CN101282179A - Method and system for locking light transmitter output wavelength - Google Patents
Method and system for locking light transmitter output wavelength Download PDFInfo
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- CN101282179A CN101282179A CNA2008101107104A CN200810110710A CN101282179A CN 101282179 A CN101282179 A CN 101282179A CN A2008101107104 A CNA2008101107104 A CN A2008101107104A CN 200810110710 A CN200810110710 A CN 200810110710A CN 101282179 A CN101282179 A CN 101282179A
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Abstract
The present invention discloses a method which can accurately and effectively lock the output wavelength of the light transmitter and a system thereof. The system comprises the following components: an output wavelength variation information collecting circuit, a tube core temperature variation information collection circuit, a feedback signal generation unit and a tube core temperature feedback control unit. The output wavelength variation information collecting circuit is used for collecting the variation information of the output wavelength of the laser. The temperature variation collection circuit is used for collecting the variation information of the tube core temperature of the laser. The feedback signal generation unit is used for processing the output wavelength variation information of the laser and the variation information of the tube core temperature for generating a feedback signal. The tube core temperature feedback control unit is used for regulating the tube core temperature of the laser according to the feedback signal thereby realizing the fixing to the output wavelength of the light transmitter. As the system according to the invention uses a digital circuit for realizing the generation of the feedback signal, the invention has versatility and can be flexibly applied for different light transmitters.
Description
Technical field
The invention belongs to digital fiber transmission system technical field, relate to the locking means and the locking system of light transmitter output wavelength.
Background technology
Close wavelength-division multiplex technology in the optical communication field (DWDM) makes the huge bandwidth resources of optical fiber obtain certain development and use, in order to make full use of the bandwidth of an optical fiber resource, need to increase the transmission capacity of single optical fiber, promote the port number that it can carry to greatest extent.From the principle of dense wavelength division multiplexing system, the interval between the adjacent wavelength is more little, and the number of wavelengths that can transmit in certain wave-length coverage is just many more, and total transmission capacity is just big more.The wavelength-division density of dense wavelength division multiplexing system increases gradually thus, originally the 200GHz that meets the ITU-T standard under a few wavelengths passage is to the interval of 100GHz, to become the system at the interval of 50GHz that meets the ITU-T standard under most wavelength channels even 25GHz, control to light transmitter output wavelength requires also to improve accordingly, for example in 25GHz system at interval, the depart from requirement of the output wavelength of optical sender in life cycle is controlled within the positive and negative 2.5GHz.
In order to improve the stability of output wavelength, existing solution is to adopt a control device of temperature of tube core of laser that the die temperature of laser in the optical sender is controlled, this device mainly comprises: a temperature sensor is used to gather the laser tube core temperature information; An operational amplification circuit is used for the temperature information of temperature sensor collection is regulated; Semiconductor cooler drives (TEC DRIVER), is used for according to the output signal of operational amplification circuit the die temperature of laser being carried out FEEDBACK CONTROL, makes it can keep stable.
After the die temperature of laser settles out, its output wavelength also just can roughly settle out, still, and under the stable situation of tube core, little fluctuation still can take place in the output wavelength of laser, so this solution can not realize the effective locking to light transmitter output wavelength.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of light transmitter output wavelength locking means, adopt this method can compare the output wavelength of optical sender accurately and effectively control, the present invention also will provide a kind of optical sender wavelength locking system for this reason.
For solving the problems of the technologies described above, light transmitter output wavelength locking means of the present invention comprises:
The change information of continuous collecting laser output wavelength, while continuous collecting laser tube core temperature information, both are carried out comprehensive calculation process, and the die temperature of laser is continued FEEDBACK CONTROL, thereby realize locking to light transmitter output wavelength according to the information after this processing.Information after the described comprehensive calculation process shows in order to make the state before output wavelength returns to skew, the regulated quantity that the die temperature of laser should be done.
Described the change information of laser output wavelength and the comprehensive calculation process of laser tube core temperature information are specifically as follows: the change information to described laser output wavelength carries out the computing processing and amplifying, and this result and described laser tube core temperature information is superimposed, then the comprehensive change information that obtains after the stack is carried out the computing processing and amplifying.
Parameter in the two cover computing processing and amplifying functions of described front and back should be determined according to the concrete parameter of laser assembly.
