CN1322659C - Low-power semiconductor laser driving power supply - Google Patents
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Abstract
一种低功率半导体激光器驱动电源，它由输入降噪整流滤波电路(U1)、脉冲宽度调制器(U2)、高精度基准电压电路(U3)和电流放大及稳流输出电路(U4)四部分组成，该电源可以向低功率半导体激光器泵浦源激光二极管(LD)连续输出稳定、可靠、抗干扰能力强的电流。当电源开启时，可使输出电流缓慢的上升到激光二极管工作电流，避免了因电源突然开启产生过大的正电流梯度而损坏激光二极管。当电源关闭或外部突然停电时，仍可持续对激光二极管供电，使电流缓慢下降到零，避免了因电源突然掉电产生过大的负电流梯度而损坏激光二极管。且可以方便的实现外信号控制。输出电流稳定可调，可根据需要在0～2A之间连续调节，其纹波小于2%。
A low-power semiconductor laser driving power supply, which consists of an input noise reduction rectification filter circuit (U1), a pulse width modulator (U2), a high-precision reference voltage circuit (U3) and a current amplification and current stabilization output circuit (U4). The power supply can continuously output a stable, reliable and highly anti-interference current to a low-power semiconductor laser pump source laser diode (LD). When the power supply is turned on, the output current can slowly rise to the laser diode working current, avoiding the damage to the laser diode caused by the excessive positive current gradient generated by the sudden power on. When the power supply is turned off or the external power is suddenly cut off, the laser diode can still be continuously powered, so that the current slowly drops to zero, avoiding the damage to the laser diode caused by the excessive negative current gradient generated by the sudden power off. And external signal control can be conveniently realized. The output current is stable and adjustable, and can be continuously adjusted between 0 and 2A as needed, and its ripple is less than 2%.
Description
技术领域technical field
本发明涉及半导体激光器驱动电源，特别世一种低功率半导体激光器驱动电源，它是一种用于低功率半导体激光器泵浦激光二极管的恒流源。The invention relates to a driving power supply for a semiconductor laser, in particular to a driving power supply for a low-power semiconductor laser, which is a constant current source for pumping a laser diode for a low-power semiconductor laser.
背景技术Background technique
半导体激光器是一种电致发光器件，输出光功率低于300mW的低功率半导体激光器在景观工程和光通讯等领域中有着广泛的应用。当稳定的电流输入半导体激光器泵浦激光二极管时，它会发出一定波长的激光。输出的激光会因驱动电源输入电流不稳定而导致其输出波长不稳定，尤其是当电源突然开启或突然关闭时，因电流突变使得半导体激光器泵浦激光二极管上承受很大的正向或反向电流冲击，甚至造成半导体激光器的损坏。通常半导体激光器不稳定甚至损坏的原因主要来自电源驱动系统，所以半导体激光器要求输入的电流稳定、可靠、抗干扰能力强、连续可调，还要求当电源突然开启或突然关闭时，能避免半导体激光器因驱动电流突变而损坏。现有的半导体激光器，部分解决了系统的干扰问题，但对因驱动电流突变而造成的半导体激光器损坏，还没有很好的解决方案。Semiconductor laser is a kind of electroluminescent device, and the low-power semiconductor laser with output light power lower than 300mW has a wide range of applications in the fields of landscape engineering and optical communication. When a stable current is input to the semiconductor laser to pump the laser diode, it will emit laser light with a certain wavelength. The output laser will be unstable due to the unstable input current of the driving power supply, especially when the power supply is turned on or off suddenly, the semiconductor laser pumping laser diode will bear a large forward or reverse direction due to the sudden change of current. The impact of current may even cause damage to the semiconductor laser. Usually, the cause of semiconductor laser instability or even damage is mainly from the power drive system, so the semiconductor laser requires stable, reliable, strong anti-interference ability, and continuously adjustable input current. Damaged by sudden changes in drive current. The existing semiconductor lasers partially solve the system interference problem, but there is no good solution to the damage of the semiconductor laser caused by the sudden change of the driving current.
