We report a simple technique to suppress high-frequency phase noise of a Yb-based fiber optical frequency comb using an active intensity noise servo. Out-of-loop measurements of the phase noise using an optical heterodyne beat with a cw laser show suppression of phase noise by ≥7 dB out to Fourier frequencies of 100 kHz with a unity-gain crossing of ∼700 kHz. These results are enabled by the st...

acoustic experimental data of irib (islamic republic of iran broadcasting) server room was taken to measure the acoustic noise characteristics of frequency and sound pressure level (spl). the purposes of this paper are measuring the noise pollution and its evaluation through the regulations. the measurements were taken in two stages. the first one was taken at 10 points by sound investigator 22...

We describe a method of simultaneusly tracking noise and speech levels for signal-to-noise ratio adaptive speech endpoint detection. The method is based on the Kalman filter framework with switching observations and uses a dynamic distribution that 1) limits the rate of change of these levels 2) enforces a range on the values for the two levels and 3) enforces a ratio between the noise and the ...

We present preliminary results connrming the importance of radiometric correction in multicamera applications. Although, in this paper we compensate for systematic noise only, we review all noise sources in the video sensor (systematic and random). We use a simple model for radiometric correction of digital images. The correction procedure is tested on the disparity map computation in stereo ma...

The self-spiking behavior of an integrated saturable absorber and gain section laser fabricated in InP technology platform is analyzed. gain, intensity dynamics are first inspected using the normalized Yamada model. This model shows excitable as well relative refractory period, both which also present biological neurons. Measurements a two-section show irregular spike generation on millisecond ...

The fidelity of gate operations on neutral atom qubits is often limited by fluctuations the laser drive. Here, we quantify sensitivity quantum fidelities to phase and intensity noise. We first develop models identify features observed in self-heterodyne noise spectra, focusing effects white servo bumps. In weak-noise regime, characteristic well-stabilized lasers, show that an analytical theory ...

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...