M. Teshima et al., PERFORMANCE OF MULTIWAVELENGTH SIMULTANEOUS MONITORING CIRCUIT EMPLOYING ARRAYED-WAVE-GUIDE GRATING, Journal of lightwave technology, 14(10), 1996, pp. 2277-2285
This paper proposes a novel multiwavelength simultaneous monitoring (M
SM) circuit that uses the wavelength crossover properties of an arraye
d-waveguide grating (AWG), The MSM circuit consists of an AWG, a stabi
lized semiconductor laser as a reference light, and logarithmic amplif
iers, The AWG chip is a simple planar-lightwave-circuit chip. It funct
ions as multiple optical filters, and make it possible to monitor mult
iple wavelengths simultaneously, The MSM circuit, locked to the refere
nce wavelength produced by a semiconductor laser stabilized to the 154
7.49 nm (C2H2)-C-13 absorption line, achieved 10 MHz resolution and 30
MHz stability for 24 h in the stable polarization state, Measurement
accuracy of better than 1.1 GHz can be realized even if the state of p
olarization of the input light fluctuates at random, Multiwavelength s
imultaneous monitoring is successfully demonstrated using tunable lase
rs.