发明内容Contents of the invention
本发明的目的是，提供一种用于低功率半导体激光器的驱动电源。该驱动电源可向低功率半导体激光器提供稳定、可靠、抗干扰强的电流，当电源突然开启或突然关闭时，可使输入激光器的驱动电流缓慢上升或缓慢下降，避免因电流突变而产生过大的电流冲击而导致激光器损坏，并且可方便的实现外信号控制。输出电流连续可调，可根据需要调节使输出电流为0～2A之间的任意值，电流纹波小于2％。The object of the present invention is to provide a driving power supply for a low-power semiconductor laser. The drive power supply can provide stable, reliable, and strong anti-interference current to low-power semiconductor lasers. When the power supply is turned on or off suddenly, the drive current input to the laser can be slowly increased or decreased to avoid excessive currents due to sudden changes in current. The laser is damaged due to the current shock, and the external signal control can be realized conveniently. The output current is continuously adjustable, and can be adjusted according to the needs so that the output current can be any value between 0 and 2A, and the current ripple is less than 2%.
为实现上述目的，本发明采用如下技术方案：To achieve the above object, the present invention adopts the following technical solutions:
一种低功率半导体激光器驱动电源，其特征在于它由输入降噪整流滤波电路、脉冲宽度调制器、高精度基准电压电路和电流放大与稳流电路四部分组成，其连接关系如下：输入降噪整流滤波电路的正极输出端连接隔离变压器初级的一端，该隔离变压器初级的另一端连接高速开关型晶体管集电极，高速开关型晶体管发射极连接所述的降噪整流滤波电路的接地端，隔离变压器次级的一端连接整流管的正极，该整流管的负极连接电感的一端和第一滤波电容正极的节点，该电感的另一端连接第二滤波电容的正极端，所述的电感与第二滤波电容正极相连的节点连接第一可变电阻的一端，所述的隔离变压器的次级的另一端连接第一滤波电容、第二滤波电容负极和第一可变电阻的另一端，第一可变电阻的滑动端连接电流放大与稳流电路的正极输入端，电流放大与稳流电路的负极输入端连接所述的隔离变压器、第一滤波电容、第二滤波电容的负极和第一可变电阻相连的节点，电流放大与稳流电路的输出端分别连接激光二极管的两端，所述的脉冲宽度调制器两输入端分别连接第一可变电阻的两端，所述的高精度基准电压电路的输出端连接所述的脉冲宽度调制器参考电压输入端，所述的脉冲宽度调制器输出端连接高速开关型晶体管基极。A low-power semiconductor laser drive power supply is characterized in that it consists of four parts: an input noise reduction rectification filter circuit, a pulse width modulator, a high-precision reference voltage circuit, and a current amplification and current stabilization circuit. The connection relationship is as follows: input noise reduction The positive output end of the rectification filter circuit is connected to one end of the primary end of the isolation transformer, the other end of the primary end of the isolation transformer is connected to the collector of the high-speed switching transistor, and the emitter of the high-speed switching transistor is connected to the ground end of the noise reduction rectification filter circuit, the isolation transformer One end of the secondary is connected to the positive pole of the rectifier tube, the negative pole of the rectifier tube is connected to the node of one end of the inductor and the positive pole of the first filter capacitor, and the other end of the inductor is connected to the positive terminal of the second filter capacitor, the inductor and the second filter capacitor The node connected to the positive electrode of the capacitor is connected to one end of the first variable resistor, and the other end of the secondary side of the isolation transformer is connected to the first filter capacitor, the negative electrode of the second filter capacitor and the other end of the first variable resistor, and the first variable resistor The sliding end of the resistor is connected to the positive input terminal of the current amplification and current stabilization circuit, and the negative input terminal of the current amplification and current stabilization circuit is connected to the isolation transformer, the first filter capacitor, the negative electrode of the second filter capacitor and the first variable resistor connected nodes, the output ends of the current amplification and current stabilization circuit are respectively connected to the two ends of the laser diode, the two input ends of the pulse width modulator are respectively connected to the two ends of the first variable resistor, and the high-precision reference voltage circuit The output end of the pulse width modulator is connected to the reference voltage input end of the pulse width modulator, and the output end of the pulse width modulator is connected to the base of the high-speed switching transistor.
