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Small-signal power measuring technique for measuring the frequency response of electroabsorption modulators

  • H. P. Huang*
  • , N. H. Zhu
  • , Q. Q.G. Hasen
  • , Y. Liu
  • , X. Wang
  • , E. Y.B. Pun
  • , C. P.S. Chung
  • *Corresponding author for this work
  • CAS - Institute of Semiconductors
  • City University of Hong Kong

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)2451-2453
Number of pages3
JournalIEEE Photonics Technology Letters
Volume18
Issue number23
DOIs
StatePublished - 1 Dec 2006
Externally publishedYes

Keywords

  • Electroabsorption (EA) modulator
  • Frequency response
  • Small-signal power measuring technique

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