Harmonic signals from electroabsorption modulators for bias control |
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| Authors: | Li G.L. Liu Y.Z. Welstand R.B. Sun C.K. Chen W.X. Zhu J.T. Pappert S.A. Yu P.K.L. |
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| Affiliation: | Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA; |
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| Abstract: | Harmonic signals reflected from electroabsorption modulators are measured and analyzed as a function of modulator bias. The second-harmonic signal exhibits a dip close to the bias where the maximum of RF link gain occurs, over a significant optical power range. Using an equivalent circuit analysis we show this is caused by the inherent electroabsorption effect. The second-harmonic signal can be exploited for dynamic self-bias control of electroabsorption modulators in analog fiber-optic links |
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