Effects of quantum noise on the nonlinear dynamics of a semiconductor laser subject to two spectrally filtered, time-delayed optical feedbacks

Suelzer, Joseph S.; Prasad, Awadhesh; Ghosh, R.; Vemuri, Gautam

doi:10.1016/j.optcom.2016.03.017

Cited by 5 publications

(3 citation statements)

References 27 publications

(24 reference statements)

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“…[29][30][31], which confirms our new results and expectations. From the results, under OFB in the weak region and when the LD is operating in the CW or PO region, we found that although the decrease/increase in the LEF/SEF causes an enhancement/reduction in the laser stability/noise, as presented in Figure 5, it causes considerable shifts in the lasing frequency and corrupts the LD efficiency in applications [32].…”

Section: Discussionmentioning

confidence: 88%

“…[2 which confirms our new results and expectations. From the results, under OFB weak region and when the LD is operating in the CW or PO region, we found th hough the decrease/increase in the LEF/SEF causes an enhancement/reduction in t ser stability/noise, as presented in Figure 5, it causes considerable shifts in the frequency and corrupts the LD efficiency in applications [32]. By transmitting to the PO state, when the LEF α = 1 and the SEF C = 10 −4 , 10 −5 , and 10 −6 , the peak value of the RIN with OFB is enhanced to higher values (four orders of magnitude) (dashed line) compared with the solitary laser RIN (solid line) at the relaxation frequency f r , as shown in Figure 4(a1-a3).…”

Section: Rin Spectra Of Ld For Various Statesmentioning

confidence: 94%

“…He found that increasing the SEF and reducing the threshold current level gives low noise and a narrow linewidth when operating a micro-cavity laser at low power levels [30]. Many papers have studied the impacts of the SEF on the modulation and linewidth of the laser [31][32][33][34]. However, a thorough investigation of the influences of the SEF and LEF on the dynamic states and RIN in the presence of OFB is still missing.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of Semiconductor Laser Subject to Optical Feedback with Linewidth Enhancement Factor and Spontaneous Emission Factor

Abdulrhmann,

Hakami

2023

Applied Sciences

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In this article, the dependence of the operation states, dynamics, and noise of laser diodes (LD) with external optical feedback (OFB) on the linewidth enhancement factor (LEF) and spontaneous emission factor (SEF) have been investigated. We systematically studied the classification of the laser dynamics based on the bifurcation diagrams (BDs) of the photon numbers and the relative intensity noise (RIN) spectra at different levels of OFB, LEF, and SEF. The simulation results show that variations in the LEF and SEF lead to significant changes in the laser operation states and dynamics, which vary from continuous wave (CW), pulsation, and chaos states. The Hopf bifurcation (HB) point moves toward increasing/decreasing OFB intensity by increasing/decreasing the SEF/LEF. The laser state becomes more stable through a wide range of OFB by increasing/decreasing the SEF/LEF. The RIN reduces the solitary laser noise level at higher/lower values of SEF/LEF when the laser is operated under OFB. The relaxation frequency of the laser shifts toward higher values by increasing/decreasing the SEF/LEF through most laser states, and the RIN peak is higher than solitary laser noise by four orders of magnitude, especially in the pulsation regions. In the low-frequency region, the RIN is enhanced from one to two orders by reducing the LEF and SEF through laser states.

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Section: Discussionmentioning

confidence: 88%

Section: Rin Spectra Of Ld For Various Statesmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Dynamics of Semiconductor Laser Subject to Optical Feedback with Linewidth Enhancement Factor and Spontaneous Emission Factor

Abdulrhmann,

Hakami

2023

Applied Sciences

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Quantum scissor from exact generalized photon number statistics

Batin,

Ghosh,

Panigrahi

et al. 2024

Sci Rep

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We report the close form expressions of the photon number statistics for a generalized coherent state and a generalized photon-added coherent state, which are shown to be crucial for proposing a variety of quantum scissor operations. The analytically obtained distributions are also capable of predicting the precise laser intensity windows for realizing a variety of quantum scissors. Truncating a photon added state overcomes the selection rule of obtaining the lower order Fock states. Photon addition also enables us to obtain a higher order Fock state in a lower order superposition. The importance of circular geometry is also demonstrated for engineering such quantum scissors.

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