Alignment Tolerant Couplers for Silicon Photonics
| Autor: | Florian Merget, Bahareh Marzban, Bin Shen, Sebastian Romero-García, Jeremy Witzens |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Silicon photonics
Optical fiber Materials science Hybrid silicon laser business.industry Physics::Optics Silicon on insulator Laser Atomic and Molecular Physics and Optics law.invention Interferometry Optics law Insertion loss Optoelectronics Electrical and Electronic Engineering business Diffraction grating |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 21:765-778 |
| ISSN: | 1558-4542 1077-260X |
| Popis: | Laser integration, optical coupling, and assembly are challenging problems that need to be further addressed to reduce the manufacturing costs of silicon photonic-based products. In this paper, we propose novel coupling devices that facilitate the passive assembly of silicon photonics chips with laser diodes and optical fibers by means of pick-and-place tools by relaxing the stringent alignment tolerances required for maintaining a high coupling efficiency. In these devices, a lateral misalignment of the laser or fiber relative to the chip is accommodated by a varying phase difference between two on-chip single-mode SOI waveguides to which the light is coupled with minimal insertion loss penalty and a balanced power splitting. This device concept is successfully applied to the fabrication of in-plane laser couplers based on inverse taper arrays and out-of-plane fiber couplers with diffraction gratings. Furthermore, we experimentally demonstrate the suitability of the proposed devices for fiber array assembly in Mach–Zehnder interferometer configuration. The best devices exhibit a three-fold improvement relative to the lateral alignment tolerances of conventional couplers. |
| Databáze: | OpenAIRE |
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