | 2000-06-16 | 2001-12-20 | Yoshio Yamashita | Optical device for use in detecting the wavelength and intensity of light |
| CN104539370A (en) * | 2014-12-22 | 2015-04-22 | 青岛海信宽带多媒体技术有限公司 | Laser and optical module |
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| WO2019041686A1 (en) * | 2017-08-28 | 2019-03-07 | 武汉电信器件有限公司 | Method for reducing wavelength shift of laser in burst mode, and laser |
| CN111092690A (en) * | 2019-12-27 | 2020-05-01 | 京信通信系统（中国）有限公司 | WDM-based baseband signal transmission device, method, storage medium and electronic device |
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