An external cavity diode laser is demonstrated using a Bragg grating written into a novel integrated optical fiber platform as the external cavity. The cavity is fabricated using flame-hydrolysis deposition to bond a photosensitive fiber to a silica-on-silicon wafer, and a grating written using direct UV-writing. The laser operates on a single mode at the acetylene P13 line (1532.83 nm) with 9 ...

In this letter, the characteristics of noise and long-term stability near- mid-infrared (near-IR mid-IR) gas-filled fiber Raman lasers have been investigated for first time. The results reveal that an increase in pulse energy is associated with a decrease noise, relative peak intensity (RIN) always lower than (REN). We also demonstrate drift power are directly linked high amount heat release du...

We describe the quantum-noise behavior of a laser that has nonorthogonal polarization modes. The nonorthogonality of the modes leads to excess quantum noise. Theoretically, we derive the excess noise dynamics of the laser, including the saturation of the gain medium. Experimentally, we have measured the noise dynamics in the polarization, intensity and phase degrees of freedom of a 3.51-mm HeXe...

Cascaded Brillouin random fiber lasers (BRFLs) with laser linewidth compression were theoretically and experimentally demonstrated. Thanks to photon-phonon coupled interplay as well randomly distributed feedback along silica fibers, the coherent time of cascading BRFL radiation is significantly prolonged whilst phase noise further suppressed, albeit a quantum-noise-induced narrowing limit. To v...

Optical Coherence Tomography (OCT) uses the spatial and temporal coherence properties of optical waves backscattered from a tissue sample to form an image. An inherent characteristic of coherent imaging is the presence of speckle noise. In this study we use a new ensemble framework which is a combination of several Multi-Layer Perceptron (MLP) neural networks to denoise OCT images. The noise is...

Demodulation of intensity noise in the optical heterodyne detector is analyzed for application in interferometric gravitational-wave detectors. The correlation function and the power spectral density of the demodulated intensity noise are derived, taking into account the effect of bandpass filtering at the photodiode and an arbitrary demodulation waveform. The analysis includes demodulation of ...

A coupled map lattice of generalized Lotka-Volterra equations in the presence of colored multiplicative noise is used to analyze the spatiotemporal evolution of three interacting species: one predator and two preys symmetrically competing each other. The correlation of the species concentration over the grid as a function of time and of the noise intensity is investigated. The presence of noise...

The entrainment dynamics of two chemical-oscillators in an excitable medium separated by some distance d was experimentally studied in the light-sensitive BelousovZhabotinsky reaction under application of external noise. Two chemical-oscillators were always spontaneously synchronized at sufficiently small d or frequency difference in the absence of noise. For insufficient distance to entrain ea...