Principles, Measurements and Suppressions of Semiconductor Laser Noise—A Review

Peng, Jiwang; Yu, Haiyang; Liu, Jianguo; Cao, Yulian; Zhang, Zhike; Sun, Liuli

doi:10.1109/jqe.2021.3093885

Cited by 4 publications

(1 citation statement)

References 107 publications

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“…Indeed, inspection of the temporal singular vectors associated with elevated singular values reveals the presence of mode hopping (when dual-stage optical isolation is not used) and beat notes (when using a laser output power of 120 mW). It may also be that when pumping the laser at its maximum rated output power, phenomena such as increased spontaneous emission and technical noise (e.g., vibrations of the laser resonator, excess noise from the pump source, or temperature fluctuations) contribute noise to the measured data [ 41 ]. However, we use spatiotemporal filtering as a validation tool, rather than a final solution to implement in our signal processing pipeline, and therefore the precise identification of the sources of noise that spatiotemporal filtering removes is not imperative.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Performance optimisation of a holographic Fourier domain diffuse correlation spectroscopy instrument

James

Powell

Munro

2022

Biomed. Opt. Express

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We have previously demonstrated a novel interferometric multispeckle Fourier domain diffuse correlation spectroscopy system that makes use of holographic camera-based detection, and which is capable of making in vivo pulsatile flow measurements. In this work, we report on a systematic characterisation of the signal-to-noise ratio performance of our system. This includes demonstration and elimination of laser mode hopping, and correction for the instrument’s modulation transfer function to ensure faithful reconstruction of measured intensity profiles. We also demonstrate a singular value decomposition approach to ensure that spatiotemporally correlated experimental noise sources do not limit optimal signal-to-noise ratio performance. Finally, we present a novel multispeckle denoising algorithm that allows our instrument to achieve a signal-to-noise ratio gain that is equal to the square root of the number of detected speckles, whilst detecting up to ∼1290 speckles in parallel. The signal-to-noise ratio gain of 36 that we report is a significant step toward mitigating the trade-off that exists between signal-to-noise ratio and imaging depth in diffuse correlation spectroscopy.

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Section: Experiments and Resultsmentioning

confidence: 99%

Performance optimisation of a holographic Fourier domain diffuse correlation spectroscopy instrument

James

Powell

Munro

2022

Biomed. Opt. Express

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Spectral Purity Improvement in Flickering Self-Injection Locked Lasers

Savchenkov

Lopez

Solomatine

et al. 2022

IEEE J. Quantum Electron.

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Intensity noise reduction in quantum dot comb laser by lower external carrier fluctuations

Wang,

Ding,

Wang

et al. 2024

Opt. Lett.

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This work investigates the impact of carrier noise induced by an external current source on the linewidth enhancement factor (LEF) and relative intensity noise (RIN) of a 100 GHz quantum dot fourth-order colliding-pulse mode-locked laser (MLL), driven by a normal pump with Gaussian-distributed carrier sequences and a quiet pump with sub-Poissonian-distributed carrier sequences. The results indicate that under a normal pump, the LEFs are approximately zero for reverse saturable absorber (SA) bias voltages ranging from 0 to 2.5 V, and the laser achieves a RIN as low as −156 dB/Hz. When using a quiet pump, both the LEF and RIN are reduced across all SA bias conditions, particularly at low reverse SA bias voltages. Specifically, the LEF decreases by up to 0.58 at 0 V, and the average RIN spectrum is reduced by more than 3 dB at the same voltage. This work provides a straightforward approach for the development and optimization of multi-channel light sources for dense wavelength division multiplexing (DWDM) technologies with low optical noise.

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Principles, Measurements and Suppressions of Semiconductor Laser Noise—A Review

Cited by 4 publications

References 107 publications

Performance optimisation of a holographic Fourier domain diffuse correlation spectroscopy instrument

Performance optimisation of a holographic Fourier domain diffuse correlation spectroscopy instrument

Spectral Purity Improvement in Flickering Self-Injection Locked Lasers

Intensity noise reduction in quantum dot comb laser by lower external carrier fluctuations

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