High optical feedback tolerance of InAs/GaAs quantum dot lasers on germanium

Zhou, Yue-Guang; Zhao, Xuyi; Cao, Chunfang; Gong, Qihuang; Wang, Cheng

doi:10.1364/oe.26.028131

Cited by 16 publications

(8 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whereas the carriers injected electrically to produce population inversion and gain can also recombine by radiative or Shockley-Read (defect-assisted) processes, the multi-carrier Auger mechanism tends to dominate at high carrier concentrations, so long as the operating temperature is high enough to overcome the activation energy associated with the energy gap. Auger recombination can also affect the laser damping factor, optical feedback dynamics [9], and dark current in mid-IR photodetectors, although it is less likely to dominate in detectors since they typically operate at very low optical excitation levels, and often at cryogenic temperatures to maximize the detection sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Auger Coefficients in Type I and Type II Quantum Well Midwave Infrared Lasers

Meyer

Canedy

Kim

et al. 2021

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

We perform a detailed comparison of 2D Auger coefficients in narrow-gap type-I and type-II quantum wells (T1QWs and T2QWs), and the relative effects of Auger nonradiative decay on midwave infrared lasers employing both types of gain media. Comparison is also made to 3D Auger coefficients in bulk mid-IR materials, by defining a "normalization length" that accounts for the spatial extent of the electron and hole wavefunctions in the quantum wells. The comparisons confirm that Auger recombination in both types of QW is substantially suppressed relative to bulk, due primarily to the effects of compressive strain on the valence band dispersions. We find that the 2D Auger coefficients in T1QWs remain substantially lower than those in T2QWs out to wavelengths beyond 3.5 µm. However, this does not necessarily imply a lower lasing threshold because a substantial fraction of the holes injected into T1QWs occupy lower subbands that do not contribute gain, so more must be injected to reach the lasing threshold. When all of the relevant considerations are combined, the thresholds for the best T1QW and T2QW lasers cross over near λ ≈ 3.0 µm. Other characteristics governing the relative T1QW and T2QW laser performances above threshold, such as maximum output power and wallplug efficiency, are also considered.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of Auger Coefficients in Type I and Type II Quantum Well Midwave Infrared Lasers

Meyer

Canedy

Kim

et al. 2021

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

show abstract

“…The strong damping effect also leads to the absence of the resonance peak in the relative intensity noise of ICLs, which prevents the observation and the extraction of the RO frequency in our previous work 67 . Consequently, ICLs resemble quantum-dot lasers, where the ROs are usually overdamped as well 71 , 72 . When the optical feedback with a feedback ratio of −12.7 dB is applied to the ICL, a small peak appears around 168 MHz, which determines the oscillation period of the corresponding time trace in Fig.…”

Section: Resultsmentioning

confidence: 99%

Mid-infrared hyperchaos of interband cascade lasers

et al. 2022

Self Cite

View full text Add to dashboard Cite

Chaos in nonlinear dynamical systems is featured with irregular appearance and with high sensitivity to initial conditions. Near-infrared light chaos based on semiconductor lasers has been extensively studied and has enabled various applications. Here, we report a fully-developed hyperchaos in the mid-infrared regime, which is produced from interband cascade lasers subject to the external optical feedback. Lyapunov spectrum analysis demonstrates that the chaos exhibits three positive Lyapunov exponents. Particularly, the chaotic signal covers a broad frequency range up to the GHz level, which is two to three orders of magnitude broader than existed mid-infrared chaos solutions. The interband cascade lasers produce either periodic oscillations or low-frequency fluctuations before bifurcating to hyperchaos. This hyperchaos source is valuable for developing long-reach secure optical communication links and remote chaotic Lidar systems, taking advantage of the high-transmission windows of the atmosphere in the mid-infrared regime.

show abstract

“…24,36,37 In addition, the LBF also affects the optical feedback sensitivity, where a larger LBF more easily destabilizes the laser. 25,29,38,39 Therefore, we first study the LBF of the QCL operated above threshold, using the self-mixing interferometry technique. 40−42 This technique applies very weak optical feedback to the QCL, and the feedback phase is periodically modulated through slightly varying the feedback length using a piezoelectric transducer.…”

Section: ■ Measurement Resultsmentioning

confidence: 99%

Strong Optical Feedback Stabilized Quantum Cascade Laser

Zhao

Wang

2020

ACS Photonics

Self Cite

View full text Add to dashboard Cite

A narrow-line-width quantum cascade laser (QCL) is highly demanded for high-resolution spectroscopy of narrow molecule absorption lines. This work shows a low-noise QCL stabilized by strong optical feedback without any feedback phase control. Although optical feedback is usually detrimental to the stability of laser diodes, the QCL is highly stable against optical feedback. The stabilized QCL line width is proved to be insensitive to the feedback phase, as long as the feedback strength is strong enough. Therefore, fine control of feedback length on the subwavelength scale is not required, which significantly simplifies the experimental setup. Using this simple approach, we demonstrate that the QCL line width is narrowed from 7.6 MHz down to 107 kHz. Meanwhile, the frequency noise below 100 kHz Fourier frequency is reduced by about 40 dB.

show abstract

High optical feedback tolerance of InAs/GaAs quantum dot lasers on germanium

Cited by 16 publications

References 37 publications

Comparison of Auger Coefficients in Type I and Type II Quantum Well Midwave Infrared Lasers

Comparison of Auger Coefficients in Type I and Type II Quantum Well Midwave Infrared Lasers

Mid-infrared hyperchaos of interband cascade lasers

Strong Optical Feedback Stabilized Quantum Cascade Laser

Contact Info

Product

Resources

About