Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall

Zhai, Tianrui; Ma, Xiaojie; Han, Liang; Zhang, Shuai; Ge, Kun; Xu, Yanan; Xu, Zhiyang; Cui, Libin

doi:10.3390/nano11092381

Open AccessArticle

Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall

by

Tianrui Zhai

^*

,

Xiaojie Ma

,

Liang Han

,

Shuai Zhang

,

Kun Ge

,

Yanan Xu

,

Zhiyang Xu

and

Libin Cui

^*

Faculty of Science, College of Physics and Optoelectronics, Beijing University of Technology, Beijing 100124, China

^*

Authors to whom correspondence should be addressed.

Nanomaterials 2021, 11(9), 2381; https://doi.org/10.3390/nano11092381

Submission received: 7 August 2021 / Revised: 9 September 2021 / Accepted: 11 September 2021 / Published: 13 September 2021

(This article belongs to the Special Issue Laser Fabrication of Functional Micro/Nanomaterials)

Download

Browse Figures

Versions Notes

Abstract

This article assembles a distributed feedback (DFB) cavity on the sidewalls of the optical fiber by using very simple fabrication techniques including two-beam interference lithography and dip-coating. The DFB laser structure comprises graduated gratings on the optical fiber sidewalls which are covered with a layer of colloidal quantum dots. Directional DFB lasing is observed from the fiber facet due to the coupling effect between the grating and the optical fiber. The directional lasing from the optical fiber facet exhibits a small solid divergence angle as compared to the conventional laser. It can be attributed to the two-dimensional light confinement in the fiber waveguide. An analytical approach based on the Bragg condition and the coupled-wave theory was developed to explain the characteristics of the laser device. The intensity of the output coupled laser is tuned by the coupling coefficient, which is determined by the angle between the grating vector and the fiber axis. These results afford opportunities to integrate different DFB lasers on the same optical fiber sidewall, achieving multi-wavelength self-aligned DFB lasers for a directional emission. The proposed technique may provide an alternative to integrating DFB lasers for applications in networking, optical sensing, and power delivery.

Keywords: distributed feedback lasers; colloidal quantum dots; self-aligned emission; optical fiber; mode coupling

Share and Cite

MDPI and ACS Style

Zhai, T.; Ma, X.; Han, L.; Zhang, S.; Ge, K.; Xu, Y.; Xu, Z.; Cui, L. Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall. Nanomaterials 2021, 11, 2381. https://doi.org/10.3390/nano11092381

AMA Style

Zhai T, Ma X, Han L, Zhang S, Ge K, Xu Y, Xu Z, Cui L. Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall. Nanomaterials. 2021; 11(9):2381. https://doi.org/10.3390/nano11092381

Chicago/Turabian Style

Zhai, Tianrui, Xiaojie Ma, Liang Han, Shuai Zhang, Kun Ge, Yanan Xu, Zhiyang Xu, and Libin Cui. 2021. "Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall" Nanomaterials 11, no. 9: 2381. https://doi.org/10.3390/nano11092381

APA Style

Zhai, T., Ma, X., Han, L., Zhang, S., Ge, K., Xu, Y., Xu, Z., & Cui, L. (2021). Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall. Nanomaterials, 11(9), 2381. https://doi.org/10.3390/nano11092381

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

Self-Aligned Emission of Distributed Feedback Lasers on Optical Fiber Sidewall

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI