Bozhang Dong, Jianan Duan, Heming Huang, Justin C. Norman, Kenichi Nishi, Keizo Takemasa, Mitsuru Sugawara, John E. Bowers, Frédéric Grillot. Dynamic performance and reflection sensitivity of quantum dot distributed feedback lasers with large optical mismatch[J]. Photonics Research, 2021, 9(8): 1550
- Photonics Research
- Vol. 9, Issue 8, 1550 (2021)
Fig. 1. (a) Light-current characteristics with temperature ranging from 15°C to 55°C. (b) Threshold current (burgundy) and external efficiency (jade) as a function of temperature.
Fig. 2. Optical spectra of the QD DFB laser from 15°C to 55°C (2 × I th
Fig. 3. Temperature-dependent (a) DFB wavelength (burgundy), optical gain peak (jade), (b) optical wavelength detuning (gray), and side-mode suppression ratio (emerald).
Fig. 4. (a) Measured RIN spectra at several bias currents at 20°C. (b) Extracted damping factor γ f RO 2 K T m
Fig. 5. (a) Optical spectra around the DFB mode and the modulation sidebands of the DFB laser operating at 2 × I th α T m
Fig. 6. Experimental setup used for the long-delay coherent external optical feedback measurement. ISO, optical isolator; PD, photodiode; PC, polarization controller; VOA, variable optical attenuator.
Fig. 7. RF spectra and optical spectra in different r ext 2 × I th 6 × I th r ext 2 × I th 6 × I th
Fig. 8. (a), (b) RF spectra and optical spectra in different r ext 6 × I th r ext
Fig. 9. Critical feedback level r crit T m
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Table 1. Modulation Dynamic Performance between InAs QD Lasers Grown on GaAs and on Si Substrate at Room Temperature
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