Polarization-independent high contrast grating 1300 nm dot-in-a-well InAs quantum-dot VCSEL

Mahjoory, Ali; Maleki, mona; Baghban, Hamed; Sheikhey, MohammadMohsen

doi:10.1088/1402-4896/acd0df

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…It has been demonstrated that the threshold current density of per QD layer as low as 12.5A cm −2 [26], and the lasing temperature reached up to 220 °C [27]. In addition, QD materials emerges to be potentially better gain medium because QD lasers also have excellent properties of lower reflection sensitivity, wider gain bandwidth, and nearly zero linewidth enhancement factor [28][29][30]. The above advantages make QD lasers a particularly attractive light source in the fields such as high-performance data centers and hyperscale computing.…”

Section: Introductionmentioning

confidence: 99%

Design of high power evanescent quantum dot distributed feedback lasers on Si

Ge,

Wang,

Liu

et al. 2024

Phys. Scr.

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Great advancements in III–V/Si epitaxy have pushed quantum dot lasers to the forefront of silicon photonics. In this work, we designed the structures of evanescent coupled quantum dot distributed feedback lasers with asymmetric gratings, which made significant improvement in on-chip output power while maintaining single-longitudinal-mode stability. The optimal /4 phase-shift position (the ratio of the grating length from the rear-end of /4 phase-shift to the total grating length) from conventional position of 0.50 to 0.64 allows the ratio of the output power at both sides of silicon waveguide to be increased from 1.0 to 5.9. Moreover, the optimal duty cycle at one side of the phase-shift from 0.50 to 0.8 allows the ratio to be increased from 1.0 to 3.7. Meanwhile, the ratio could be dramatically improved from 1.0 to 9.2 by changed the duty cycle at one side of phase-shift to 0.7 while maintaining the phase-shift position of 0.64. With those designed structures, evanescent coupled quantum dot lasers could challenge the state-of-the-art bonded quantum well lasers and may eventually become ubiquitous and affordable for future commercial production.

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