During the last year the high power laser diodes jumped over the 1 kW level of CW power for a stack, and the commercial 1 cm bars reached 100 W output optical power at the standard wavelengths around 800 nm and 980 nm...During the last year the high power laser diodes jumped over the 1 kW level of CW power for a stack, and the commercial 1 cm bars reached 100 W output optical power at the standard wavelengths around 800 nm and 980 nm. The prices are reaching the industry acceptable levels. All Nd∶YAG and fiber industrial lasers manufacturers have developed kW prototypes. Those achievements have set new requirements for the power supplies manufactuers-high and stable output current, and possibilities for fast control of the driving current, keeping safe the expensive laser diode. The fast switching frequencies also allow long range free space communications and optical range finding. The high frequencies allow the design of a 3D laser radar with high resolution and other military applications. The prospects for direct laser diode micro machining are also attractive.展开更多
Abstract---The stability of the drive current is very important for a laser driver, while it is difficult to maintain the current stable at a high value for the laser driver. On the other hand, the range of the drive ...Abstract---The stability of the drive current is very important for a laser driver, while it is difficult to maintain the current stable at a high value for the laser driver. On the other hand, the range of the drive current is expected to be as wide as possible to be applied to different kinds of lasers. In this paper, a high current laser driver for the superluminescent light emitting diode （SLED） is presented, which is used in the optic fiber gyro embedded by a 0.35 μm bipolar complementary metal-oxide-semiconductor transistor （BiCMOS） process. The laser driver provides automatic power control and certain value of current determined by the external resister. The system is based on the optic-electric feedback theory and uses the closed-loop control technique to maintain the drive current stable. The system is capable of producing stable current ranges from 4 mA to 200 mA when the value of external resister changes.展开更多
介绍了一种低功耗高速垂直腔表面发射激光器(VCSEL)驱动器的设计。该芯片设计使用国产0.13μm SOI CMOS工艺,能提供6~8mA可调调制电流及4~7mA可调偏置电流。驱动电路采用多级级联放大并结合无源电感并联峰化技术,用以拓展带宽。测试结...介绍了一种低功耗高速垂直腔表面发射激光器(VCSEL)驱动器的设计。该芯片设计使用国产0.13μm SOI CMOS工艺,能提供6~8mA可调调制电流及4~7mA可调偏置电流。驱动电路采用多级级联放大并结合无源电感并联峰化技术,用以拓展带宽。测试结果表明,该电路在1.2V单电源工作电压下,最高工作速率可达5Gbit/s,总功耗仅为48mW。展开更多
为了降低主振荡放大激光器(Master oscillator power amplifier,MOPA)光纤激光器驱动系统的热耗散、提高其电光效率和单脉冲输出能量,提出了一种风冷恒温运行技术和智能程控电源方法。基于驱动电源的总体设计目标,从制冷方式、制冷器件...为了降低主振荡放大激光器(Master oscillator power amplifier,MOPA)光纤激光器驱动系统的热耗散、提高其电光效率和单脉冲输出能量,提出了一种风冷恒温运行技术和智能程控电源方法。基于驱动电源的总体设计目标,从制冷方式、制冷器件的选择等方面进行了研究,实现了对整个激光器系统温度的精确控制,系统运行温度误差为±0.5℃。研究了放大抽运源激光输出能量、输入电压随输入电流的关系,实现了抽运源恒流驱动电流大于10 A,脉冲驱动电流大于20 A的设计要求。实验结果对MOPA光纤激光器的优化设计具有重要的参考作用。展开更多
文摘During the last year the high power laser diodes jumped over the 1 kW level of CW power for a stack, and the commercial 1 cm bars reached 100 W output optical power at the standard wavelengths around 800 nm and 980 nm. The prices are reaching the industry acceptable levels. All Nd∶YAG and fiber industrial lasers manufacturers have developed kW prototypes. Those achievements have set new requirements for the power supplies manufactuers-high and stable output current, and possibilities for fast control of the driving current, keeping safe the expensive laser diode. The fast switching frequencies also allow long range free space communications and optical range finding. The high frequencies allow the design of a 3D laser radar with high resolution and other military applications. The prospects for direct laser diode micro machining are also attractive.
文摘Abstract---The stability of the drive current is very important for a laser driver, while it is difficult to maintain the current stable at a high value for the laser driver. On the other hand, the range of the drive current is expected to be as wide as possible to be applied to different kinds of lasers. In this paper, a high current laser driver for the superluminescent light emitting diode （SLED） is presented, which is used in the optic fiber gyro embedded by a 0.35 μm bipolar complementary metal-oxide-semiconductor transistor （BiCMOS） process. The laser driver provides automatic power control and certain value of current determined by the external resister. The system is based on the optic-electric feedback theory and uses the closed-loop control technique to maintain the drive current stable. The system is capable of producing stable current ranges from 4 mA to 200 mA when the value of external resister changes.
文摘介绍了一种低功耗高速垂直腔表面发射激光器(VCSEL)驱动器的设计。该芯片设计使用国产0.13μm SOI CMOS工艺,能提供6~8mA可调调制电流及4~7mA可调偏置电流。驱动电路采用多级级联放大并结合无源电感并联峰化技术,用以拓展带宽。测试结果表明,该电路在1.2V单电源工作电压下,最高工作速率可达5Gbit/s,总功耗仅为48mW。
