Photonics Research, Volume. 9, Issue 4, 558(2021)
Robust hybrid laser linewidth reduction using Si3N4-based subwavelength hole defect assisted microring reflector
Fig. 1. Schematic diagram of the proposed hybrid narrow-linewidth laser with a
Fig. 2. Schematic diagram of the proposed SHDA-MRR structure (not to scale). A subwavelength hole defect is embedded in the microring waveguide of a conventional all-pass microring resonator for generating manipulated backward scattering and inter-cavity modal coupling between CW and CCW modes.
Fig. 3. (a) Simulated transmission spectra (including reflection and through responses) of the SHDA-MRR and corresponding reflection response of an add-drop microring reflector (dashed line) for comparison. (b) Simulated reflection responses of the SHDA-MRR with different
Fig. 4. Optical microscope image of the fabricated
Fig. 5. (a) Measured (dots) and fitted [dashed lines, by Eqs. (
Fig. 6. (a) Schematic diagram of the experimental setup. A
Fig. 7. Calculated linewidth reduction factor
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Jiachen Li, Baoyu Zhang, Sigang Yang, Hongwei Chen, Minghua Chen, "Robust hybrid laser linewidth reduction using Si3N4-based subwavelength hole defect assisted microring reflector," Photonics Res. 9, 558 (2021)
Category: Integrated Optics
Received: Oct. 12, 2020
Accepted: Feb. 7, 2021
Published Online: Apr. 6, 2021
The Author Email: Minghua Chen (chenmh@tsinghua.edu.cn)