公开(公告)号：US20010036210A1

公开(公告)日：2001-11-01

申请号：US09864644

申请日：2001-05-23

Applicant: Nokia Networks Oy

Inventor： Ari Salomaa

IPC: H01S003/13 ,  H01S003/04

CPC classification number: H04B10/564 ,  H01S5/02415 ,  H01S5/0612 ,  H01S5/0622 ,  H01S5/06804 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02

Abstract: The invention is based on the idea that wavelength of a laser transmitter in a WDM system can be changed in a controlled fashion by inducing an accurately pre-defined change in the cooler control current TEC. This, in turn, effects a controlled change in the heating or cooling operation of the cooler. As a result, a predetermined change takes place in the wavelength of the light generated by the laser. The temperature control circuit ensures that the laser temperature and, thus, wavelength, are maintained exactly at the new value. For each desired wavelength, a parameter set consisting of a pre-set laser temperature value, a laser power value and laser modulation bias values has been saved in storage in advance. When the laser wavelength is to be changed, the parameter values corresponding to the wavelength are retrieved from the storage and fed to the laser. Retrieval and feeding can be pre-programmed or carried out manually.

Abstract translation: 本发明基于以下思想：WDM系统中的激光发射器的波长可以通过引导冷却器控制电流TEC中的精确预定义的变化而以受控的方式改变。 这反过来又影响到冷却器的加热或冷却操作的受控变化。 结果，在由激光产生的光的波长中发生预定的变化。 温度控制电路确保激光器的温度，因此保持波长，准确地保持在新的值。 对于每个期望的波长，预先存储了由预设的激光温度值，激光功率值和激光调制偏置值组成的参数集。 当要改变激光波长时，从存储器中取出对应于波长的参数值并将其馈送到激光器。 检测和进给可以手动预编程或执行。