M. Mesh et al., OBSERVATION OF SELF-OSCILLATING TRANSMITTANCE IN GERMANOSILICATE OPTICAL FIBERS FOLLOWING LONG EXPOSURES AT 514NM, Electronics Letters, 30(1), 1994, pp. 77-78
By using 514nm pump power levels, lower than those used before, but wi
th much longer exposure times, the authors observed strange nonlinear
transmittance effects in germanosilicate optical fibres. These phenome
na included an oscillating transmittance of the pump light and a signi
ficant influence of switching of the green pump light on the transmitt
ance at 633nm.