CN207265405U - A kind of laser driving circuit and laser - Google Patents
A kind of laser driving circuit and laser Download PDFInfo
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- CN207265405U CN207265405U CN201721060679.9U CN201721060679U CN207265405U CN 207265405 U CN207265405 U CN 207265405U CN 201721060679 U CN201721060679 U CN 201721060679U CN 207265405 U CN207265405 U CN 207265405U
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Abstract
The utility model embodiment discloses a kind of laser driving circuit and laser.The utility model embodiment circuit includes temperature control modules, PWM drive modules and TEC modules, PWM drive modules are connected respectively with the positive and negative anodes of TEC modules, PWM drive modules are connected with temperature control modules, temperature control modules are used to set the temperature adjusted, and adjust seed source laser temperature by PWM drive modules and TEC modules.Combined in the utility model embodiment by temperature control modules and PWM drive modules, substitute traditional MOPA laser TEC driving chips, reduced TEC driving prices, be conducive to seed source laser Technique Popularizing.
Description
Technical field
Field of laser device technology is the utility model is related to, more particularly to a kind of laser driving circuit and laser.
Background technology
MOPA (Master Oscillator Power-Amplifier) laser grew up in recent years, MOPA
The optical device that laser needs master control to coordinate has seed source laser, level-one pump laser, diode pumping laser.At present all
It is that directly three devices are driven.
It can be used in MOPA lasers and arrive seed source laser, since seed source laser needs at a constant temperature
Ability wavelength stabilization, at present seed source driving are substantially semiconductor cooler (the Thermo Electric using specialty
Cooler, TEC) driving chip is driven, such as MAX1978, or periphery PID (proportion-integral-
Derivative, proportional, integral-inverse) controller add pulse width modulation (Pulse Width Modulation, PWM) drive
Dynamic device.But specialty TEC driving chips are expensive at present, cause laser cost to remain high, are unfavorable for marketing.
Utility model content
The utility model embodiment provides a kind of laser driving circuit and laser, solves current MOPA lasers
The problem of TEC driving chips are expensive, and marketing is difficult.
In a first aspect, the application provides a kind of laser driving circuit, the laser driving circuit includes temperature control
Module, PWM drive modules and TEC modules, the PWM drive modules are connected respectively with the positive and negative anodes of the TEC modules, described
PWM drive modules are connected with the temperature control modules, and the temperature control modules are used to set the temperature adjusted, and pass through institute
State PWM drive modules and TEC modules adjust seed source laser temperature.
Further, the temperature control modules include proportional integration module and computing module, the proportional integration module
The computing module is connected, the computing module connects the PWM drive modules, and the proportional integration module includes being used to adopt
Collect the negative temperature coefficient thermo-sensitive resistor of seed source laser temperature；
The proportional integration module is used to calculate the difference between actual seed source laser temperature and set temperature value, so
It is adjusted afterwards with integration, is output to the computing module, the computing module is used for proportional integration module output
Signal is by scale operation to export suitable signal to the PWM drive modules.
Further, the computing module includes the first amplifier (U1A), the homophase input of first amplifier (U1A)
End connects one end of first resistor (R1) and one end of second resistance (R2), the other end connection of the first resistor (R1) respectively
The PWM drive modules, the inverting input of first amplifier (U1A) connect one end of the 5th resistance (R5), the 8th resistance
(R8) one end and one end of the 5th capacitance (C5), the one of the output terminal connection 3rd resistor (R3) of first amplifier (U1A)
The other end at end, the other end of the 8th resistance (R8) and the 5th capacitance (C5), the other end connection institute of the 3rd resistor (R3)
PWM drive modules, the first public termination power of first amplifier (U1A) and one end of the first capacitance (C1) are stated, it is described
The other end ground connection of first capacitance (C1), the other end of the 5th resistance (R5) connect one end of the 3rd capacitance (C3), the tenth
One end of one resistance (R11) and one end of the tenth resistance (R10), another termination power of the tenth resistance (R10)；It is described
The other end of second resistance (R2) connects the proportional integration module；
Second common port of first amplifier (U1A), the other end, the 11st resistance of the 3rd capacitance (C3)
(R11) other end ground connection.
