Laser diode control apparatus

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	Laser diode control apparatus
其他题名	Laser diode control apparatus
	RIES, GORDON
	1990-05-08
专利权人	ALCATEL NETWORK SYSTEM INC.
公开日期	1990-05-08
授权国家	美国
专利类型	授权发明
摘要	Control of the amplitude of data modulation applied to a laser diode is critical to prevent excessive wavelength shift and resultant dispersion of the signal in the waveguide at high data rates. The present invention utilizes the intermodulation products of two low frequency signals superimposed upon the modulation signal to produce detected products which are separated into appropriate components and utilized to control the amplitude of the modulation signal such that its logic 0 level occurs at a given optimum point. A further complementary and interacting control loop is utilized to control the bias point or center point for this data modulation signal.
其他摘要	控制施加到激光二极管的数据调制的幅度对于防止过高的波长偏移以及在高数据速率下导致信号在波导中的分散是至关重要的。本发明利用叠加在调制信号上的两个低频信号的互调产物来产生检测产物，这些产物被分成适当的分量并用于控制调制信号的幅度，使得其逻辑0电平出现在给定的最佳点。利用另一个互补和相互作用的控制环来控制该数据调制信号的偏置点或中心点。
主权项	Laser diode wavelength shift control apparatus comprising, in combination: laser diode first means, including signal input means and signal output means, said first means changing in operational wavelength as a function of current passing therethrough, where the function includes a non-linear "knee"; signal source second means, connected to said input means of said first means, for passing a given frequency binary data first signal through said first means wherein the two logic levels alter current levels in said first means between opposite sides of said "knee"; intermodulation signal source third means, connected to said first means, for superimposing upon said data first signal intermodulation second and third signals, whose frequencies are different and are both low compared to the data rate of said first signal, the second and third signals creating maximum intermodulation signal levels when the current in said first means corresponds to said "knee"; second signal frequency amplitude detection and feedback fourth means, connected between said output means of said first means and said third means, for adjusting the amplitude of said second signal toward a value whereby the amplitude of said second signal frequency components appearing at said output means of said first means is maintained constant; and intermodulation signal frequency amplitude detection and feedback fifth means, connected between said output means of said first means and said second means, for adjusting the amplitude of said first signal toward a value whereby the amplitude of said intermodulation frequency components appearing at said output means of said first means is maintained constant.
申请日期	1989-07-25
专利号	US4924470
专利状态	失效
申请号	US07/384626
公开（公告）号	US4924470
IPC 分类号	H01S5/00 \| H01S5/068 \| H01S5/062 \| H01S5/0683 \| H01S3/10
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/181661/44552
专题	半导体激光器专利数据库
作者单位	ALCATEL NETWORK SYSTEM INC.
推荐引用方式 GB/T 7714	RIES, GORDON. Laser diode control apparatus. US4924470[P]. 1990-05-08.

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