Results 131 to 140 of about 5,269,631 (254)

Coherent microwave comb generation via the Josephson effect

Nature Communications
Frequency combs represent exceptionally precise measurement tools due to the coherence of their spectral lines. While optical frequency comb sources constitute a well-established technology, superconducting circuits provide a relatively unexplored on ...
Angelo Greco, Xavier Ballu, Francesco Giazotto, Alessandro Crippa   +3 more
doaj   +1 more source

Bounded Frequency Lattices in Coupled Lithium Niobate Ring Cavities

Laser &Photonics Reviews, EarlyView.
We leverage coupled asymmetric ring resonators in realizing bounded tight‐binding frequency lattices and demonstrate their discrete band structures on an integrated device. Suppression of long‐range coupling with a single auxiliary cavity is demonstrated by combining mode splitting and coupled waveguide dispersion effects.
Hiep Xuan Dinh, Armandas Balčytis, Guanghui Ren, Mei Xian Low, Arnan Mitchell, Thach G. Nguyen   +5 more
wiley   +1 more source

Frequency comb-linked mid-infrared continuous-wave optical parametric oscillator

, 2014
We report on a frequency comb-referenced mid-infrared continuous-wave optical parametric oscillator. The frequency of the mid-infrared idler beam is locked to a near-infrared frequency comb after frequency doubling the idler ...
Merimaa, Mikko, Halonen, L., M. Merimaa, L. Halonen, Fordell, Thomas, T. Fordell, Vainio, M., Hieta, Tuomas, J. Peltola, Peltola, J., M. Vainio, T. Hieta   +11 more
core   +1 more source

Intensity Noise Dynamics in Terahertz Quantum Cascade Lasers

Laser &Photonics Reviews, EarlyView.
Intensity‐noise dynamics in terahertz quantum cascade lasers are investigated across single‐mode, dense‐comb and harmonic‐comb regimes using graphene thermoelectric detectors. Harmonic combs show ∼10% lower relative intensity noise, while RIN scales as P0−γ$P_0^{ - \gamma }$ with γ≈1.2$\gamma \approx 1.2$, revealing a crossover from spontaneous ...
M. Alejandro Justo‐Guerrero, Leonardo Viti, Vladimir Pushkarev, Lianhe Li, Edmund H. Linfield, Miriam S. Vitiello   +5 more
wiley   +1 more source

Characterization and Repetition Rate Locking of a 1 GHz Erbium‐Doped ZBLAN Waveguide‐Chip Comb Laser

Laser &Photonics Reviews, EarlyView.
A compact, erbium‐doped ZBLAN waveguide chip mode‐locked laser that self‐starts, delivers stable ultrashort pulses, and repetition rate locked to a 1 GHz radio‐frequency reference. The laser produces near transform‐limited 324 fs pulses and 12 nm bandwidth with low noise and long‐term stability, with potential applications in optical frequency ...
Wen Qi Zhang, Nicolas Bourbeau Hébert, Dale E. Otten, Colin Hall, David G. Lancaster   +4 more
wiley   +1 more source

Optical intensity square root differentiator based on an integrated Kerr frequency comb source

, 2017
We propose and experimentally demonstrate an optical intensity square root differentiator based on an integrated comb source. The proposed differentiator features full reconfigurablity and compact structure.
Sai T. Chu, Brent E. Little, Moss, David J. (dmoss@swin.edu.au), Shoeiby, Mehrdad, Jiayang Wu, David J. Moss, Wu, Jiayang, Xingyuan Xu, Little, Brent E., Thach G. Nguyen, Roberto Morandotti, Nguyen, Thach G., Mitchell, Arnan, Morandotti, Roberto, Mehrdad Shoeiby, Xu, Xingyuan, Chu, Sai T., Moss, David J., Arnan Mitchell   +18 more
core   +1 more source

Reconfigurable Geometric Phase Matching by Multilayered Nonlinear Thin‐Film Crystals

Laser &Photonics Reviews, EarlyView.
The concept of geometric phase matching is demonstrated as a dynamically reconfigurable approach for tunable nonlinear wave mixing in multilayered nonlinear thin‐film crystals. Experimental results reveal full modulation in a bilayer structure and near‐perfect spin‐selective phase matching of second‐harmonic generation in an eight‐layer configuration ...
Danielle Ben‐Haim, Mai Tal, Xiaoxi Xu, Tal Ellenbogen   +3 more
wiley   +1 more source

Plasmon–Exciton Coupling Enhances Second‐Order Nonlinear Response in Borophene–ZnO Hybrid Structures

Laser &Photonics Reviews, EarlyView.
Nonlinear interactions between plasmons in borophene and excitons in ZnO lead to enhanced nonlinear and incoherent cathodoluminescence, as well as coherent second harmonic generation, under electron‐beam and laser irradiations, respectively. The anisotropic response of borophene, revealed as in‐plane hyperbolic polariton propagation, acts as a control ...
Maximilian Black, Yaser Abdi, Prabhdeep Singh, Bharti Garg, Zahra Alavi, Mohammadreza Alikhanim, Mohammad Hosein Salemi Seresht, Fatemeh Chahshouri, Masoud Taleb, Nahid Talebi   +9 more
wiley   +1 more source

Reconfigurable broadband microwave photonic intensity differentiator based on an integrated optical frequency comb source

, 2017
We propose and experimentally demonstrate a microwave photonic intensity differentiator based on a Kerr optical comb generated by a compact integrated micro-ring resonator (MRR).
Sai T. Chu, Brent E. Little, Moss, David J. (dmoss@swin.edu.au), Shoeiby, Mehrdad, Jiayang Wu, David J. Moss, Xingyuan Xu, Wu, Jiayang, Thach G. Nguyen, Roberto Morandotti, Little, Brent E., Nguyen, Thach G., Mitchell, Arnan, Morandotti, Roberto, Mehrdad Shoeiby, Xu, Xingyuan, Chu, Sai T., Moss, David J., Arnan Mitchell   +18 more
core   +1 more source

Chip Scale Emission of Blue Light at Elevated Temperatures in Optical Waveguides Integrated With Rubidium Vapor

Laser &Photonics Reviews, EarlyView.
An integrated atom‐clad waveguide enables chip‐scale blue light generation (420 nm) via a two‐photon ladder transition in rubidium vapor at temperatures up to 240°C. The observed bell‐shaped intensity profile reveals a competitive interplay between local photon generation and macroscopic vapor reabsorption.
Arieh Grosman, Ilan Sher, Roy Zektzer, Noa Mazurski, Uriel Levy   +4 more
wiley   +1 more source