Further, the proportional integration module further includes the second amplifier (U1B), the second resistance (R2) it is another
End connects the output terminal of second amplifier (U1B) and one end of the 4th capacitance (C4), second amplifier (U1B) it is same mutually defeated
Enter one end of the 6th resistance (R6) of end connection, the inverting input of second amplifier (U1B) connects the one of the 7th resistance (R7)
End and one end of the 9th resistance (R9), the other end of the 9th resistance (R9) connect the other end of the 4th capacitance (C4),
The other end of 6th resistance (R6) connects one end of the second capacitance (C2), one end of the 4th resistance (R4) and the subzero temperature
One end of coefficient thermo-sensitive resistor (NTC) is spent, the 7th resistance (R7) connects one end and the adjustable resistance of the 6th capacitance (C6)
(RP1) adjustment end, the first fixing end of the adjustable resistance (RP1) connects one end of the 13rd resistance (R13), described adjustable
Second fixing end of resistance (RP1) connects one end of the 12nd resistance (R12)；
The other end of 4th resistance (R4), another termination supply voltage of the 12nd resistance (R12)；
The other end of second capacitance (C2), the other end of the negative temperature coefficient thermo-sensitive resistor (NTC) and described
The other end of six capacitances (C6) and the other end of the 13rd resistance (R13) ground connection.
Further, the PWM drive modules include：
Signal output module, for output pwm signal；
Rectification module, respectively the positive and negative anodes with the signal output module, the TEC modules be connected, for by the letter
The pwm signal of number output module output is adjusted to stable direct current signal to drive TEC modules；
Filter module, one end connection supply voltage, other end ground connection, makes the signal output module obtain surely for filtering
Fixed power supply.
Further, the signal output module includes the 3rd amplifier (U2), the 12nd capacitance (C12), the 14th capacitance
(C14), one end of the 16th capacitance (C16) and the 17th capacitance (C17),
The 3rd pin, the 4th pin of 3rd amplifier (U2) connect the proportional integration module, the 3rd amplifier
(U2) the 4th pin connects one end of the 12nd capacitance (C12), the 5th pin, the 6th pin of the 3rd amplifier (U2)
The other end of second capacitance (C12) is connected respectively, and the 7th pin of the 3rd amplifier (U2) connects the 14th capacitance (C14)
One end, the other end of the 14th capacitance (C14) connects the 6th pin of the 3rd amplifier (U2), the 3rd amplifier (U2)
The 8th pin connect the 16th capacitance (C16) one end and the 17th capacitance (C17) one end.
Further, the rectification module includes the 11st capacitance (C11), the first inductance (L1), the 13rd capacitance
(C13), the second inductance (L2), the 7th capacitance (C7), the tenth capacitance (C10) and the 15th capacitance (C15)；
Tenth pin of the 3rd amplifier (U2) connects one end and the second inductance (L2) of the 13rd capacitance (C13)
One end, the other end of second inductance (L2) connect one end and the TEC modules of the 15th capacitance (C15), the 3rd amplifier
(U2) the 11st pin connects the other end of the 13rd capacitance (C13), the 13rd pin of the 3rd amplifier (U2)
One end of the 7th capacitance (C7) is connected, the 14th pin of the 3rd amplifier (U2) connects the 11st capacitance (C11)
One end, the 15th pin of the 3rd amplifier (U2) connect the other end and the first inductance of the 11st capacitance (C11)
(L1) one end, the other end connection TEC modules of first inductance (L1) and one end of the tenth capacitance (C10)；
The first pin, second pin, the 8th pin and the 13rd pin of 3rd amplifier (U2) connect supply voltage；
5th pin of the 3rd amplifier (U2), the 6th pin, the 7th pin, the 9th pin, the 12nd pin, the tenth
Six pins, one end of the 7th capacitance (C7), the other end of second capacitance (C12), the 16th capacitance (C16)
The other end, the other end of the 17th capacitance (C17), the other end, the tenth capacitance of the 15th capacitance (C15)
(C10) other end ground connection.