For the laser that carries the laser assembly that is used for die temperature control and output wavelength detection, the method of the change information of described collection laser output wavelength is specifically as follows: the electric current of the described sign luminous power information that is used for the laser assembly output that wavelength detects and the electric current that characterizes the luminous power information that contains wavelength information are converted into voltage by trans-impedance amplifier, carry out differential ratio then, obtain the change information of output wavelength.
For solving the problems of the technologies described above, light transmitter output wavelength locking system of the present invention comprises: output wavelength change information collection circuit, die temperature change information collection circuit, feedback signal generation unit and die temperature feedback control unit; Wherein said output wavelength change information collection circuit is used to gather the change information of laser output wavelength; Described variations in temperature Acquisition Circuit is used to gather the die temperature change information of laser; Described feedback signal generation unit is used for the output wavelength change information of described laser and described die temperature change information are handled, and produces a feedback signal; Described die temperature feedback control unit is used for according to described feedback signal the laser tube core temperature being adjusted, thereby realizes the output wavelength of optical sender is locked.
Described output wavelength change information collection circuit comprises: lens, light separator, optical filter, wavelength detect light sensitive diode, power detection light sensitive diode, trans-impedance amplifier and differential comparator; Wherein the laser that sends of laser is divided into two-way by light separator, one the tunnel through being input to wavelength detection light sensitive diode after the optical filter filtering, the output current that this wavelength detects light sensitive diode has promptly characterized the luminous power relative size that contains wavelength variation information, the direct input power in another road detects light sensitive diode, the output current of this power detection light sensitive diode has characterized the relative size of luminous power, after being converted to voltage by trans-impedance amplifier, the output current of this electric current and wavelength detection light sensitive diode is input in the differential comparator, this differential comparator carries out differential ratio to described two-way voltage, thereby draws described output wavelength change information.
Described die temperature change information collection circuit comprises: temperature sensor and differential comparator; Described temperature sensor is used for the die temperature of laser is gathered, and described differential comparator is used for the output voltage of described temperature sensor and a reference voltage are carried out differential ratio, thereby exports described die temperature change information.Reference voltage is corresponding with certain Wavelength grid of ITU-T definition.In the laser tube core temperature-control circuit of introducing in background technology, the die temperature control circuit will be eliminated the difference of temperature sensor and this reference voltage, and the tube core of laser is set on the fiducial temperature of this reference voltage correspondence.
Described feedback signal generation unit comprises first operational amplification circuit, adder and second operational amplification circuit; Described second operational amplification circuit is used for the output signal of described output wavelength change information collection circuit is carried out the computing processing and amplifying; Described adder is used for the output signal of the output signal of described die temperature change information collection circuit and described second operational amplification circuit is superposeed; Described first operational amplification circuit is used for the output signal of described adder is carried out the computing processing and amplifying, and the output signal of this operational amplification circuit becomes the output signal of unit as described feedback letter bugle call.
The circuit parameter of described first operational amplification circuit and described second operational amplification circuit is calibrated standard really: make circuit stability reach best.
Definite method of the circuit parameter of described first operational amplification circuit can for: disconnect being electrically connected between described adder and described second operational amplification circuit, output at described first operational amplification circuit adds a driving voltage, watch the variation of the signal waveform of the described first operational amplification circuit input by oscilloscope, wherein rise time and the overshoot operational amplification circuit that is minimum signal waveform correspondence promptly is defined as optimal circuit, can effectively guarantee the stable of circuit.
Definite method of the circuit parameter of described second operational amplification circuit can for: after having determined described first operational amplification circuit, connect the electrical connection of whole system, output at described first operational amplification circuit adds a driving voltage, the signal waveform of watching the described second operational amplification circuit input by oscilloscope changes, and wherein second operational amplification circuit of the signal waveform correspondence of rise time minimum promptly is defined as optimal circuit.
Described feedback signal generation unit can adopt Analog Circuit Design also can adopt Design of Digital Circuit, adopt digital circuit more flexible, be convenient to the function parameters of described two computing processing and amplifying be regulated, thereby have more versatility at different lasers.
Adopt the feedback signal generation unit of Design of Digital Circuit to comprise: analog to digital converter, processor and digital to analog converter; The analog signal conversion that described analog to digital converter is used for this unit of input is a digital signal; Described processor is used for the digital signal of described analog to digital converter output is handled, and produces described feedback signal; Described digital to analog converter is used for the digital signal of described processor output is converted to analog signal.
