Modulator driver for lightwave systems

  • 03-Feb-2009 04:53 EST

A lithium niobate modulator driver from Narda Microwave-East is used in 300-pin MSA transponders for digital-phase-shift-keying long-reach 40-Gb/s lightwave communication systems. The FO-MDA-40-25G-1 unit combines monolithic microwave integrated circuits developed for modulator driver applications with proprietary fabrication methods. The three-stage modulator driver produces an exceptional eye pattern and has a 3-dB bandwidth of 85 kHz to 40 GHz, gain of 29 dB, input and output return loss of 12 dB, RMS additive jitter of 550 ps, and output power up to 8 Vpp with an input voltage of 450 mVpp. The device operates at a maximum data rate of 43 Gb/s, features electronic eye-crossing control of 40-70%, and has variable amplitude from 0.5-8 Vpp.
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