Aallonpituuden stabilointi WDM-järjestelmän lähettimessä

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	Aallonpituuden stabilointi WDM-järjestelmän lähettimessä
其他题名	Aallonpituuden stabilointi WDM-järjestelmän lähettimessä
	RISTIMAEKI, HEMMO; SALOMAA, ARI
	2000-03-30
专利权人	NOKIA NETWORKS OY
公开日期	2000-03-30
授权国家	芬兰
专利类型	发明申请
摘要	The wavelength generated by lasers used in WDM systems exhibits a dependence on ambient temperature. This is because the thermal connection between the laser and the thermistor that monitors the laser temperature is not ideal. In prior-art solutions, the laser stability problem is resolved by incorporating components that stabilise wavelength in the laser module. In the present invention, non-idealness is compensated by using an external compensation circuit to change the thermistor temperature setting a. Compensation can be provided in the form of full compensation or over-compensation.; Compensation can be effected by means of a control loop feedback that causes the control signal from the control circuit to the cooling element to have such an effect on the control circuit input that when the ambient temperature changes, the control signal from the control circuit is restricted, so that the laser temperature and, thus, wavelength, remain at the rated values. Compensation can also be provided by making the reference input of the comparison means included in the control loop responsive to the ambient temperature.
其他摘要	由WDM系统中使用的激光器产生的波长表现出对环境温度的依赖性。这是因为激光器和监控激光器温度的热敏电阻之间的热连接并不理想。在现有技术的解决方案中，通过结合使激光模块中的波长稳定的部件来解决激光稳定性问题。在本发明中，通过使用外部补偿电路来改变热敏电阻温度设置a来补偿非理想性。赔偿可以全额赔偿或过度赔偿的形式提供。可以通过控制回路反馈实现补偿，该控制回路反馈使得来自控制电路的控制信号到冷却元件对控制电路输入具有这样的影响：当环境温度改变时，来自控制电路的控制信号受到限制，使激光温度和波长保持在额定值。还可以通过使响应于环境温度的控制回路中包括的比较装置的参考输入来提供补偿。
主权项	A method for stabilising the wavelength of an optical transmitter in an optical transmission system using wavelength multiplexing to make it immune to ambient temperature, where the temperature of the laser diode is measured by a thermistor placed in the vicinity of the laser diode and the temperature is regulated by means of a cooling element, a control circuit, in response to a deviation from the temperature setting measured by the thermistor, sends a control signal to the cooling element, in response to which the cooling elements heats or cools the laser diode, the thermal connection between the thermistor and laser diode is non-ideal, with the temperature measured by the thermistor being different from the temperature of the laser diode, c h a r a c t e r i z e d in that non-idealness is compensated by changing the thermistor temperature setting in response to changes in ambient temperature.
申请日期	1998-09-29
专利号	FI982094A
专利状态	失效
申请号	FI1998002094
公开（公告）号	FI982094A
IPC 分类号	H01S5/068 \| H01S5/00 \| H01S5/024 \| H04B
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/181661/51212
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	RISTIMAEKI, HEMMO,SALOMAA, ARI. Aallonpituuden stabilointi WDM-järjestelmän lähettimessä. FI982094A[P]. 2000-03-30.

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