Detuned Grating Single-Mode Laser With High Immunity to External Optical Feedback

Pan, Yue; Xi, Yanping; Li, Xun

doi:10.1109/jphot.2015.2497581

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…When the PSG is fabricated within the laser cavity, the residual reflection of PSG is not expected since it will cause serious oscillation of output power. Gratings with a tilted angle can help to reduce the reflection [18], [19], so we introduce a small tilted angle into the PSG. The tilted angle of waveguide gratings is an important factor in determining the grating coupling coefficient [20].…”

Section: Principles and Design Of The Cascaded Gratingsmentioning

confidence: 99%

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

Zhu

Feng

et al. 2018

IEEE Photonics J.

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In this paper, a novel tunable DBR laser based on novel cascaded gratings is proposed for chirp management in high-speed direct modulation applications. The cascaded gratings, i.e., a tilted π phase-shift grating followed by a normal uniform Bragg grating, can provide a narrow-band reflection spectrum with a sharp falling slope on the longer wavelength side, so that the optical spectrum shaping and the detuned-loading effects can be enhanced. Simulation results indicate that the wavelength tuning range of the laser is about 10 nm and the 3-dB modulation bandwidth reaches up to 25 GHz. By simply adjusting the phase current and thus changing the detuned frequency, the extinction ratio and the frequency chirp can be optimized, which is helpful to improve the dispersion tolerance and reduce the dispersion power penalty.

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Section: Principles and Design Of The Cascaded Gratingsmentioning

confidence: 99%

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

Zhu

Feng

et al. 2018

IEEE Photonics J.

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“…SLs belong to class B lasers, which can exhibit complex nonlinear behaviors with additional degrees of freedom at room temperature [20][21][22][23], including steady state, period, period doubling, and chaos, etc. Common methods of introducing external perturbations in SL include external optical feedback [24,25], external optical injection [26,27], optoelectronic feedback [28,29], and frequency-selective feedback [30].…”

Section: Introductionmentioning

confidence: 99%

High-quality random bit generation based on a cascade-coupled nano-laser system

Liu,

Mu,

Guo

et al. 2024

Laser Phys. Lett.

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In this paper, a novel method is proposed to generate high-quality chaotic signals using three cascade-coupled nano-lasers (NLs), and generate high-speed, high-quality random number sequences. The master NL (MNL) is subjected to optical feedback, and its output is injected into the intermediate NL (INL), which is further injected into the slave NL (SNL). In the simulation, we first adjust proper parameters so that the SNL generates a chaotic signal with a large bandwidth and time-delay signature concealment. After performing self-delayed differential processing on the chaotic signal, and utilizing an 8-bit analog-to-digital converter for sampling and quantization, followed by extraction of the m-bits least significant bit, the final random bit sequence is obtained. Finally, we use NIST SP 800-22 to test the generated random numbers. The results demonstrate that the obtained random number sequence successfully passed all tests specified by NIST SP 800-22.

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“…With the introduction of external perturbations, they can exhibit complex dynamic [1,2], including steady state, period, period doubling, and chaos, etc. Common methods of introducing external perturbations in SL include external optical feedback [3][4][5][6][7], external optical injection [8][9][10], mutual injection [11,12], optoelectronic feedback [13][14][15], and frequency-selective feedback [16][17][18]. * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Research on secure communication technology based on phase conjugate feedback chaotic injection system

Fu,

2024

J. Opt.

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This paper outlines an experimental plan for generating phase conjugated light, and it has successfully implemented a phase conjugate feedback semiconductor laser(PCF-SL) chaos system based on the four-wave mixing(FWM) principle using the established fiber-optic experimental platform, which is capable of producing high-dimensional chaotic signals. Building upon this foundation, we also propose a laser chaotic two-channel secure communication scheme utilizing PCF as its foundation, and analyze its time delay concealment mechanism and synchronization characteristics. The effects of parameter mismatch and injection strength on synchronization performance and communication quality are also considered in the paper. Our experimental results show that by adjusting the injection strength and frequency detuning parameters, the system can produce signals without obvious time delay signature (TDS), thereby achieving high-quality and high-security secure communications.

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Detuned Grating Single-Mode Laser With High Immunity to External Optical Feedback

Cited by 4 publications

References 19 publications

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

High-quality random bit generation based on a cascade-coupled nano-laser system

Research on secure communication technology based on phase conjugate feedback chaotic injection system

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