Optical Wavelength Meter 3 synchornized resonantors dt1 = dt2 = 2*dt0 0 -5 Power transfer function (dB) -10 -15 -20 -25 -30 179 0 10 20 30 40 50 60 Frequency (GHz) 70 80 90 100 Figure 2.4.14 Transfer functions of tree configuration of Michelson interferometers with asyn- chronized tuning. Three filters are identical but with Dt 1 ¼ Dt 2 ¼ Dt 0 .