Further, the filter circuit includes the 8th capacitance (C8) and the 9th capacitance (C9), the 8th capacitance (C8)
In parallel with the 9th capacitance (C9), the 8th capacitance (C8) connects supply voltage with one end of the 9th capacitance (C9),
The other end is grounded, and the capacitance of the 8th capacitance (C8) is more than the capacitance of the 9th capacitance (C9).
Further, the 3rd amplifier (U2) is D class amplifiers.
Second aspect, the utility model also provide a kind of laser, and the laser is included such as any institute in first aspect
The laser driving circuit stated.
As can be seen from the above technical solutions, the utility model embodiment has the following advantages：
Laser driving circuit includes temperature control modules, PWM drive modules and TEC moulds in the utility model embodiment
Block, PWM drive modules are connected respectively with the positive and negative anodes of TEC modules, and PWM drive modules are connected with temperature control modules, temperature control
Molding block is used to set the temperature adjusted, and adjusts seed source laser temperature by PWM drive modules and TEC modules.This reality
Combined with laser driving circuit in new embodiment by temperature control modules and PWM drive modules, substitute traditional MOPA
Laser TEC driving chips, reduce TEC drive circuit prices, are conducive to seed source laser Technique Popularizing.
Brief description of the drawings
Fig. 1 is one embodiment schematic diagram of laser driving circuit in the utility model embodiment；
Fig. 2 is one embodiment signal of temperature control modules in laser driving circuit in the utility model embodiment
Figure；
Fig. 3 is that one embodiment circuit of temperature control modules in laser driving circuit in the utility model embodiment shows
It is intended to；
Fig. 4 is one embodiment schematic diagram of PWM drive modules in laser driving circuit in the utility model embodiment.
Embodiment
It is real below in conjunction with the utility model in order to make those skilled in the art more fully understand the utility model
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's all other embodiments obtained without making creative work, all should
When the scope for belonging to the utility model protection.
Term " first ", " second " in the specification and claims of the utility model and above-mentioned attached drawing etc. (if
In the presence of) it is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so that the embodiments described herein can be with except illustrating or describing herein
Order beyond appearance is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that covering is non-exclusive
Include, for example, containing the process of series of steps or unit, system, product or equipment is not necessarily limited to what is clearly listed
Those steps or unit, but may include not list clearly or for intrinsic other of these processes, product or equipment
Step or unit.
As shown in Figure 1, Figure 2, laser driving circuit one embodiment includes temperature control in the utility model embodiment
Module, PWM drive modules and TEC modules, the PWM drive modules are connected respectively with the positive and negative anodes of the TEC modules, described
PWM drive modules are connected with the temperature control modules, and the temperature control modules are used to set the temperature adjusted, and pass through institute
State PWM drive modules and TEC modules adjust seed source laser temperature.
Laser driving circuit includes temperature control modules, PWM drive modules and TEC moulds in the utility model embodiment
Block, PWM drive modules are connected respectively with the positive and negative anodes of TEC modules, and PWM drive modules are connected with temperature control modules, temperature control
Molding block is used to set the temperature adjusted, and adjusts seed source laser temperature by PWM drive modules and TEC modules.This reality
Combined with laser driving circuit in new embodiment by temperature control modules and PWM drive modules, substitute traditional MOPA
Laser TEC driving chips, reduce TEC drive circuit prices, are conducive to seed source laser Technique Popularizing.
