Title :
A New Method for Measuring the Frequency Response of Broadband Optoelectronic Devices
Author :
Wu, Xuming ; Man, Jiangwei ; Xie, Liang ; Liu, Jianguo ; Liu, Yu ; Zhu, Ninghua
Author_Institution :
State Key Lab. on Integrated Optoelectron., Inst. of Semicond., Beijing, China
Abstract :
A new and simple method based on the frequency-sweep method for measuring the frequency response of broadband optoelectronic devices is demonstrated. The electro-absorption modulator (EAM) can function as both modulator and receiver with the same frequency response. With this property, the frequency responses of a distributed feedback (DFB) laser at different bias currents were measured from dc to 20 GHz by the method. The results were quite identical with the results measured by the frequency-sweep method with broadband photodetector. Besides, the measurement bandwidth is not limited by the bandwidths of the devices, and the results are not influenced by the bandwidths of the EAM or other devices.
Keywords :
distributed feedback lasers; electro-optical modulation; electroabsorption; frequency response; optoelectronic devices; bias currents; broadband optoelectronic devices; broadband photodetector; distributed feedback laser; electro-absorption modulator; frequency response measurement; frequency-sweep method; receiver; Frequency measurement; Frequency modulation; Frequency response; Measurement by laser beam; Photodetectors; Receivers; Broadband devices; DFB laser; electronic-absorption modulator; frequency response;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2213297
