An extremely short header transmission and processing time in a gigabi
t wavelength-division-multiple-access (WDMA) network has been experime
ntally demonstrated. This was achieved by using parallelly processed s
ubcarrier hopping pilot-tones in combination with an array of detector
s and RF switches. The results showed that, without considering the ti
me consumed in an arbitration circuit, the total processing time of th
e hopping pilot-tone headers was as short as 40 ns which is independen
t of the number of network nodes and data transmission rate.