所述的电流放大与稳流电路的构成是：第二可变电阻一端连接电流放大与稳流电路正极性输入端，第二可变电阻的另一端连接电流放大与稳流电路负极性输入端，第二可变电阻滑动端连接第二比较器的正极性输入端，该第二比较器正极性输入端连接第三电容一端，该第三电容另一端连接电流放大与稳流电路负级性输入端，第三可变电阻一端连接电流放大与稳流电路正极性输入端，第三可变电阻的另一端连接电流放大与稳流电路负极性输入端，第三可变电阻滑动端连接第一比较器正极性输入端，第二电阻和第四电容并联后跨接在第二比较器负级性输入端和输出端之间，输出端经第四电阻连接电流放大器基极，电流放大器基极还连接第一比较器的输出端和第五电容的正极，第五电容负极连接电流放大与稳流电路负级性输入端，电流放大器T的发射极经第五电阻连接电流放大与稳流电路负级性输入端，电流放大器的发射极还连接第二比较器的负极性输入端和第一电阻的一端，该第一电阻的另一端连接第一比较器的负极性输入端，电流放大器的集电极连接激光二极管的负极，激光二极管正极连接电流放大与稳流电路正极性输入端，而且第六电容和第二二极管并联后跨接在该激光二极管两端，且第二二极管的极性和激光二极管的极性相反，开关管的漏极连接激光二极管的正极，开关管的衬垫和源极相连并连接电流放大器的发射级，第三电阻和第一二极管并联后跨接在开关管的栅极和源极之间，第一二极管负极接开关管的栅极，正极接开关管的源极，第三电阻两端引出外控制性信号的输入端。The composition of the current amplification and current stabilization circuit is as follows: one end of the second variable resistor is connected to the positive input terminal of the current amplification and current stabilization circuit, and the other end of the second variable resistor is connected to the negative polarity input terminal of the current amplification and current stabilization circuit. , the sliding end of the second variable resistor is connected to the positive input end of the second comparator, the positive input end of the second comparator is connected to one end of the third capacitor, and the other end of the third capacitor is connected to the negative polarity of the current amplification and current stabilization circuit Input end, one end of the third variable resistor is connected to the positive input end of the current amplification and current stabilization circuit, the other end of the third variable resistance is connected to the negative polarity input end of the current amplification and current stabilization circuit, and the sliding end of the third variable resistance is connected to the first A comparator positive input terminal, the second resistor and the fourth capacitor are connected in parallel between the negative input terminal and the output terminal of the second comparator, the output terminal is connected to the base of the current amplifier through the fourth resistor, and the base of the current amplifier pole is also connected to the output terminal of the first comparator and the positive pole of the fifth capacitor, the negative pole of the fifth capacitor is connected to the negative input terminal of the current amplification and current stabilization circuit, and the emitter of the current amplifier T is connected to the current amplification and current stabilization circuit through the fifth resistor The negative input terminal of the circuit, the emitter of the current amplifier is also connected to the negative input terminal of the second comparator and one end of the first resistor, and the other end of the first resistor is connected to the negative input terminal of the first comparator, and the current amplifier The collector of the laser diode is connected to the negative pole of the laser diode, the positive pole of the laser diode is connected to the positive input terminal of the current amplification and current stabilization circuit, and the sixth capacitor and the second diode are connected in parallel and connected across the two ends of the laser diode, and the second diode The polarity of the tube is opposite to that of the laser diode, the drain of the switch tube is connected to the anode of the laser diode, the pad of the switch tube is connected to the source and is connected to the emitter stage of the current amplifier, and the third resistor is connected in parallel with the first diode Afterwards, it is connected between the grid and the source of the switch tube, the cathode of the first diode is connected to the grid of the switch tube, the anode is connected to the source of the switch tube, and the input terminal of the external control signal is drawn from both ends of the third resistor.
