Research on Drive and Control Technology of Ezternal Modulated DFB Laser Diode
We attempt to study external modulation characteristics in 1550nm microwave over fiber links which overcome the disadvantages of light spectrum expansion and unstable optical extinction ratio because of direct modulation. The relation property between output power,threshold current and temperature is discussed at first based on physical model of a multiple quantum-well-distributed feedback (MQW-DFB) laser diode (LD). This paper focuses on the corresponding power and temperature control circuits which are set up to make the optical power changing within 0.5% and temperature control precision better than 0.3℃. Experimental results show that external modulation light emitting module composed by the 1550nm MQW-DFB laser diode and corresponding driving circuits can effectively improve output light power stability. As an application,we realize 10GHz microwave transmission over fiber links with high linearity and low distortion.
microwave photonics ezternal modulation power control threshold current.
Xiaoqing Zhang Dong Li Yinan Chen Lei Liao Zhengjie Dong
School of Optoelectronic Information & Telecommunication Engineering,Beijing Information Science & Technology University Haidian District Qinghe Xiaoying East Road 12,100192 Beijing,China
国际会议
2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)
北京
英文
3089-3093
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）