## Analysis of Relative Intensity Noise Spectra for Uniformly and Chirpily Stacked InAs–InGaAs–GaAs Quantum Dot Lasers

Journal of Lightwave Technology, Vol. 30, Issue 3, pp. 331-336 (2012)

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### Abstract

The dynamic properties of uniformly and chirpily stacked InAs–InGaAs–GaAs quantum dot lasers are analyzed in terms of relative intensity noise spectra. For uniformly stacked quantum dot laser with ground-state lasing emissions of 1.3 μm, the <i>K</i>-factor limited bandwidth is 13 GHz. The extracted differential gain and gain compression factor are 1.7 × 10<sup>-15</sup> cm<sup>2</sup> and 2 × 10<sup>-16</sup> cm<sup>3</sup>, respectively. For chirpily stacked quantum dot laser with excited-state lasing emissions of 1.2 μm, the <i>K</i>-factor limited bandwidth is 14 GHz. Yet the nonproportional dependence between resonance frequency and square root of incremental current yields differential gain of 4.3 × 10<sup>-15</sup> cm<sup>2</sup> and huge gain compression factor of 1.4 × 10<sup>-14</sup> cm<sup>3</sup>.

© 2011 IEEE

**Citation**

Gray Lin, Hao-Ling Tang, Hsu-Chieh Cheng, and Hung-Lin Chen, "Analysis of Relative Intensity Noise Spectra for Uniformly and Chirpily Stacked
InAs–InGaAs–GaAs Quantum Dot Lasers," J. Lightwave Technol. **30**, 331-336 (2012)

http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-30-3-331

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