本发明与现有相关技术相比的优点在于：可以连续向采用激光二极管泵浦的低功率半导体激光器输出稳定、可靠、抗干扰能力强的电流，由电阻R4、R5、电容C5和放大管T组成的电路可以使电源突然开启时输出电流缓慢上升，电源突然关闭时输出电流缓慢下降，避免激光二极管LD因电流突变而损坏。由开关管M、电阻R3和二极管D2组成的电路可以方便的实现外信号对激光器的控制。Compared with the existing related technology, the present invention has the advantages that it can continuously output stable, reliable, and strong anti-interference current to the low-power semiconductor laser pumped by laser diodes. The composed circuit can make the output current rise slowly when the power supply is suddenly turned on, and the output current slowly decrease when the power supply is suddenly turned off, so as to avoid damage to the laser diode LD due to a sudden change in current. The circuit composed of the switch tube M, the resistor R3 and the diode D2 can conveniently realize the control of the laser by the external signal.
附图说明Description of drawings
图1为本发明低功率半导体激光器驱动电源电路结构示意图Fig. 1 is a schematic structural diagram of a low-power semiconductor laser drive power supply circuit of the present invention
图2为本发明电流放大及稳流输出电路示意图Fig. 2 is a schematic diagram of current amplification and steady current output circuit of the present invention
具体实施方式Detailed ways
以下结合附图对本发明作详细说明，但不应以此限制本发明的保护范围。The present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereto.
先请参阅图1，图1为本发明低功率半导体激光器驱动电源电路结构示意图，由图可见，本发明低功率半导体激光器驱动电源由四部分组成，即输入降噪整流滤波电路U1；脉冲宽度调制器U2；高精度基准电压电路U3；电流放大及稳流输出电路U4。输入降噪整流滤波电路U1正极性输出端连接隔离变压器TF初级的一端，隔离变压器TF初级另一端连接高速开关型晶体管BJT集电极，该高速开关型晶体管BJT的发射级连接U1另一端。隔离变压器TF次级的一端连接整流管D的正级，整流管D的负级连接电感L和滤波电容C1正极的节点，电感L的另一端连接滤波电容C2的正极端。电感L与电容C2正极的节点连接第一可变电阻VR一端。隔离变压器TF次级的另一端连接滤波电容C1、C2负级和第一可变电阻VR另一端，第一可变电阻VR的滑动端连接电流放大与稳流输出电路U4的正极输入端，电流放大与稳流输出电路U4负级输入端连接TF、C1、C2负级和VR相连的节点。电流放大与稳流输出电路U4输出端分别连接激光二极管LD两端。脉冲宽度调制器(PWM)U2两输入端分别连接第一可变电阻VR两端，高精度基准电压电路U3输出端连接脉冲宽度调制器U2参考电压输入端，脉冲宽度调制器U2输出端连接高速开关型晶体管BJT基极。脉冲宽度调制器U2根据第一可变电阻VR两端电压的微小波动并比较基准电压调节输出脉冲宽度，进而控制BJT的导通和截至时间，从而稳定TF次级、D、C1、C2和L组成的二次整流滤波电路的输出电压。First please refer to Fig. 1, Fig. 1 is the schematic structural diagram of the drive power circuit of the low-power semiconductor laser of the present invention, as can be seen from the figure, the drive power of the low-power semiconductor laser of the present invention is made up of four parts, namely input noise reduction rectification filter circuit U1; Pulse width modulation Device U2; high precision reference voltage circuit U3; current amplification and steady current output circuit U4. The positive output end of the input noise reduction rectification filter circuit U1 is connected to one end of the primary end of the isolation transformer TF, the other end of the primary end of the isolation transformer TF is connected to the collector of a high-speed switching transistor BJT, and the emitter of the high-speed switching transistor BJT is connected to the other end of U1. One end of the secondary side of the isolation transformer TF is connected to the positive stage of the rectifier tube D, the negative stage of the rectifier tube D is connected to the node of the positive pole of the inductor L and the filter capacitor C1 , and the other end of the inductor L is connected to the positive terminal of the filter capacitor C2 . The node between the inductor L and the positive electrode of the capacitor C2 is connected to one end of the first variable resistor VR. The