optical fiber transmission window makes it possible to realize high-quality IMDD
transmission systems at that wavelength. There is much scope for further work to
improve component performance, particularly source output power, RIN, and
modulation sensitivity; modulator insertion loss, power handl ing, and V
; and
photodetector power handling.
The capability of coherent systems to select between many channels present on
the same optical fiber makes them attractive in applications such as multiple
antenna remoting. They also enable wide dynamic range transmission systems to
be realized at wavelengths where high-quality optical amplifiers are not available,
and, using angle modulation, to obtain SNRs beyond those obtainable with IMDD
systems for long