We describe the use of a silicon waveguide for two-photon absorption measurements in an autocorrelator which achieved a peak-power average-power sensitivity of 1 (mW)2 at 1.56 μm wavelength and which was used to measure optical pulses generated by a mode-locked fiber ring laser. The experimental results agreed with a theoretical model of the two-photon-induced photocurrent generation inside the waveguide.
Silicon waveguide two-photon absorption detector at 1.5 μm wavelength for autocorrelation measurements
T. K. Liang, H. K. Tsang, I. E. Day, J. Drake, A. P. Knights, M. Asghari; Silicon waveguide two-photon absorption detector at 1.5 μm wavelength for autocorrelation measurements. Appl. Phys. Lett. 12 August 2002; 81 (7): 1323–1325. https://doi.org/10.1063/1.1500430
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