other end of the secondary side of the isolation transformer TF is connected to the negative stages of filter capacitors C 1 and C 2 and the other end of the first variable resistor VR, and the sliding end of the first variable resistor VR is connected to the positive input end of the current amplification and steady current output circuit U4 , the negative stage input end of the current amplification and steady current output circuit U4 is connected to the node connected to the negative stage of TF, C 1 , C 2 and VR. The output terminals of the current amplification and current stabilization output circuit U4 are respectively connected to both ends of the laser diode LD. The two input ends of the pulse width modulator (PWM) U2 are respectively connected to both ends of the first variable resistor VR, the output end of the high-precision reference voltage circuit U3 is connected to the reference voltage input end of the pulse width modulator U2, and the output end of the pulse width modulator U2 is connected to the high-speed Switching transistor BJT base. The pulse width modulator U2 adjusts the output pulse width according to the slight fluctuation of the voltage across the first variable resistor VR and compares the reference voltage, and then controls the conduction and cut-off time of the BJT, thereby stabilizing the TF secondary, D, C1, C2 and L The output voltage of the secondary rectification filter circuit composed.
电流放大及稳流输出电路U4内部电路连接如图2所示。电流放大与稳流电路U4中，稳压管D1负级连接U4正级性输入端，D1正级连接U4负级性输入端。第二可变电阻VR1一端连接U4正极性输入端，第二可变电阻VR1的另一端连接U4负极性输入端，第二可变电阻VR1的滑动端连接放大器A2正极性输入端和电容C3的节点，电容C3另一端连接U4负级性输入端。调节第二可变电阻VR1滑动端可以连续改变输入电压大小。第三可变电阻VR2一端连接U4正极性输入端，第三可变电阻VR2另一端连接U4负极性输入端，第三可变电阻VR2滑动端连接比较器A1正极性输入端，调节第三可变电阻VR2滑动端使比较器A1正极性输入端电压为+1V作为A1的参考电压。放大器A2负级性输入端和输出端之间跨接电阻R2和电容C4，输出端经电阻R4连接电流放大管T的基极。放大管T基极还连接比较器A1的输出端和100uF电解电容C5正极，电容C5负极连接U4负级性输入端。放大管T发射级经0.5Ω/2W的电阻R5连接U4负级性输入端。由R4、C5、R5和放大管T组成的电路，可以在电源突然开启时，放大器A2经R4对电容C5缓慢充电，使放大管T基极电压缓慢升高，从而使放大管T的集电极输出电流也缓慢增加，而不会产生过大的电流冲击，在电源突然关闭时，电容C5经T和电阻R5缓慢放电，使T基极电压缓慢降低，进而使放大管T的集电极输出电流缓慢减小，也不会产生过大的电流冲击。从而使电源开启或关闭时，激光二极管LD不会因过大的电流梯度而损坏。放大管T的发射级还连接放大器A2的负级性输入端和电阻R1的一端，电阻R1的另一端连接比较器A1的负级性输入端。放大管T的集电极连接激光二极管LD的负级，激光二极管LD正极连接U4正极性输出端。激光二极管LD两端并联电容C6和二极管D3，且二极管D3的极性和激光二极管LD的极性相反。放大管T发射级连接放大器A2的负级性输入端，形成电流负反馈从而稳定T集电极输出电流。比较器A1的输出端与T基极相连，其输出为放大管T提供合适的静态工作电压。当放大管T集电极输出过流时，与放大管的T发射极相连的电阻R5两端电压升高，使比较器A1负级性输入端电压超高正极性端的参考电压，比较器A1输出低电平，使放大管T截断，避免了激光二极管LD因过流而损坏。The internal circuit connection of current amplification and steady current output circuit U4 is shown in Fig. 2 . In the current amplification and current stabilization circuit U4, the negative stage of the voltage regulator tube D1 is connected to the positive input terminal of U4, and the positive stage of D1 is connected to the negative input terminal of U4. One end of the second variable resistor VR1 is connected to the positive input end of U4, the other end of the second variable resistor VR1 is connected to the negative input end of U4, and the sliding end of the second variable resistor VR1 is connected to the positive input end of the amplifier A2 and the capacitor C3. node, and the other end of the capacitor C3 is connected to the negative input end of U4. Adjusting the sliding end of the second variable resistor VR1 can continuously change the magnitude