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	Laser temperature controller
	KOLLANYI MIKLOS J.
	1991-11-12
著作权人	GTE COMMUNICATION SYSTEMS CORPORATION
专利号	CA1292050C
国家	加拿大
文献子类	授权发明
其他题名	Laser temperature controller
英文摘要	LASER TEMPERATURE CONTROLLER ABSTRACT OF THE INVENTION A laser temperature controller is disclosed for controlling the temperature of a laser device. The controller includes a bridge circuit connected to a thermistor device which is mounted on the laser package. The bridge circuit generates error signals representing a need for cooling or heating as the operating temperature of the laser rises or falls about a set threshold. A voltage conversion circuit converts the error signals to a positive or negative polarity voltage, The output of the voltage conversion circuit is applied to a pair of operational amplifiers which input the voltage and compare it to a set reference voltage. When cooling is required a first amplifier provides a biasing voltage to a transistor when a set threshold is exceeded. The associated transistor switches drive current to a thermoelectric device mounted on the laser package thereby, cooling the laser. Similarly, when heating is required a second amplifier and transistor switches current of an opposite polarity to the thermoelectric device, which heats the laser. The output signal from the voltage conversion circuit is also applied to a laser temperature alarm circuit which provides a visual indication and an alarm signal to a controller interface when a set threshold of laser temperature is exceeded.
公开日期	1991-11-12
申请日期	1987-11-19
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/35874]
专题	半导体激光器专利数据库
作者单位	GTE COMMUNICATION SYSTEMS CORPORATION
推荐引用方式 GB/T 7714	KOLLANYI MIKLOS J.. Laser temperature controller. CA1292050C. 1991-11-12.

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