Successive phase change and stability of near-field patterns for broad-area laser diodes

Tsunenori Asatsuma; Yoshiro Takiguchi; Sebastien Frederico; Akio Furukawa; Shoji Hirata

doi:10.1117/12.644470

15 February 2006 Successive phase change and stability of near-field patterns for broad-area laser diodes

Tsunenori Asatsuma, Yoshiro Takiguchi, Sebastien Frederico, Akio Furukawa, Shoji Hirata

Proceedings Volume 6104, High-Power Diode Laser Technology and Applications IV; 61040C (2006) https://doi.org/10.1117/12.644470
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

For the application of broad-area laser diodes (BA-LDs) to display or printing, uniform distribution and stability of their near-field pattern (NFP) are the most important demand. In order to control the NFP, we have fabricated BA-LDs with index-guided structure and got better top-hat and stabler NFP than that for gain-guided BA-LDs. However, this mechanism is not understood yet. Therefore, we study the features of BA-LDs' NFP systematically, and set up a new model to understand their behaviors. The NFPs of BA-LDs evolve via three phases with increasing operation current: the first phase is "mode-progressing phase" in which the number of the spatial modes increases orderly, and the second phase is "transition phase" in which the spatial modes become unstable and fluctuate. The third phase has different properties according to the waveguiding structure of BA-LDs: "disordered phase" appears for gain-guided structure in which several specific modes dominate in the whole distribution (filamentation behavior), on the other hand "ordered phase" appears in the case of index-guided structure in which a top-hat distribution is obtained. This top-hat NFP is almost unchanged with increasing output power. With these experimental results, we propose the new model, in which the emitting area of a BA-LD is divided into several parts and they are discussed separately.

Citation Download Citation

Tsunenori Asatsuma, Yoshiro Takiguchi, Sebastien Frederico, Akio Furukawa, and Shoji Hirata "Successive phase change and stability of near-field patterns for broad-area laser diodes", Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 61040C (15 February 2006); https://doi.org/10.1117/12.644470

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