All-optical integrators are key devices for the realization of ultra-fast passive photonic networks, and, despite their broad applicability range(e.g., photonic bit counting, optical memory units, analogue computing, ...All-optical integrators are key devices for the realization of ultra-fast passive photonic networks, and, despite their broad applicability range(e.g., photonic bit counting, optical memory units, analogue computing, etc.), their realization in an integrated form is still a challenge. In this work, an all-optical integrator based on a silicon photonic phase-shifted Bragg grating is proposed and experimentally demonstrated, which shows a wide operation bandwidth of 750 GHz and integration time window of 9 ps. The integral operation for single pulse, inphase pulses, and π-shifted pulses with different delays has been successfully achieved.展开更多
The fabricated gratings used for an 800-nm compressed laser pulse have more than 90% di?raction e?ciency in the –1st order for TE polarization within 760–860 nm, and the maximum value is 94.3%. The laserinduced dama...The fabricated gratings used for an 800-nm compressed laser pulse have more than 90% di?raction e?ciency in the –1st order for TE polarization within 760–860 nm, and the maximum value is 94.3%. The laserinduced damage threshold(LIDT) of the gratings increases from 0.53 to 0.75 J/cm 2 in the normal beam in a pulse width τ of 40–100 fs. The LIDT of the gratings is observed a τ 0. 25 scaling in the pulse width region. The damage morphologies of the gratings indicate that the initial damage of the gratings locates at the grating lines, a position that coincides with that of the electric field maximum.展开更多
基金National Natural Science Foundation of China(NSFC)(61475052,61622502)
文摘All-optical integrators are key devices for the realization of ultra-fast passive photonic networks, and, despite their broad applicability range(e.g., photonic bit counting, optical memory units, analogue computing, etc.), their realization in an integrated form is still a challenge. In this work, an all-optical integrator based on a silicon photonic phase-shifted Bragg grating is proposed and experimentally demonstrated, which shows a wide operation bandwidth of 750 GHz and integration time window of 9 ps. The integral operation for single pulse, inphase pulses, and π-shifted pulses with different delays has been successfully achieved.
基金supported by the National "863" Program of Chinathe National Natural Science Foundation of China(Nos.10704079 and 11104295)
文摘The fabricated gratings used for an 800-nm compressed laser pulse have more than 90% di?raction e?ciency in the –1st order for TE polarization within 760–860 nm, and the maximum value is 94.3%. The laserinduced damage threshold(LIDT) of the gratings increases from 0.53 to 0.75 J/cm 2 in the normal beam in a pulse width τ of 40–100 fs. The LIDT of the gratings is observed a τ 0. 25 scaling in the pulse width region. The damage morphologies of the gratings indicate that the initial damage of the gratings locates at the grating lines, a position that coincides with that of the electric field maximum.
