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Low-loss 1.3-/spl mu/m MQW electroabsorption modulators for high-linearity analog optical links

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8 Author(s)
Loi, K.K. ; Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA ; Hodiak, J.H. ; Mei, X.B. ; Tu, C.W.
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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-/spl mu/m wavelength. The electrooptic slope efficiency of an 185-/spl mu/m-long 11-GHz bandwidth device is equivalent to a Mach-Zehnder modulator with a V/sub /spl pi// 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.Hz/sup 4/5/ have been achieved with 16 mW input optical carrier power. The measured 3-dB electrical bandwidth exceeds 20 GHz for a 90-/spl mu/m-long device.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 11 )

Date of Publication:

Nov. 1998

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