Polarization-stabilized tunable VCSEL with internal-cavity sub-wavelength grating

Wang, Xiaolong; Zou, Yanbiao; Shi, Linlin; Xu, Yang; Jin, Liang; Hao, Yongqiang; He, Zhu; Gong, Chunyang; Ma, Xiang; Liu, Guojun

doi:10.1364/oe.27.035499

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…It leads to a thermal mismatch between both so that the effective gain available by the cavity mode is sharply reduced when the device temperature is changed. As a result, the threshold carrier density of the device rises and the conversion efficiency drops, accordingly. − Therefore, the performance of a single-frequency laser diode is associated with not only thermal carrier-leakage loss over barriers of the quantum structure but also the extra thermal gain–cavity detuning effect. This problem does not exist for other types of laser diodes.…”

Section: Introductionmentioning

confidence: 99%

Removing Thermal Gain–Cavity Detuning Effect Based on Supergain Quantum Well–Wire Hybrid Nanostructures for Single-Frequency Laser Diodes

Tai,

Wang,

Duan

et al. 2024

ACS Appl. Nano Mater.

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It is well-known that thermal detuning between the gain peak and the cavity mode always occurs and leads to considerable gain loss in single-frequency laser diodes. For this issue, scientists have not found an effective solution so far. In this article, we propose an approach to addressing this problem effectively. It is associated with a fundamental change of the quantum structure to acquire a supergain spectrum (i.e., both wide and uniform gain distribution) by means of the self-assembled quantum well−wire hybrid nanostructure. With the supergain spectrum, the cavity mode can constantly obtain the max gain over a wide temperature range with a very small gain fluctuation of <4 cm −1 . The simulation of an InGaAs vertical-cavity surface-emitting laser (VCSEL) model shows that the effective gain that the cavity mode can obtain is increased by >202% and the threshold pump power is reduced by >38.9% accordingly when the device temperature is higher than 360 K, in comparison to the performance of a pure quantum well. Therefore, this demonstrates great superiority for removing the gain−cavity detuning effect and improving the high-temperature performance of single-frequency laser diodes.

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Section: Introductionmentioning

confidence: 99%

Removing Thermal Gain–Cavity Detuning Effect Based on Supergain Quantum Well–Wire Hybrid Nanostructures for Single-Frequency Laser Diodes

Tai,

Wang,

Duan

et al. 2024

ACS Appl. Nano Mater.

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Control of polarization switching in a VCSEL via resonant feedback from a whispering-gallery-mode cavity

et al. 2022

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We report a method for flexibly switching the dominant polarization of a vertical-cavity surface-emitting laser (VCSEL) by introducing polarization-resolved resonant optical feedback from a whispering-gallery-mode (WGM) cavity to the lasing cavity. Switching between the originally dominant mode and a side mode is experimentally demonstrated under different bias currents once one of them is locked to the resonance mode of the WGM cavity. In addition to a controllable polarization state, the reported VCSEL also demonstrates a linewidth as narrow as tens of kilohertz, which is highly desirable for many applications, including high-speed data communication, light detection and ranging (lidar), and absorption spectroscopy.

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Polarization-stabilized tunable VCSEL with internal-cavity sub-wavelength grating

Cited by 2 publications

References 37 publications

Removing Thermal Gain–Cavity Detuning Effect Based on Supergain Quantum Well–Wire Hybrid Nanostructures for Single-Frequency Laser Diodes

Removing Thermal Gain–Cavity Detuning Effect Based on Supergain Quantum Well–Wire Hybrid Nanostructures for Single-Frequency Laser Diodes

Control of polarization switching in a VCSEL via resonant feedback from a whispering-gallery-mode cavity

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