LN optical modulator
A device that converts an electrical data signal into an optical data stream via the electro-optic effect of a LiNbO3 crystal. Input electrical "0", "1" signals are converted to the optical signals "ON", "OFF". One of the LN modulator's features is modulation with minimal wavelength chirping. This is a desirable characteristic for ultra high-speed, long haul, and WDM (Wavelength Division Multiplexing) transmission. For this reason, LN modulators are widely adopted in next-generation 40Gbps transmission systems, terrestrial trunk transmission systems, and submarine transmission systems.
 40Gbps Dual-Drive LN Optical Modulator, 40Gbps Single-Drive LN Optical Modulator
Dual-drive devices are driven by 2 electrical complementary signals (for example, "1001" and "0110"). Single-drive devices work with a single electrical signal being input. Both types of LN modulators are available from Fujitsu to meet customer's requirements.
 Modulator control DC bias
To achieve optimum operation from a LN modulator, a DC voltage (modulator control DC bias) must be applied in addition to the data signal. Since the optimum DC bias drifts over time, the modulator control DC bias must be adjusted by monitoring the optical output signal from the modulator.
Fujitsu is a leading provider of customer-focused IT and communications solutions for the global marketplace. Pace-setting technologies, highly reliable computing and telecommunications platforms, and a worldwide corps of systems and services experts uniquely position Fujitsu to deliver comprehensive solutions that open up infinite possibilities for its customers' success. Headquartered in Tokyo, Fujitsu Limited (TSE:6702) reported consolidated revenues of 4.6 trillion yen (US$38 billion) for the fiscal year ended March 31, 2003.
For more information, please see: www.fujitsu.com
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Press Release ID: 2003-0013E
Date: 21 January, 2003
Company: Fujitsu Limited, , , , ,
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