J. M. Chavez-Boggio, D. Bodenmüller, A. Baig, S. Ahmed, T. Hansson, F. Talenti, S. Wabnitz, D. Modotto
“Frequency comb generation in silicon nitride ring resonators with amplitude modulated pump”
Proc. SPIE 11672, Laser Resonators, Microresonators, and Beam Control XXIII, 1167206 (5 March 2021);
The article investigates frequency comb generation in silicon nitride ring resonators by using a pump subject to a weak amplitude modulation. It shows that a partial locking is obtained when the external modulation frequency differs from the resonator free-spectral-range by up to hundreds of MHz.
Keywords: Frequency comb, silicon nitride ring resonators, amplitude modulated pump, coherence.
The article can be read following this link
Gabriel Marty, Sylvain Combrié, Fabrice Raineri and Alfredo De Rossi
“Photonic crystal optical parametric oscillator”
Nature Photonics, 15, January 2021, pp. 53–58
Teams at Thales and C2N have developed a new miniaturized source of light called Photonic Crystal Optical Parametric Oscillator. An Optical Parametric Oscillator (OPO) is similar to a laser as it generates coherent light, namely photons having the same frequency, direction and polarization, except that here photons are emitted in pairs. These pairs are correlated, meaning that their perturbations (e.g. fluctuation of their frequency) are not independent. This property is exploited in many ways, in particular to decrease the noise in sensitive measurements (quantum sensing), to encode and encrypt information (quantum communication) and also to perform computing. More info.
The article can be read following this link.