Ultra-wide and nearly flat-top gain spectrum in asymmetric quantum-well structure for InGaAs tunable lasers

Q.-N. Yu; X. Li; M. Zheng; W. Lu; X. Zhang; J. Wu

doi:10.1117/12.2505115

15 November 2018 Ultra-wide and nearly flat-top gain spectrum in asymmetric quantum-well structure for InGaAs tunable lasers

Q.-N. Yu, X. Li, M. Zheng, W. Lu, X. Zhang, J. Wu

Author Affiliations +

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 1096418 (2018) https://doi.org/10.1117/12.2505115
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

For tunable quantum well lasers, it has been a huge challenge all along how to achieve an ultra-wide tuning spectrum far exceeding the full width at half maximum (FWHM) of gain in a classic quantum well and the uniform power output for all tunable wavelengths of the laser under a fixed injection power, especially based on a single well structure. In this paper, we are reporting some amazing results from a special asymmetrical InGaAs quantum well structure, with which both incredibly extremely-wide and nearly uniform gain spectra are obtained with a fixed injection power. The excellent gain characteristics may make above dream come ture for the InGaAs-based tunable lasers. The formation of the structure is associated with the Indium-rich island effect. The analysis showed that the spectrally-tunable range from this special well structure could be up to 6 times as broad as the FWHM of gain in the classic InGaAs well and the gain spectrum with quasi-rectangular feature in transverse electric mode was obtained as well. It enables nearly identical power output over the total spectrally tunable range of the laser to be realized with a fixed optical injection power.

Citation Download Citation

Q.-N. Yu, X. Li, M. Zheng, W. Lu, X. Zhang, and J. Wu "Ultra-wide and nearly flat-top gain spectrum in asymmetric quantum-well structure for InGaAs tunable lasers", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 1096418 (15 November 2018); https://doi.org/10.1117/12.2505115

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