Analysis of the emission characteristics of diode lasers by their wavefront structure

Inga-Maria Eichentopf; Martin Reufer

doi:10.1117/12.2250325

20 February 2017 Analysis of the emission characteristics of diode lasers by their wavefront structure

Inga-Maria Eichentopf, Martin Reufer

Proceedings Volume 10090, Laser Resonators, Microresonators, and Beam Control XIX; 100901O (2017) https://doi.org/10.1117/12.2250325
Event: SPIE LASE, 2017, San Francisco, California, United States

Abstract

In recent years wavefront measurements using a Shack-Hartmann Sensor became a fast and easy way to analyze the change of laser beam characteristics over a wide range of parameters. This method is well known for nearly Gaussian laser beams while the wavefront analysis of broadarea semiconductor lasers is still an open field of current research. Detailed analysis of the wavefront gives an additional path to get insight into the modal composition of semiconductor lasers, which has a dominant impact on the output parameters of the devices. For our investigations we utilize lasers based on the material system of GaAs emitting light in the near infrared. These types of laser emit typically more than one optical mode. The composition of these modal structures is highly affected by thermal and electric effects inside the active medium. By using a simulation software the intensity distribution at various diode currents can be associated with an assembly of Hermite Gaussian modes and thus gives insight into the basic modal structure. Additionally the change of modal composition can be recorded within the wavefront deflection. This delivers an extra track of information to the light emission. The aim of our research is to associate the wavefront with the modal structure gained by measuring the intensity distribution under changing working conditions. Furthermore we use a lens system to receive a magnified image of the beam and investigate the spatial evolution of the intensity and wavefront distribution of the laser emission along the propagating axis.

Citation Download Citation

Inga-Maria Eichentopf and Martin Reufer "Analysis of the emission characteristics of diode lasers by their wavefront structure", Proc. SPIE 10090, Laser Resonators, Microresonators, and Beam Control XIX, 100901O (20 February 2017); https://doi.org/10.1117/12.2250325

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Semiconductor lasers

Wavefronts

Diodes

Sensors

Transmission electron microscopy

Wavefront sensors

Light wave propagation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years