Further, as shown in Fig. 2, the temperature control modules include proportional integration module and computing module, the ratio
Example integration module connects the computing module, and the computing module connects the PWM drive modules, in the proportional integration module
Including the negative temperature coefficient thermo-sensitive resistor for gathering seed source laser temperature；
The proportional integration module is used to calculate the difference between actual seed source laser temperature and set temperature value, so
It is adjusted afterwards with integration, is output to the computing module, the computing module is used for proportional integration module output
Signal is by scale operation to export suitable signal to the PWM drive modules.
Further, as shown in figure 3, the computing module includes the first amplifier U1A, the first amplifier U1A's is same
Phase input terminal connects one end of first resistor R1 and one end of second resistance R2, the other end connection of the first resistor R1 respectively
The PWM drive modules, the inverting input of the first amplifier U1A connect one end of the 5th resistance R5, the 8th resistance R8
One end and one end of the 5th capacitance C5, one end of the output terminal connection 3rd resistor R3 of the first amplifier U1A, the 8th resistance R8
The other end and the 5th capacitance C5 the other end, the other end of the 3rd resistor R3 connects the PWM drive modules, described the
The first public termination power of one amplifier U1A and one end of the first capacitance C1, the other end ground connection of the first capacitance C1,
The other end of the 5th resistance R5 connects one end of the 3rd capacitance C3, one end of the 11st resistance R11 and the tenth resistance R10's
One end, another termination power of the tenth resistance R10；The other end of the second resistance R2 connects the proportional integration mould
Block.
The second common port of the first amplifier U1A, the other end, the 11st resistance R11 of the 3rd capacitance C3
The other end ground connection.
Further, as shown in figure 3, the proportional integration module further includes the second amplifier U1B, the second resistance R2's
The other end connects the output terminal of the second amplifier U1B and one end of the 4th capacitance C4, the homophase input of the second amplifier U1B
One end of the 6th resistance R6 of end connection, the inverting input of the second amplifier U1B connect one end and the 9th of the 7th resistance R7
One end of resistance R9, the other end of the 9th resistance R9 connect the other end of the 4th capacitance C4, the 6th resistance R6
The other end connect the one of one end of the second capacitance C2, one end of the 4th resistance R4 and the negative temperature coefficient thermo-sensitive resistor NTC
End, one end of the 6th capacitance C6 of the 7th resistance R7 connections and the adjustment end of adjustable resistance RP1, the adjustable resistance RP1's
First fixing end connects one end of the 13rd resistance R13, and the second fixing end of the adjustable resistance RP1 connects the 12nd resistance
One end of R12.
The other end of the 4th resistance R4, another termination supply voltage of the 12nd resistance R12.
The other end of the second capacitance C2, the other end of the negative temperature coefficient thermo-sensitive resistor NTC and the 6th electricity
Hold the other end of C6 and the other end ground connection of the 13rd resistance R13.
Further, as shown in figure 4, the PWM drive modules include：
Signal output module, for output pwm signal；
Rectification module, respectively the positive and negative anodes with the signal output module, the TEC modules be connected, for by the letter
The pwm signal of number output module output is adjusted to stable direct current signal to drive TEC modules.
Filter module, one end connection supply voltage, other end ground connection, makes the signal output module obtain surely for filtering
Fixed power supply.
Further, as shown in figure 4, the signal output module include the 3rd amplifier U2, the 12nd capacitance C12,
14th capacitance C14, one end of the 16th capacitance C16 and the 17th capacitance C17, the 3rd pin of the 3rd amplifier U2,
Four pins connect the proportional integration module, and the 4th pin of the 3rd amplifier U2 connects one end of the 12nd capacitance C12,
The 5th pin, the 6th pin of the 3rd amplifier U2 connects the other end of the second capacitance C12 respectively, the 3rd amplifier U2's
7th pin connects one end of the 14th capacitance C14, and the other end of the 14th capacitance C14 connects the 6th of the 3rd amplifier U2 the
Pin, the 8th pin of the 3rd amplifier U2 connect one end of the 16th capacitance C16 and one end of the 17th capacitance C17.