of the input voltage. One end of the third variable resistor VR2 is connected to the positive input end of U4, the other end of the third variable resistor VR2 is connected to the negative input end of U4, and the sliding end of the third variable resistor VR2 is connected to the positive input end of the comparator A1 to adjust the third adjustable The sliding terminal of the variable resistor VR2 makes the voltage of the positive input terminal of the comparator A1 be +1V as the reference voltage of A1. A resistor R2 and a capacitor C4 are connected between the negative input terminal and the output terminal of the amplifier A2, and the output terminal is connected to the base of the current amplifying tube T through the resistor R4. The base of the amplifier tube T is also connected to the output terminal of the comparator A1 and the positive terminal of the 100uF electrolytic capacitor C5, and the negative terminal of the capacitor C5 is connected to the negative input terminal of U4. The emitter stage of the amplifying tube T is connected to the negative input terminal of U4 through the resistor R5 of 0.5Ω/2W. The circuit composed of R4, C5, R5 and the amplifier tube T can slowly charge the capacitor C5 through the amplifier A2 through R4 when the power supply is turned on suddenly, so that the base voltage of the amplifier tube T increases slowly, so that the collector of the amplifier tube T The output current also increases slowly without excessive current impact. When the power supply is suddenly turned off, the capacitor C5 is slowly discharged through T and resistor R5, so that the T base voltage slowly decreases, and then the collector output current of the amplifier tube T Decrease slowly without excessive current impact. Therefore, when the power is turned on or off, the laser diode LD will not be damaged by an excessive current gradient. The emitter stage of the amplifier tube T is also connected to the negative input terminal of the amplifier A2 and one end of the resistor R1, and the other end of the resistor R1 is connected to the negative input terminal of the comparator A1. The collector of the amplifier tube T is connected to the negative stage of the laser diode LD, and the positive electrode of the laser diode LD is connected to the positive output terminal of U4. A capacitor C6 and a diode D3 are connected in parallel at both ends of the laser diode LD, and the polarity of the diode D3 is opposite to that of the laser diode LD. The emitter stage of the amplifier tube T is connected to the negative input terminal of the amplifier A2 to form a current negative feedback to stabilize the output current of the T collector. The output terminal of the comparator A1 is connected to the T base, and its output provides a suitable static working voltage for the amplifying tube T. When the output of the collector of the amplifying tube T is overcurrent, the voltage across the resistor R5 connected to the T emitter of the amplifying tube rises, so that the voltage at the negative input terminal of the comparator A1 exceeds the reference voltage at the positive terminal, and the output of the comparator A1 The low level makes the amplifying tube T cut off, avoiding the damage of the laser diode LD due to overcurrent.
