New technology for generating smoother laser images could be used to control the quality of polymer packaging and printed electronics, and for biomedical imaging.

Laser light is synchronized in time and space to produce a very bright, sharp, coherent beam, making it ideal for accurate imaging and measuring devices.

But a coherent, sharp laser beam reflecting from even a slightly uneven surface accentuates irregularities. This distortion complicates the process of reading biomedical imaging done in the infrared spectrum.

Now, a Singapore research team led by Ying Zhang is generating smoother laser images by etching nanoholes in semiconductor lasers to randomize parts of the mid-infrared spectrum without reducing brightness.

Images produced by the electrically pumped mid-infrared random laser are very bright like those of a conventional laser. But the altered, slightly softer focus it produces in certain wavelengths produces a better, more easily read image.

Team member Dr Hou Kun Liang says that before random lasers can be brought to market, the team wants to build a version that operates at room temperature and adds more random wavelengths.



For further information contact:
Dr Hou Kun Liang
Singapore Institute of Manufacturing Technology
Agency for Science, Technology and Research