Further, the rectification module includes the 11st capacitance C11, the first inductance L1, the 13rd capacitance C13, second
Inductance L2, the 7th capacitance C7, the tenth capacitance C10 and the 15th capacitance C15.
The tenth pin of the 3rd amplifier U2 connects one end of the 13rd capacitance C13 and one end of the second inductance L2, institute
The other end for stating the second inductance L2 connects one end and the TEC modules of the 15th capacitance C15, and the 11st of the 3rd amplifier U2 draws
Foot connects the other end of the 13rd capacitance C13, and the 13rd pin of the 3rd amplifier U2 connects the 7th capacitance C7
One end, the 14th pin of the 3rd amplifier U2 connects one end of the 11st capacitance C11, the tenth of the 3rd amplifier U2 the
Five pins connect the other end of the 11st capacitance C11 and one end of the first inductance L1, the other end of the first inductance L1
Connect TEC modules and one end of the tenth capacitance C10.
The first pin, second pin, the 8th pin and the 13rd pin of the 3rd amplifier U2 connects supply voltage.
The 5th pin of the 3rd amplifier U2, the 6th pin, the 7th pin, the 9th pin, the 12nd pin, the 16th
Pin, one end of the 7th capacitance C7, the other end of the second capacitance C12, the 16th capacitance C16 the other end,
The other end of the 17th capacitance C17, the other end, the other end of the tenth capacitance C10 of the 15th capacitance C15
Ground connection.
Further, as shown in figure 4, the filter circuit includes the 8th capacitance C8 and the 9th capacitance C9, the 8th electricity
It is in parallel to hold C8 and the 9th capacitance C9, the 8th capacitance C8 connects supply voltage with one end of the 9th capacitance C9, separately
One end is grounded, and the capacitance of the 8th capacitance C8 is more than the capacitance of the 9th capacitance C9.
Laser driving circuit in the utility model embodiment is described with reference to principle：
Laser driving circuit is made of two modules in the utility model embodiment, PWM drive modules and temperature control
Module, in the utility model embodiment by gather 10K negative temperature coefficients thermo-sensitive resistor (10K NTC) that seed source carries come
Know the temperature of seed source laser.The high-precision adjustable electric encapsulated in the utility model embodiment by adjusting the 3224W of 10K
RP1 is hindered to set the temperature for needing to adjust, and then the semiconductor cooler (TEC) for driving seed source to carry.
Constituted in the amplifier LMC6482, U1B and external devices that temperature control circuit module chips U1B is general low price
Proportional integration module.Difference between actual seed source laser temperature and set temperature value, Ran Houyong are obtained by the circuit
Integration is slowly adjusted.The signal that U1B is exported is given to PWM drive modules by U1A chips by addition, subtraction, scale operation
Suitable signal is provided.
It is general audio D class amplifiers in PWM drive module chips PAM8320, the frequency of the 286KHZ of amplifier output
The bridge circuit of rate signal and output interface also integrates the characteristics of meeting pwm driver, when signal "+IN " is different value,
OUTN and OUTP will export the frequency signal of different duty, and pwm signal is being adjusted to stable direct current by lc circuit
Signal drives TEC modules.
The utility model also provides a kind of laser, and the laser includes the laser driving electricity as described in any of the above-described
Road.
In several embodiments provided herein, it should be understood that disclosed system, device can be by other
Mode realize.For example, device embodiment described above is only schematical, for example, the division of the unit, only
For a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine
Or another system is desirably integrated into, or some features can be ignored, or do not perform.Another, shown or discussed phase
Coupling, direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit
Connection, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
The above, above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, it will be understood by those of ordinary skill in the art that：It is still
It can modify to the technical solution described in foregoing embodiments, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technical solution
Spirit and scope.
