Title

High Efficiency Surface-Emitting Laser With Subwavelength Antireflection Structure

Keywords

Grating coupler; Subwavelength structure; Surface-emitting semiconductor laser

Abstract

We report on a high efficiency tapered grating surface-emitting laser with an antireflection-structured (ARS) substrate. A 64% improvement of the device efficiency is obtained by monolithic integration of a sawtooth-shaped ARS on the GaAs substrate. Slope efficiencies of 0.82 W/ A were measured at 975 nm in pulse pumping and are mainly limited by free-carrier absorption in the n-doped GaAs substrate. A maximum peak power of 25 W was obtained without coating the device's cleaved facet. The symmetry of the near-field intensity profile along the grating coupler is improved by varying the grating duty cycle from 20% to 55%. © 2005 IEEE.

Publication Date

4-1-2005

Publication Title

IEEE Photonics Technology Letters

Volume

17

Issue

4

Number of Pages

732-734

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/LPT.2004.843259

Socpus ID

17644383700 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/17644383700

This document is currently not available here.

Share

COinS