Crosstalk in a Two Channel Coherent Fiber Optic FSK-System Using a Semiconductor Laser Amplifier.
01 January 1988
Bit-error-rate measurements on a two channel optical transmission system using a low-reflectivity laser amplifier are presented. The signal lasers are directly frequency or amplitude modulated at 1 Gbit/s. The crosstalk penalties in an FSK-FSK system are very small and mainly attributed to the residual small amplitude modulation of the lasers following from the direct frequency modulation. The crosstalk in an ASK-FSK system is considerably larger. Permanent address: Institute of Microwave Technology, Box 70033, 10044 Stockholm, Sweden