Claims (10)
1. a kind of laser driving circuit, it is characterised in that the laser driving circuit includes temperature control modules, PWM drives
Dynamic model block and TEC modules, the PWM drive modules are connected respectively with the positive and negative anodes of the TEC modules, the PWM drive modules
It is connected with the temperature control modules, the temperature control modules are used to set the temperature adjusted, and drive mould by the PWM
Block and TEC modules adjust seed source laser temperature.
2. laser driving circuit according to claim 1, it is characterised in that the temperature control modules are accumulated including ratio
Sub-module and computing module, the proportional integration module connect the computing module, and the computing module connects the PWM drivings
Module, the proportional integration module include being used for the negative temperature coefficient thermo-sensitive resistor for gathering seed source laser temperature；
The proportional integration module is used to calculate the difference between actual seed source laser temperature and set temperature value, Ran Houyong
Integration is adjusted, and is output to the computing module, and the computing module is used for the signal for exporting the proportional integration module
By scale operation to export suitable signal to the PWM drive modules.
3. laser driving circuit according to claim 2, it is characterised in that the computing module includes the first amplifier
(U1A), the in-phase input end of first amplifier (U1A) connects one end and the second resistance (R2) of first resistor (R1) respectively
One end, the other end of the first resistor (R1) connect the PWM drive modules, the anti-phase input of first amplifier (U1A)
One end, one end of the 8th resistance (R8) and one end of the 5th capacitance (C5) of the 5th resistance (R5) of end connection, first amplifier
(U1A) output terminal connects the another of one end of 3rd resistor (R3), the other end of the 8th resistance (R8) and the 5th capacitance (C5)
End, the other end of the 3rd resistor (R3) connect the PWM drive modules, the first common port of first amplifier (U1A)
One end of power supply and the first capacitance (C1) is connect, the other end of first capacitance (C1) is grounded, the 5th resistance (R5)
The other end connects one end, one end of the 11st resistance (R11) and one end of the tenth resistance (R10) of the 3rd capacitance (C3), described
Another termination power of tenth resistance (R10)；The other end of the second resistance (R2) connects the proportional integration module；
Second common port of first amplifier (U1A), the other end, the 11st resistance of the 3rd capacitance (C3)
(R11) other end ground connection.
4. laser driving circuit according to claim 3, it is characterised in that the proportional integration module further includes second
Amplifier (U1B), the other end of the second resistance (R2) connect the output terminal and the 4th capacitance (C4) of second amplifier (U1B)
One end, the in-phase input end of second amplifier (U1B) connects one end of the 6th resistance (R6), second amplifier (U1B)
Inverting input connect the 7th resistance (R7) one end and the 9th resistance (R9) one end, the 9th resistance (R9) it is another
End connects the other end of the 4th capacitance (C4), and the other end of the 6th resistance (R6) connects the one of the second capacitance (C2)
The one end at end, one end of the 4th resistance (R4) and the negative temperature coefficient thermo-sensitive resistor (NTC), the 7th resistance (R7) connection
One end of 6th capacitance (C6) and the adjustment end of adjustable resistance (RP1), the first fixing end connection the of the adjustable resistance (RP1)
One end of 13 resistance (R13), the second fixing end of the adjustable resistance (RP1) connect one end of the 12nd resistance (R12)；
The other end of 4th resistance (R4), another termination supply voltage of the 12nd resistance (R12)；
The other end of second capacitance (C2), the other end of the negative temperature coefficient thermo-sensitive resistor (NTC) and the 6th electricity
Hold the other end of (C6) and the other end ground connection of the 13rd resistance (R13).
5. laser driving circuit according to claim 2, it is characterised in that the PWM drive modules include：
Signal output module, for output pwm signal；
Rectification module, respectively the positive and negative anodes with the signal output module, the TEC modules be connected, for the signal is defeated
The pwm signal for going out module output is adjusted to stable direct current signal to drive TEC modules；
Filter module, one end connection supply voltage, other end ground connection, makes the signal output module obtain stabilization for filtering
Power supply.
