Low-loss 1.3-μm MQW electroabsorption modulators forhigh-linearity analog optical links |
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Authors: | Loi KK Hodiak JH Mei XB Tu CW Chang WSC Nichols DT Lembo LJ Brock JC |
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Affiliation: | Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA; |
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Abstract: | Low-loss InAsP-GaInP multiquantum-well electroabsorption waveguide modulators have been developed for transmitting microwaves as subcarriers over optical fibers. The fiber-to-fiber insertion loss is only 5 dB at 1.32-μm wavelength. The electrooptic slope efficiency of an 185-μm-long 11-GHz bandwidth device is equivalent to a Mach-Zehnder modulator with a Vπ of 2.2 V. The linearity performance was characterized for a test link without any form of amplification. A RF-to-RF link efficiency of -25.5 dB, noise figure of 27 dB and suboctave spurious-free dynamic range of 114 dB.Hz4/5 have been achieved with 16 mW input optical carrier power. The measured 3-dB electrical bandwidth exceeds 20 GHz for a 90-μm-long device |
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