Performance enhancement of distributed feedback laser with a partial grating

Wei Xu; Wei Hong; Haotian Shi; Junqiang Sun

doi:10.1117/12.2664345

27 December 2022 Performance enhancement of distributed feedback laser with a partial grating

Wei Xu, Wei Hong, Haotian Shi, Junqiang Sun

Proceedings Volume 12311, Semiconductor Lasers and Applications XII; 123110G (2022) https://doi.org/10.1117/12.2664345
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

Distributed feedback (DFB) lasers that are widely used in high-speed communication nowadays usually use end-facet coating in order to seek a balance between fabrication difficulty and device performance. This paper investigates DFB lasers with a partial grating structure that is immune to the phase uncertainties at the end-facet with high-reflection (HR) film and the improvement of its output chirp characteristics. It is found that, after parameter optimization, the carrier concentration and photon density distribution along the partial grating DFB(PG-DFB) laser cavity can be more uniform, which helps to obtain a better production yield. In addition, a compromised choice of the length of grating region and non-grating region can ensure stable single-mode output, as well as sub-10 mA threshold and high slope efficiency (SE). We also find that the PG-DFB laser can reduce the transient chirp by about 5 GHz compared to conventional DFB laser with uniform grating.

Conference Presentation

Citation Download Citation

Wei Xu, Wei Hong, Haotian Shi, and Junqiang Sun "Performance enhancement of distributed feedback laser with a partial grating", Proc. SPIE 12311, Semiconductor Lasers and Applications XII, 123110G (27 December 2022); https://doi.org/10.1117/12.2664345

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available