Laserlähetin

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	Laserlähetin
其他题名	Laserlähetin
	SALOMAA, ARI
	2000-07-01
专利权人	NOKIA NETWORKS OY
公开日期	2000-07-01
授权国家	芬兰
专利类型	发明申请
摘要	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.
其他摘要	本发明基于以下思想：通过在冷却器控制电流TEC中引入精确预定义的变化，可以以受控方式改变WDM系统中的激光发射器的波长。这反过来影响冷却器的加热或冷却操作的受控变化。结果，由激光器产生的光的波长发生预定的变化。温度控制电路确保激光温度和波长精确保持在新值。对于每个所需波长，由预设激光温度值，激光功率值和激光调制偏差值组成的参数组已预先保存在存储器中。当要改变激光波长时，从存储器中检索对应于波长的参数值并将其馈送到激光器。检索和进给可以预先编程或手动执行。
主权项	A method to change the wavelength of an optical transmitter in a system that uses wavelength division multiplexing, where the temperature of a laser diode, whose wavelength depends on its temperature, is measured by means of a thermistor placed near the laser diode and the temperature is regulated by means of a cooler, the temperature control circuit sends, in response to any departure from the pre-set temperature as measured by the thermistor, a control signal to the laser cooler to heat or cool the laser diode, characterized inthat pre-set temperature values corresponding to the desired wavelengths are saved in storage in advance including the values of the electric quantities that essentially affect the temperature of the laser, and to switch the laser to another wavelength: a pre-set temperature value corresponding to the desired wavelength is retrieved from storage including the values of the electric quantities associated with this value, and the values are fed to the transmitter to control its operation.
申请日期	1998-12-31
专利号	FI982843A
专利状态	未确认
申请号	FI1998002843
公开（公告）号	FI982843A
IPC 分类号	H04B10/155 \| H01S5/062 \| H01S5/06 \| H04B10/572 \| H04B10/50 \| H01S5/00 \| H01S5/068 \| H01S5/024 \| H04B10/152 \| H04B10/564 \| H04J14/02 \| H01S
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/51232
专题	半导体激光器专利数据库
作者单位	NOKIA NETWORKS OY
推荐引用方式 GB/T 7714	SALOMAA, ARI. Laserlähetin. FI982843A[P]. 2000-07-01.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
FI982843A.PDF（55KB）	专利		开放获取	CC BY-NC-SA	请求全文