场效应开关管M的漏级连接激光二极管LD的正极，该开关管M的衬垫和源级相连并连接放大管T的发射级。在开关管M的栅极和源级之间跨接电阻R3和二极管D2，二极管D2负级接M的栅极，正极接M的源级，电阻R3引出外控制信号的输入端。根据外控制信号加在开关管M栅极电平的高低，可以方便的控制该开关管M的导通和截至，进而控制流过LD电流，控制LD的工作，最终控制激光器的输出。The drain of the field effect switch M is connected to the anode of the laser diode LD, and the pad of the switch M is connected to the source and connected to the emitter of the amplifier T. Connect the resistor R3 and the diode D2 between the gate and the source of the switching tube M, the negative pole of the diode D2 is connected to the gate of M, the positive pole is connected to the source of M, and the resistor R3 leads to the input terminal of the external control signal. According to the level of the gate level of the switching tube M added by the external control signal, the on and off of the switching tube M can be conveniently controlled, and then the current flowing through the LD can be controlled, the operation of the LD can be controlled, and finally the output of the laser can be controlled.
经实验证明，本发明低功率半导体激光器的驱动电源可向低功率半导体激光器提供稳定、可靠、抗干扰强的电流，当电源突然开启或突然关闭时，使输入激光器的驱动电流缓慢上升或缓慢下降，可避免因电流突变产生过大的电流冲击而导致激光器损坏，并且可方便的实现外信号控制，输出电流连续可调，可根据需要在0～2A之间调节输出电流，电流纹波小于2％。Experiments have proved that the driving power supply of the low-power semiconductor laser of the present invention can provide a stable, reliable, and strong anti-interference current to the low-power semiconductor laser. , can avoid damage to the laser due to excessive current impact caused by sudden current changes, and can easily realize external signal control, the output current is continuously adjustable, and the output current can be adjusted between 0 and 2A according to needs, and the current ripple is less than 2 %.
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| CN100423428C (en) * | 2005-07-15 | 2008-10-01 | 中国科学院上海微系统与信息技术研究所 | An integrated power supply for short-pulse high-current laser drive |
| MX2008001325A (en) * | 2005-07-28 | 2008-03-18 | Rgb Systems Inc | Method and apparatus for implementing soft switching in a class d amplifier. |
| CN100495881C (en) * | 2005-12-21 | 2009-06-03 | 昂宝电子（上海）有限公司 | System for driving bipolar transistor and system for controlling power converter |
| CN100514776C (en) * | 2007-08-22 | 2009-07-15 | 中国科学院上海光学精密机械研究所 | Continuously adjustable nanosecond pulse semiconductor laser drive power supply |
| CN101442858B (en) * | 2007-11-23 | 2012-06-20 | 飞宏科技股份有限公司 | Laser diode driving circuit and method thereof |
| CN101567519B (en) * | 2009-05-27 | 2011-06-29 | 北京国科世纪激光技术有限公司 | Large-current pulse LD laser driving power supply |
| CN201523155U (en) * | 2009-11-05 | 2010-07-07 | 昂纳信息技术（深圳）有限公司 | A low power consumption pump driving circuit device |
| CN102427201A (en) * | 2011-11-11 | 2012-04-25 | 西安欧益光电科技有限公司 | Method for reducing delay time of green light pulse laser starting light emission and laser power supply |
| CN106300007A (en) * | 2016-10-13 | 2017-01-04 | 华北电力大学（保定） | The drive circuit for laser that the output of a kind of frequency power is stable |
| CN108899757A (en) * | 2018-05-29 | 2018-11-27 | 国科世纪激光技术（天津）有限公司 | A kind of laser for having the function of electric current and having delayed laser power supply system |
| CN109222922A (en) * | 2018-10-17 | 2019-01-18 | 南京沃福曼医疗科技有限公司 | A method of improving the anti-level interference of OCT equipment sensitive circuit |
| CN109638626B (en) * | 2019-01-30 | 2023-10-03 | 中国科学院福建物质结构研究所 | Laser Q-switching module, circuit and Q-switching control method |
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| CN2579075Y (en) * | 2002-09-30 | 2003-10-08 | 长沙市为尔自动化技术开发有限公司 | IGCT driving power supply |
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| JPS61121772A (en) * | 1984-11-16 | 1986-06-09 | Hitachi Lighting Ltd | Rush current preventing circuit of dc stabilized power source |
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