Intensity noise in 1.5[micro sign]m GaInAs quantum well buried heterostructure lasers

Westbrook, L.D.; Fletcher, Nicholas C.; Cooper, D.M.; Stevenson, Matthew; Spurdens, P.C.

doi:10.1049/el:19890793

Cited by 29 publications

(6 citation statements)

References 2 publications

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“…The inability to determine damping factors at higher optical powers (due to thermal degradation) prevented the calculation of a K factor from the slope of a y versusf; plot. Nevertheless, these damping factors are much smaller at the same resonance frequency than those reported for either InGaAsP bulk lasers [28] or strained InGaAs quantum-well lasers [33], [34].…”

Section: Microwave Modulation Responsementioning

confidence: 66%

Strained-layer InGaAs-GaAs-AlGaAs lasers grown by molecular beam epitaxy for high-speed modulation

Offsey

Schaff

Lester

et al. 1991

IEEE J. Quantum Electron.

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Section: Microwave Modulation Responsementioning

confidence: 66%

Strained-layer InGaAs-GaAs-AlGaAs lasers grown by molecular beam epitaxy for high-speed modulation

Offsey

Schaff

Lester

et al. 1991

IEEE J. Quantum Electron.

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italicRIN ((), f) \propto \frac{(f^{2} + {((), γ / 2 π)}^{2})}{((), f_{r}^{2} - f^{2}) + f^{2} {(γ / 2 π)}^{2}} .

…”

Section: Resultsmentioning

confidence: 99%

“…The relaxation oscillation frequency f r and the damping coefficient γ can be extracted by measuring the relative intensity noise (RIN) spectra. The relative intensity noise can be described by the expression 13,14,21 RIN f ð Þ / DML to obtain a higher bandwidth. Shortening cavity length further is promising to enhance f r .…”

Section: Dynamic Characteristicsmentioning

confidence: 99%

Coplanar electrode directly modulated lasers with different cavity length

Sun

Xia

et al. 2021

Micro & Optical Tech Letters

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A ridge-waveguide (RW) directly modulated laser (DML) with a coplanar electrode structure is proposed and measured in this paper. Since utilizing the coplanar electrode can significantly reduce parasitic capacitance, the frequency responses of DMLs exhibit a quite low roll-off. Shortening the cavity length L is attractive to enhance the high-speed performance of DMLs, but it will increase the mirror loss and the chip resistance at the same time. We analyzed the static and dynamic characteristics of 200-μm, 250-μm, and 300-μm lasers experimentally and theoretically to investigate the impact of L on the coplanar-electrode DML. Shortening the cavity length can improve the relaxation oscillation frequency f r effectively. The 200-μm DML achieves a bandwidth of 15.3 GHz. The f r is the most important limiting factor for the laser to obtain a wide bandwidth. Decreasing L and increasing the differential gain are promising for the further improvement of f r . However, shortening L causes a more severe thermal effect and the deterioration of the linearity. This trade-off must be considered in the future study.

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“…a) Relative intensity noise spectra of the free running laser measured at different pump currents given in the legend, with an noise-equivalent power of 27 pW/ √ Hz. The RIN spectra were fitted according to the routine introduced in [60] to extract the relaxation oscillation frequency at each pump current. b) The experimentally determined relaxation oscillations are indicated by blue dots, the red line shows the evolution of the relaxation oscillation frequency with increasing pump current J (normalized to the lasing threshold J th ) obtained by implementing the model ( 1)-( 2) into DDE-biftool.…”

Section: Theoretical Modelmentioning

confidence: 99%

Feedback induced locking in semiconductor lasers with strong amplitude-phase coupling

Hausen,

Herzog,

Nelde

et al. 2021

Preprint

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The influence of optical feedback on semiconductor lasers has been a widely studied field of research due to fundamental interests as well as the optimization of optical data transmission and computing. Recent publications have shown that it is possible to induce a periodic pulsed like output in quantum-dot and quantum-well laser diodes utilizing the locking of the external cavity modes and the relaxation oscillation frequency. We present an in-depth analysis of this effect. We choose submonolayer quantum dots as a gain system, as these provide a relatively strong amplitude-phase coupling, which has proven to be very beneficial for these locking effects to occur. Introducing a new theoretical model we can correctly reproduce the essential features of the gain system and validate them by comparison to our experimental results. From this starting point we can further explore how the staircase behaviour of the oscillation frequency with increasing pump current can be influenced by changing various laser parameters. The staircase behavior is induced by a reordering of the Hopf bifurcations giving birth to the regular pulsed-like oscillations.

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Intensity noise in 1.5[micro sign]m GaInAs quantum well buried heterostructure lasers

Cited by 29 publications

References 2 publications

Strained-layer InGaAs-GaAs-AlGaAs lasers grown by molecular beam epitaxy for high-speed modulation

Strained-layer InGaAs-GaAs-AlGaAs lasers grown by molecular beam epitaxy for high-speed modulation

Coplanar electrode directly modulated lasers with different cavity length

Feedback induced locking in semiconductor lasers with strong amplitude-phase coupling

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