Described processor specifically comprises the first computing amplification module, adder and the second computing amplification module; The described second computing amplification module is used for described wavelength variation information is carried out the computing processing and amplifying; Described adder is used for the output signal of described die temperature change information and the described second computing amplification module is superposeed; The described first computing amplification module is used for the output signal of described adder is carried out the computing processing and amplifying, and the output signal of this computing amplification module is as the output signal of this processor.
Described die temperature feedback control unit comprises that semiconductor cooler and semiconductor cooler drive, and described semiconductor cooler is used for die temperature is regulated and control, and described semiconductor cooler drives and is used for described semiconductor cooler is carried out drive controlling.
For the laser that carries the laser assembly that is used for die temperature control and output wavelength detection, the lens in the described output wavelength change information collection circuit, light separator, optical filter, wavelength detect light sensitive diode, the power detection light sensitive diode all can be the device that this laser carries; Temperature sensor in the described die temperature change information collection circuit can be that this laser carries temperature sensor; Semiconductor cooler in the described die temperature feedback control unit can be the semiconductor cooler that this laser carries.
The beneficial effect of the inventive method is:
The present invention gathers wavelength variation information owing to having increased on the basis of traditional optical sender wavelength control technical scheme, and with the semiconductor cooler drive signal is revised, thereby wavelength locking technical scheme of the present invention can be carried out the wavelength of optical sender accurately and control in real time.For the generation of semiconductor cooler drive signal, the present invention also provides the selection scheme that substitutes traditional analog circuit with digital circuit, thereby makes wavelength locking system of the present invention have versatility, can apply in a flexible way in different optical senders.
Description of drawings
Fig. 1 is the structural representation of optical sender wavelength locking system of the present invention;
Fig. 2 is the partial circuit schematic diagram of output wavelength change information collection unit;
Fig. 3 is a method schematic diagram of determining operational amplification circuit;
Fig. 4 is the equivalent circuit diagram of the first computing amplification module;
Fig. 5 is the equivalent circuit diagram of the second computing amplification module.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the structural representation of optical sender wavelength locking system of the present invention; As shown in the figure, optical sender wavelength locking system of the present invention comprises: output wavelength change information collection circuit, die temperature change information collection circuit, feedback signal generation unit and die temperature feedback control unit.
Wherein said output wavelength change information collection circuit is used to gather the change information of laser output wavelength; Described variations in temperature Acquisition Circuit is used to gather the die temperature change information of laser; Described feedback signal generation unit is used for the output wavelength change information of described laser and described die temperature change information are handled, and produces a feedback signal; Described die temperature feedback control unit is used for according to described feedback signal the laser tube core temperature being adjusted, thereby realizes the output wavelength of optical sender is locked.
Wherein said output wavelength change information collection circuit is used to gather the change information of laser output wavelength, it comprises straight lens, polarized light separator, optical filter, wavelength detects light sensitive diode, the power detection light sensitive diode, trans-impedance amplifier and differential comparator, the laser that laser sends is divided into two-way by polarized light separator, one the tunnel through being input to wavelength detection light sensitive diode after the optical filter filtering, the output current of this wavelength detection light sensitive diode has promptly characterized the relative size of the luminous power of carrying wavelength information, the direct input power in another road detects light sensitive diode, the output current of this power detection light sensitive diode has characterized the relative size of luminous power, the output current of this electric current and wavelength detection light sensitive diode is input in the differential comparator after processing changes voltage into through trans-impedance amplifier, this differential comparator carries out differential ratio to input two-way voltage wherein, thereby draws described output wavelength change information.The partial circuit structure of output wavelength change information collection circuit as shown in Figure 2.
Described die temperature changes the die temperature change information that Acquisition Circuit is used to gather laser, it comprises temperature sensor and differential comparator, described temperature sensor is used for the die temperature of laser is gathered, described differential comparator is used for the output voltage of temperature sensor and a reference voltage are carried out differential ratio, thereby exports described temperature information.
