Zobrazeno 1 - 10
of 454
pro vyhledávání: '"Bretenaker, Fabien"'
We propose and numerically test a novel concept for asymmetric vortex beam generation in a Degenerate Vertical External Cavity Surface Emitting Laser (DVECSEL). The method is based on a phase-locking ring array of lasers created inside a degenerate c
Externí odkaz:
http://arxiv.org/abs/2409.18477
Autor:
Trinh, Duc-Anh, V., Adwaith K., Branco, Mickael, Rouxel, Aliénor, Welinski, Sacha, Berger, Perrine, Goldfarb, Fabienne, Bretenaker, Fabien
Publikováno v:
Applied Physics Letters 125, 154001 (2024)
We propose and demonstrate a modulation transfer protocol to increase the detection sensitivity of a Rydberg RF receiver to fields out of resonance from the transition between Rydberg levels. This protocol is based on a phase modulation of the contro
Externí odkaz:
http://arxiv.org/abs/2405.03618
Light induced non-equilibrium spin noise spectroscopy is theoretically and experimentally shown to be an efficient technique to reveal the structure and the coherent effects in the probed transition. Indeed, using metastable helium, the spin noise sp
Externí odkaz:
http://arxiv.org/abs/2212.00401
When locking the frequency of a laser to an optical cavity resonance, the residual amplitude modulation (RAM), which accompanies the phase modulation necessary to build the error signal, is a major limitation to the frequency stability. We show that
Externí odkaz:
http://arxiv.org/abs/2107.12057
Autor:
Kumar, Shashank, Debnath, Bapan, S., Meena M., Fade, Julien, Dhar, Sankar, Alouini, Mehdi, Bretenaker, Fabien, Ramachandran, Hema
Publikováno v:
OSA Continuum Vol. 4, Issue 5, pp. 1649-1657 (2021)
We report experiments conducted in the field in the presence of fog, that were aimed at imaging under poor visibility. By means of intensity modulation at the source and two-dimensional quadrature lock-in detection by software at the receiver, a sign
Externí odkaz:
http://arxiv.org/abs/2105.08524
Autor:
Bouasria, Yousra, Chatterjee, Debanuj, Goldfarb, Fabienne, Hassouni, Yassine, Bretenaker, Fabien
Phase sensitive amplifiers (PSA), contrary to usual phase insensitive amplifiers (PIA), are in principle capable to achieve noiseless amplification, i.e. exhibit a quantum-limited noise figure (NF) of 0 dB. When implemented using four-wave mixing (FW
Externí odkaz:
http://arxiv.org/abs/2012.09031
Autor:
Chatterjee, Debanuj, Bouasria, Yousra, Xie, Weilin, Labidi, Tarek, Goldfarb, Fabienne, Fsaifes, Ihsan, Bretenaker, Fabien
Publikováno v:
JOSA B 37, 2405 (2020)
We numerically simulate the distortion of an analog signal carried in a microwave photonics link containing a phase sensitive amplifier (PSA), focusing mainly on amplitude modulation format. The numerical model is validated by comparison with experim
Externí odkaz:
http://arxiv.org/abs/2009.05399
Autor:
Gredat, Grégory, Liu, Hui, Cotxet, Jérémie, Tricot, François, Gutty, François, Goldfarb, Fabienne, Sagnes, Isabelle, Bretenaker, Fabien
Publikováno v:
Journal of the Optical Society of America B 37, 1996 (2020)
We report the implementation and performance of a double servo-loop for intensity and phase-difference active stabilization of a dual-frequency vertical external--cavity surface-emitting laser (DF-VECSEL) for coherent population trapping (CPT) of ces
Externí odkaz:
http://arxiv.org/abs/2009.05046
Autor:
Bouasria, Yousra, Chatterjee, Debanuj, Xie, Weilin, Fsaifes, Ihsan, Goldfarb, Fabienne, Hassouni, Yassine, Bretenaker, Fabien
Publikováno v:
JOSA B 37, 2745 (2020)
A semi-classical 7-wave model is developed to investigate the noise performances of a degenerate dual-pump phase sensitive amplifier. This approach takes into account the transfer to the signal, through multiple four-wave mixing processes, of the vac
Externí odkaz:
http://arxiv.org/abs/2009.04940
Publikováno v:
Phys. Rev. A 102, 043503 (2020)
The different dynamical behaviors of the Hermite-Gaussian (HG) modes of mode-locked nanolasers based on a harmonic photonic cavity are investigated in detail using a model based on a modified Gross-Pitaevskii Equation. Such nanolasers are shown to ex
Externí odkaz:
http://arxiv.org/abs/2009.04689