公开(公告)号：US5499258A

公开(公告)日：1996-03-12

申请号：US353125

申请日：1994-12-09

申请人： Michinao Kawano ,  Setsuo Misaizu ,  Tomoko Anzai ,  Takashi Tsuda

发明人： Michinao Kawano ,  Setsuo Misaizu ,  Tomoko Anzai ,  Takashi Tsuda

IPC分类号： H04B10/293 ,  H01S5/00 ,  H01S5/024 ,  H01S5/042 ,  H01S5/06 ,  H04B10/07 ,  H04B10/564 ,  H04B10/572 ,  H01S3/04

CPC分类号： H01S5/02415 ,  H01S5/02453 ,  H01S5/0425

摘要： An automatic temperature control circuit of a laser diode solves a problem that a temperature control becomes unstable when switching to heat or cool the laser diode. In the circuit, a peltier element changes the temperature of the laser diode by heating or cooling, a temperature detecting section detects the temperature of the laser diode and outputs the corresponding detected voltage, an error amplifying section outputs an error voltage by comparing the detected outputted voltage with a fixed value, a peltier current control section controls the direction of a driving current flowing to the peltier element in correspondence with an error voltage outputted from the error amplifying section. In addition, there is provided a circuit which feed-backs a voltage corresponding to the driving current flowing to the peltier element to an input side of the error amplifying section and adds it to the detected voltage outputted from the temperature detecting section.

摘要翻译： 激光二极管的自动温度控制电路解决了当切换到加热或冷却激光二极管时温度控制变得不稳定的问题。 在电路中，珀耳帖元件通过加热或冷却来改变激光二极管的温度，温度检测部分检测激光二极管的温度并输出相应的检测电压，误差放大部分通过比较检测到的输出 珀尔帖电流控制部分对应于从误差放大部分输出的误差电压来控制流向珀耳帖元件的驱动电流的方向。 此外，提供了一种电路，其将与流过珀尔帖元件的驱动电流相对应的电压反馈到误差放大部分的输入侧，并将其与从温度检测部分输出的检测电压相加。