Described feedback signal generation unit is used for described laser output wavelength change information and described die temperature change information are handled, thereby produce a feedback signal, described die temperature feedback control unit can be regulated and control die temperature according to this feedback signal, thereby realizes the locking to light transmitter output wavelength.This unit can adopt analog circuit to realize, also can adopt digital circuit to realize that for analog circuit, its particular circuit configurations is for comprising: first operational amplification circuit, adder and second operational amplification circuit; Described second operational amplification circuit is used for the output signal of described output wavelength change information collection circuit is carried out the computing processing and amplifying; Described adder is used for the output signal of the output signal of described die temperature change information collection circuit and described second operational amplification circuit is superposeed; Described first operational amplification circuit is used for the output signal of described adder is carried out the computing processing and amplifying, and the output signal of this operational amplification circuit becomes the output signal of unit as described feedback letter bugle call.For the scheme that adopts digital circuit, described feedback signal generation unit comprises analog to digital converter, processor and digital to analog converter; The analog signal conversion that described analog to digital converter is used for this unit of input is a digital signal; Described processor is used for the digital signal of described analog to digital converter output is handled, and produces described feedback signal; Described digital to analog converter is used for the digital signal of described processor output is converted to analog signal.
Described processor specifically comprises the first computing amplification module, adder and the second computing amplification module; The described second computing amplification module is used for described wavelength variation information is carried out the computing processing and amplifying; Described adder is used for the output signal of described die temperature change information and the described second computing amplification module is superposeed; The described first computing amplification module is used for the output signal of described adder is carried out the computing processing and amplifying, and the output signal of this computing amplification module is as the output signal of this processor.
No matter be that the employing analog circuit is realized or the employing digital circuit realizes, the determination method for parameter in the described two cover computing processing and amplifying functions is example with the digital circuit all as shown in Figure 3 below, and the definite of these two parameters specified:
Constant is definite among the first computing amplification module C1 (Z): at first the software control part of second integral amplification module is turn-offed, can make the laser steady operation under certain normal operating conditions by the circuit adjustment.On the output Vwc of the first computing amplification module, add the 50mV excitation by software control, can obtain the signal of the first computing amplification module input Vtc signal shown in Figure 3 by oscilloscope or software sampling, the temperature-control circuit of laser is that the circuit of current connection can be thought an inertial element under this kind situation, and its time constant is 1～5S.Parameter τ 1, τ 2 by adjusting C1 (Z) and ts can be so that the circuit stability the bests after the closed loop, and the computing formula of C1 (Z) is:
Wherein τ 1 is an integral constant, and τ 2 is a proportionality constant, and Z is the complex variable in the Z-transformation, and ts is a sampling time interval.In a specific embodiment, the equivalent electric circuit of the first computing amplification module C1 (Z) as shown in Figure 4, then in this embodiment, τ 1=1/R
1C
1, τ 2=1/R
2C
1
The method of adjusting is at first to close the integral part among the C1 (Z), promptly
Be set at 0, the ratio of adjusting τ 2 and τ 1 makes the Vtc signal change concussion into from stable state, add integral part afterwards, it is constant with the ratio of τ 1 to keep τ 2, change size and the sampling time interval ts of τ 1, the rise time Tr1 minimum of the signal Vtc of the input of the first computing amplification module in Fig. 3, overshoot Vt minimum.
Constant is definite among the second computing amplification module C2 (Z): after the parameter that obtains the first computing amplification module C1 (Z), on the output Vwc of the first computing amplification module, add 50mV excitation again, make minimum the getting final product of rise time Tr2 of determining the signal Verr of the first computing amplification module input shown in Figure 3 by the size of adjusting τ 3.The computing formula of C2 (Z) is:
Wherein τ 3 is an integral constant, in this embodiment, the equivalent electric circuit of the second computing amplification module C2 (Z) as shown in Figure 5, then in this embodiment, τ 3=1/R
3C
3
Described die temperature change information collection circuit comprises: temperature sensor and differential comparator; Described temperature sensor is used for the die temperature of laser is gathered, and described differential comparator is used for the output voltage of described temperature sensor and a reference voltage are carried out differential ratio, thereby exports described die temperature change information.
For the laser that carries optical power control circuit, wavelength testing circuit and die temperature control circuit, in optical sender wavelength locking system of the present invention, the straight lens of described output wavelength change information collection circuit, polarized light separator, optical filter, wavelength detect light sensitive diode, the power detection light sensitive diode can directly adopt the optical power control circuit of this laser and the ready-made element of wavelength testing circuit; The temperature sensor of described variations in temperature Acquisition Circuit also can directly adopt the ready-made temperature sensor of die temperature control circuit.Do technical solution of the present invention to be directly applied to such laser like this, and saved resource.
