EFFECT OF PERIODICALLY MODULATED NOISE ON STOCHASTIC RESONANCE IN LASER SYSTEM

The output power and the signal-to-noise ratio (SNR) of a single-mode laser system are calculated in the case of the laser model with periodically modulated noise. The corresponding stochastic resonance (SR) phenomena are discussed and compared with the case without periodically modulated noise. It is shown that the main difference between the two noise laser models exists in the SNR as a function of signal period. There appears resonance and suppression coexisting phenomenon for the model with periodically modulated noise, which can be utilized to restrain or optimize the output SNR of the system. Whereas, SR is absent for the model without periodically modulated noise, and the SNR just increases monotonously with signal period.

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Stochastic Resonance in a Single-Mode Laser System with an Input Pulse Signal

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.552.377 ◽

2013 ◽

Vol 552 ◽

pp. 377-383

Author(s):

Li Zhang ◽

Xiu Hua Yuan

Keyword(s):

Stochastic Resonance ◽

Quantum Noise ◽

Signal To Noise Ratio ◽

Laser System ◽

Input Pulse ◽

Pulse Signal ◽

Single Mode ◽

Single Mode Laser ◽

Correlation Strength ◽

Output Snr

In this paper, we investigated the stochastic resonance (SR) phenomenon in a laser system with correlated pump noise and quantum noise. The signal-to-noise ratio (SNR) is calculated when a square sine pulse signal is added to the system. The effects of the duty cycle of pulse signal and the correlation strength of noises on the SNR are discussed. Some valuable phenomena are investigated to improve the output SNR of laser.

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Stochastic Resonance and Simulation of a Single-mode Laser System with Periodically Modulated Signal

2018 4th International Conference on Education, Management and Information Technology (ICEMIT 2018) ◽

10.25236/icemit.2018.315 ◽

2018 ◽

Keyword(s):

Stochastic Resonance ◽

Laser System ◽

Single Mode ◽

Mode Laser ◽

Single Mode Laser

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The Effects of Sine-Squared Pulse Modulation Correlated Noises on Stochastic Resonance in Single-Mode Laser

Zeitschrift für Naturforschung A ◽

10.1515/zna-2011-6-705 ◽

2011 ◽

Vol 66 (6-7) ◽

pp. 411-416

Author(s):

Zhi-Yun Wang ◽

Pei-Jie Chen ◽

Liang-Ying Zhang

Keyword(s):

Stochastic Resonance ◽

Quantum Noise ◽

Signal To Noise Ratio ◽

Single Mode ◽

Correlated Noise ◽

Output Intensity ◽

Pulse Modulation ◽

Mode Laser ◽

Single Mode Laser ◽

Correlated Noises

By means of the linear approximation method, the output intensity power and signal-to-noise ratio (SNR) of a single-mode laser driven by sine-squared pulse modulation correlated noise are calculated. The effects of amplitude B, period T, and width t on the resonance curves of SNR to the pump noise intensities and quantum noise intensities of pulse are discussed, and it is found that the SNR shows a stochastic resonance with the varying of pulse width τ

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STOCHASTIC RESONANCE IN A SINGLE-MODE LASER DRIVEN BY QUADRATIC COLORED PUMP NOISE AND QUANTUM NOISE WITH CROSS-CORRELATION BETWEEN REAL AND IMAGINARY PARTS OF NOISE

International Journal of Modern Physics B ◽

10.1142/s021797920905300x ◽

2009 ◽

Vol 23 (22) ◽

pp. 4665-4674

Author(s):

DE-SHENG XU ◽

LI CAO ◽

DA-JIN WU

Keyword(s):

Stochastic Resonance ◽

Cross Correlation ◽

Quantum Noise ◽

Signal To Noise Ratio ◽

Single Mode ◽

Noise Model ◽

Signal Frequency ◽

Mode Laser ◽

Single Mode Laser ◽

Modern Physics

Based on the single-mode laser noise model driven by quadratic colored pump noise and quantum noise with cross-correlation between real and imaginary parts of noise proposed in International Journal of Modern Physics B20, 5383 (2006) and Phys. Rev. E 73, 023802 (2006), the stochastic resonance (SR) of laser intensity is investigated by virtue of the linearized approximation. The analytic expression of signal-to-noise ratio (SNR) is calculated. It is found that the phenomena of stochastic resonance respectively exist in the curves of the SNR versus the noise cross-correlation coefficient λp and the SNR versus the pump parameter a, as well as the SNR versus the signal frequency [Formula: see text] for the model. It is shown that there are three different types of SR in the model: the conventional form of SR, the SR in the broad sense and the bona fide SR.

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