Small-Signal Power Measuring Technique for Measuring the Frequency Response of Electroabsorption Modulators

Author

Huang, H.P. ; Zhu, N.H. ; Hasen, Q.Q.G. ; Liu, Y. ; Wang, X. ; Pun, E.Y.B. ; Chung, P.S.

Author_Institution

Inst. of Semicond., State Key Lab. on Integrated Optoelectronics, Beijing

Volume

18

Issue

23

fYear

2006

Firstpage

2451

Lastpage

2453

Abstract

We propose and demonstrate measurement of the frequency response of an electroabsorption (EA) modulator using an extended small-signal power measuring technique. In this technique, the modulator is driven by a microwave carrier amplitude modulated by a low-frequency signal, and the modulator frequency response is obtained without the need of a high-speed photodetector. Based upon the nonlinear characteristics of the EA modulator and the underlying principle of the present method, equations have been derived. A measurement scheme using a network analyzer and a low-speed photodetector has been proposed and constructed, and the experimental results confirm that our proposed method is as accurate as the swept-frequency measurement using a network analyzer directly

Keywords

electro-optical modulation; electroabsorption; frequency measurement; network analysers; photodetectors; electroabsorption modulators; frequency response; low-frequency signal; low-speed photodetector; microwave carrier amplitude modulation; modulator frequency response; network analyzer; nonlinear characteristics; small-signal power measuring technique; swept-frequency measurement; Amplitude modulation; Frequency measurement; Frequency modulation; Frequency response; High speed optical techniques; Microwave theory and techniques; Nonlinear optics; Optical modulation; Power measurement; Q measurement; Electroabsorption (EA) modulator; frequency response; small-signal power measuring technique;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.886850

Filename

4012080