650nm red VCSELs with improved temperature performance

Amirhossein Ghods; Matthew Dummer; Klein Johnson

doi:10.1117/12.2650265

15 March 2023 650nm red VCSELs with improved temperature performance

Amirhossein Ghods, Matthew Dummer, Klein Johnson

Proceedings Volume 12439, Vertical-Cavity Surface-Emitting Lasers XXVII; 124390F (2023) https://doi.org/10.1117/12.2650265
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

In this paper, we report on design optimization, design, and fabrication of single-junction red VCSELs emitting at the wavelength of ~650nm with improved power and temperature performance. This has been achieved through redesigning the VCSEL epitaxial structure by optimizing the number of top and bottom mirror pairs to reduce the optical losses, optimizing p-DBRs’ doping concentration levels, changing the oxide layer thickness and position relative to the active region, and adjusting the wavelength detuning between peak wavelength of the gain medium and the Fabry-Perot dip wavelength. Moreover, several changes have been implemented to improve the carrier confinement in the active region to improve the performance of these devices at higher temperatures. These include optimizing the net strain across the active region, modifying the electron blocking layers, and also optimizing the number and thickness of InGaP-based multiple quantum wells. The CW characterization results indicate a record-high output optical power of 4.25mW at room temperature for a 14μm VCSEL. The temperature-variable L-I-V characterization results indicate a maximum lasing temperature of 50°C for the 14μm VCSEL, while the 5μm device has shown to be lasing up to 80°C. All devices have shown to be highly multi-mode spectrally, but with different far-field beam profiles. Moreover, the results indicate that the output light from these devices are strongly polarized in the <011> direction. Overall, the results depict a promising roadmap into developing high brightness red VCSELs which have superior performance over a broad temperature range

Conference Presentation

Citation Download Citation

Amirhossein Ghods, Matthew Dummer, and Klein Johnson "650nm red VCSELs with improved temperature performance", Proc. SPIE 12439, Vertical-Cavity Surface-Emitting Lasers XXVII, 124390F (15 March 2023); https://doi.org/10.1117/12.2650265

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