Related Experiment Video
Updated: Jul 9, 2026
06:16
Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
Published on: April 25, 2019
Light flowers from coherent vertical-cavity surface-emitting laser arrays
Optics Letters
|November 23, 2007
Summary
Symmetric flower-shaped light patterns were emitted from semiconductor laser arrays. These unique patterns maintain their shape during free-space propagation, explained by thermal lensing and array loss patterns.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
- Materials Science
Background:
- Vertical-cavity semiconductor lasers (VCSELs) are crucial for various optical applications.
- Controlling and shaping laser emission patterns is an active area of research.
- Array configurations offer potential for novel beam characteristics.
Purpose of the Study:
- To report the emission of novel symmetric flower-shaped light patterns.
- To investigate the underlying physical mechanisms responsible for these patterns.
- To validate the findings with a theoretical model.
Main Methods:
- Utilizing coherently locked hexagonal vertical-cavity semiconductor laser arrays.
- Analyzing the characteristics of the emitted light patterns.
- Developing and applying a theoretical model for strongly coupled arrays.
Main Results:
- Observed emission of symmetric, flower-shaped light patterns.
- Demonstrated preservation of pattern shape during free-space propagation.
- Attributed pattern formation to combined thermal lensing and engineered loss patterns.
Conclusions:
- Coherent locking in hexagonal VCSEL arrays can generate unique, stable light distributions.
- Thermal lensing and specific loss patterns are key to forming these flower-shaped emissions.
- The theoretical model accurately predicts the observed experimental results.
More Related Videos
Related Concept Videos
01:16Confocal Fluorescence Microscopy
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
01:14Photoluminescence: Applications
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...