Compound Semiconductor Requirements for Fiber Optic Telecommunications

Mike Scott
Nortel Networks
3500 Carling Avenue, Nepean, Ontario, Canada K2H8E9

The explosive growth in network bandwidth requirements has led to a tremendous increase in the demand for high-speed fiber optic telecommunications equipment and demands for its continued bandwidth evolution.  Typically fiber systems rely on InP based devices to provide the optoelectronic functions.  This is due to their ability to source directly modulated light and to detect light in the 1.3 and 1.55 nm wavelength bands for fiber transmission.  Key attributes are temporal with spectral purity and modulation bandwidth.  For the electronics, in particular the very high speed analogue transmit and receive functions, GaAs based integrated circuits continue to be deployed for the highest speed leading edge systems.  Key attributes are timing jitter and small and large signal amplification.  In this paper I will discuss the particular III-V technology requirements for a 10 Gb/s high performance fiber system, and use this example to highlight some of the requirements of current and future systems.



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