Above-described specific embodiment, purpose of the present invention, technical scheme and beneficial effect are further described, institute it should be noted, the above only is specific embodiments of the invention, and those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of the technical scheme of claim record of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1, a kind of light transmitter output wavelength locking means is characterized in that comprising:
The change information of continuous collecting laser output wavelength, while continuous collecting laser tube core temperature information, both are carried out comprehensive calculation process, and the die temperature of laser is continued FEEDBACK CONTROL, thereby realize locking to light transmitter output wavelength according to the information after this processing.
2, light transmitter output wavelength locking means according to claim 1 is characterized in that:
Described the change information of laser output wavelength and the comprehensive calculation process of laser tube core temperature information are specially: the change information to described laser output wavelength carries out the computing processing and amplifying, and this result and described laser tube core temperature information is superimposed, then the comprehensive change information that obtains after the stack is carried out the computing processing and amplifying.
3, light transmitter output wavelength locking means according to claim 1 and 2 is characterized in that:
For the laser that carries the laser assembly that is used for die temperature control and output wavelength detection, the method of described collection output wavelength change information is: the electric current of the described sign luminous power information that is used for the laser assembly output that wavelength detects and the electric current that characterizes the luminous power information that contains wavelength information are converted into voltage by trans-impedance amplifier, carry out differential ratio then, obtain the change information of output wavelength.
4, a kind of light transmitter output wavelength locking system is characterized in that:
This system comprises output wavelength change information collection circuit, die temperature change information collection circuit, feedback signal generation unit and die temperature feedback control unit;
Described output wavelength change information collection circuit is used to gather the change information of laser output wavelength; Described variations in temperature Acquisition Circuit is used to gather the die temperature change information of laser; Described feedback signal generation unit is used for the output wavelength change information of described laser and described die temperature change information are handled, and produces a feedback signal; Described die temperature feedback control unit is used for according to described feedback signal the laser tube core temperature being adjusted, thereby realizes the output wavelength of optical sender is locked.
5, light transmitter output wavelength locking system according to claim 4 is characterized in that:
Described output wavelength change information collection circuit comprises: lens, light separator, optical filter, wavelength detect light sensitive diode, power detection light sensitive diode, trans-impedance amplifier and differential comparator; Wherein the laser that sends of laser is divided into two-way by light separator, one the tunnel through being input to wavelength detection light sensitive diode after the optical filter filtering, the output current of this wavelength detection light sensitive diode has promptly characterized the relative size of the luminous power that contains wavelength variation information, the direct input power in another road detects light sensitive diode, the output current of this power detection light sensitive diode has characterized the relative size of luminous power, after being converted to voltage by trans-impedance amplifier, the output current of this electric current and wavelength detection light sensitive diode is input in the differential comparator, this differential comparator carries out differential ratio to described two-way voltage, thereby draws described output wavelength change information;
For the laser that carries the laser assembly that is used for the wavelength detection, the device that described lens, light separator, optical filter, wavelength detection light sensitive diode, power detection light sensitive diode all adopt this laser to carry.
6, light transmitter output wavelength locking system according to claim 4 is characterized in that:
Described die temperature change information collection circuit comprises: temperature sensor and differential comparator; Described temperature sensor is used for the die temperature of laser is gathered, and described differential comparator is used for the output voltage of described temperature sensor and a reference voltage are carried out differential ratio, thereby exports described die temperature change information; Described reference voltage is corresponding with certain Wavelength grid of ITU-T definition.
For the laser that carries the laser assembly that is used for die temperature control, the temperature sensor that described temperature sensor adopts laser to carry.
7, light transmitter output wavelength locking system according to claim 4 is characterized in that:
Described die temperature feedback control unit comprises that semiconductor cooler and semiconductor cooler drive, and described semiconductor cooler is used for die temperature is regulated and control, and described semiconductor cooler drives and is used for described semiconductor cooler is carried out drive controlling.
8, according to each described light transmitter output wavelength locking system in the claim 4 to 7, it is characterized in that:
Described feedback signal generation unit comprises first operational amplification circuit, adder and second operational amplification circuit; Described second operational amplification circuit is used for the output signal of described output wavelength change information collection circuit is carried out the computing processing and amplifying; Described adder is used for the output signal of the output signal of described die temperature change information collection circuit and described second operational amplification circuit is superposeed; Described first operational amplification circuit is used for the output signal of described adder is carried out the computing processing and amplifying, and the output signal of this operational amplification circuit becomes the output signal of unit as described feedback letter bugle call.