6. laser driving circuit according to claim 5, it is characterised in that the signal output module includes the 3rd fortune
Put (U2), the 12nd capacitance (C12), the 14th capacitance (C14), one end of the 16th capacitance (C16) and the 17th capacitance
(C17), the 3rd pin of the 3rd amplifier (U2), the 4th pin connect the proportional integration module, the 3rd amplifier
(U2) the 4th pin connects one end of the 12nd capacitance (C12), the 5th pin, the 6th pin point of the 3rd amplifier (U2)
The other end of the 12nd capacitance (C12) is not connected, and the 7th pin of the 3rd amplifier (U2) connects the 14th capacitance (C14)
One end, the other end of the 14th capacitance (C14) connect the 6th pin of the 3rd amplifier (U2), the 3rd amplifier (U2)
8th pin connects one end of the 16th capacitance (C16) and one end of the 17th capacitance (C17).
7. laser driving circuit according to claim 6, it is characterised in that the rectification module includes the 11st capacitance
(C11), the first inductance (L1), the 13rd capacitance (C13), the second inductance (L2), the 7th capacitance (C7), the tenth capacitance (C10) and
15th capacitance (C15)；
Tenth pin of the 3rd amplifier (U2) connects one end of the 13rd capacitance (C13) and one end of the second inductance (L2),
The other end of second inductance (L2) connects one end and the TEC modules of the 15th capacitance (C15), the 3rd amplifier (U2)
11st pin connects the other end of the 13rd capacitance (C13), the 13rd pin connection institute of the 3rd amplifier (U2)
One end of the 7th capacitance (C7) is stated, the 14th pin of the 3rd amplifier (U2) connects one end of the 11st capacitance (C11), institute
State the 3rd amplifier (U2) the 15th pin connect the 11st capacitance (C11) the other end and the first inductance (L1) one
End, the other end connection TEC modules of first inductance (L1) and one end of the tenth capacitance (C10)；
The first pin, second pin, the 8th pin and the 13rd pin of 3rd amplifier (U2) connect supply voltage；
5th pin of the 3rd amplifier (U2), the 6th pin, the 7th pin, the 9th pin, the 12nd pin, the 16th are drawn
Foot, one end of the 7th capacitance (C7), the other end of the 12nd capacitance (C12), the 16th capacitance (C16) it is another
One end, the other end of the 17th capacitance (C17), the other end, the tenth capacitance of the 15th capacitance (C15)
(C10) other end ground connection.
8. laser driving circuit according to claim 7, it is characterised in that the filter module includes the 8th capacitance
(C8) and the 9th capacitance (C9), the 8th capacitance (C8) and the 9th capacitance (C9) are in parallel, the 8th capacitance (C8) and
One end connection supply voltage of 9th capacitance (C9), other end ground connection, the capacitance of the 8th capacitance (C8) are more than institute
State the capacitance of the 9th capacitance (C9).
9. according to any laser driving circuit in claim 6 to 7, it is characterised in that
3rd amplifier (U2) is D class amplifiers.
10. a kind of laser, it is characterised in that the laser that the laser is included as described in any in claim 1 to 9 drives
Dynamic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721060679.9U CN207265405U (en) | 2017-08-23 | 2017-08-23 | A kind of laser driving circuit and laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721060679.9U CN207265405U (en) | 2017-08-23 | 2017-08-23 | A kind of laser driving circuit and laser |
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| CN207265405U true CN207265405U (en) | 2018-04-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425402A (en) * | 2017-08-23 | 2017-12-01 | 深圳市杰普特光电股份有限公司 | A kind of laser driving circuit and laser |
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2017
- 2017-08-23 CN CN201721060679.9U patent/CN207265405U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425402A (en) * | 2017-08-23 | 2017-12-01 | 深圳市杰普特光电股份有限公司 | A kind of laser driving circuit and laser |
| CN107425402B (en) * | 2017-08-23 | 2024-01-02 | 深圳市杰普特光电股份有限公司 | Laser driving circuit and laser |
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