Feedback suppression in 405 nm superluminescent diodes via engineered scattering
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866910904510054400 |
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| author | Pacheco, Andrea Martinez Consoli, Antonio Lopez, Cefe |
| author_facet | Pacheco, Andrea Martinez Consoli, Antonio Lopez, Cefe |
| contents | Superluminescent diodes are promising devices for applications in which low coherence, high efficiency, small foot-print and good optoelectronic integration are required. Blue emitting superluminescent diodes with good performances and easy fabrication process are sought for next generation solid state lighting devices, micro-projectors and displays. These devices are laser diodes in which the optical feedback is inhibited, and lasing action avoided. Conventional fabrication processes minimize optical feedback by ad-hoc designs, e.g. anti-reflection coating, tilted waveguide or absorber sections, requiring specific fabrication steps. In this work, we propose and demonstrate the introduction of scattering defects in the device waveguide as a method for feedback inhibition. By performing pulsed laser ablation on a commercial 405 nm GaN laser diode we demonstrate a superluminescent diode, featuring a maximum output power of 2 mW and a spectral width of 5.7 nm. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_04272 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Feedback suppression in 405 nm superluminescent diodes via engineered scattering Pacheco, Andrea Martinez Consoli, Antonio Lopez, Cefe Optics Superluminescent diodes are promising devices for applications in which low coherence, high efficiency, small foot-print and good optoelectronic integration are required. Blue emitting superluminescent diodes with good performances and easy fabrication process are sought for next generation solid state lighting devices, micro-projectors and displays. These devices are laser diodes in which the optical feedback is inhibited, and lasing action avoided. Conventional fabrication processes minimize optical feedback by ad-hoc designs, e.g. anti-reflection coating, tilted waveguide or absorber sections, requiring specific fabrication steps. In this work, we propose and demonstrate the introduction of scattering defects in the device waveguide as a method for feedback inhibition. By performing pulsed laser ablation on a commercial 405 nm GaN laser diode we demonstrate a superluminescent diode, featuring a maximum output power of 2 mW and a spectral width of 5.7 nm. |
| title | Feedback suppression in 405 nm superluminescent diodes via engineered scattering |
| topic | Optics |
| url | https://arxiv.org/abs/2504.04272 |