9, light transmitter output wavelength locking system according to claim 8 is characterized in that:
Definite method of the circuit parameter of described first operational amplification circuit is: disconnect being electrically connected between described adder and described second operational amplification circuit, output at described first operational amplification circuit adds a driving voltage, watch the variation of the signal waveform of the described first operational amplification circuit input by oscilloscope, wherein rise time and the overshoot operational amplification circuit that is minimum signal waveform correspondence promptly is defined as final circuit;
Definite method of the circuit parameter of described second operational amplification circuit is: after having determined described first operational amplification circuit, connect the electrical connection of whole system, output at described first operational amplification circuit adds a driving voltage, the signal waveform of watching the described second operational amplification circuit input by oscilloscope changes, and wherein second operational amplification circuit of the signal waveform correspondence of rise time minimum promptly is defined as final circuit.
10, according to each described light transmitter output wavelength locking system in the claim 4 to 7, it is characterized in that:
Described feedback signal generation unit comprises: analog to digital converter, processor and digital to analog converter; The analog signal conversion that described analog to digital converter is used for this unit of input is a digital signal; Described processor is used for the digital signal of described analog to digital converter output is handled, and produces described feedback signal; Described digital to analog converter is used for the digital signal of described processor output is converted to analog signal.
Described processor comprises the first computing amplification module, adder and the second computing amplification module; The described second computing amplification module is used for described wavelength variation information is carried out the computing processing and amplifying; Described adder is used for the output signal of described die temperature change information and the described second computing amplification module is superposeed; The described first computing amplification module is used for the output signal of described adder is carried out the computing processing and amplifying, and the output signal of this computing amplification module is the output signal of this processor.
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| CNA2008101107104A CN101282179A (en) | 2008-05-27 | 2008-05-27 | Method and system for locking light transmitter output wavelength |
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| CNA2008101107104A CN101282179A (en) | 2008-05-27 | 2008-05-27 | Method and system for locking light transmitter output wavelength |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105762635A (en) * | 2016-04-20 | 2016-07-13 | 钱乐彬 | Wavelength control device for adjustable optical module, and method thereof |
| WO2018103004A1 (en) * | 2016-12-07 | 2018-06-14 | 华为技术有限公司 | Wavelength locking method and laser |
| CN109217097A (en) * | 2017-07-07 | 2019-01-15 | 中兴通讯股份有限公司 | laser wavelength control method and device |
| CN111865427A (en) * | 2020-07-20 | 2020-10-30 | 成都优博创通信技术有限公司 | Wavelength alignment method, device, transmitter and optical network system |
| CN112564802A (en) * | 2020-11-27 | 2021-03-26 | 武汉华工正源光子技术有限公司 | Dimmable module and full-temperature wave locking method thereof |
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2008
- 2008-05-27 CN CNA2008101107104A patent/CN101282179A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762635A (en) * | 2016-04-20 | 2016-07-13 | 钱乐彬 | Wavelength control device for adjustable optical module, and method thereof |
| CN105762635B (en) * | 2016-04-20 | 2018-11-23 | 深圳市极致兴通科技有限公司 | A kind of wavelength control apparatus and method of adjustable light module |
| WO2018103004A1 (en) * | 2016-12-07 | 2018-06-14 | 华为技术有限公司 | Wavelength locking method and laser |
| CN109792131A (en) * | 2016-12-07 | 2019-05-21 | 华为技术有限公司 | A kind of wavelength locking method and laser |
| CN109217097A (en) * | 2017-07-07 | 2019-01-15 | 中兴通讯股份有限公司 | laser wavelength control method and device |
| CN109217097B (en) * | 2017-07-07 | 2022-05-13 | 中兴通讯股份有限公司 | Laser wavelength control method and device |
| CN111865427A (en) * | 2020-07-20 | 2020-10-30 | 成都优博创通信技术有限公司 | Wavelength alignment method, device, transmitter and optical network system |
| CN112564802A (en) * | 2020-11-27 | 2021-03-26 | 武汉华工正源光子技术有限公司 | Dimmable module and full-temperature wave locking method thereof |
| CN112564802B (en) * | 2020-11-27 | 2021-10-26 | 武汉华工正源光子技术有限公司 | Dimmable module and full-temperature wave locking method thereof |
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