Technology field / OU or Centre
Lasers/ CSIR National Laser Centre
Diffractive optical elements (DOEs) are thin phase elements that operate by means of interference and diffraction to produce arbitrary distributions of light or to aid in the design of optical systems.
The power output of a laser can be increased by as much as 250% using special diffractive optical elements (DOEs) at very little additional cost to the laser manufacturer and without disrupting or changing the manufacturing process.
The invention lies in a new concept of how to design laser resonators. The concept is to change the shape of a laser beam inside the cavity such that it has high energy extracting properties at the gain side (flat-top beam), and good propagation properties at the output side (Gaussian beam).
The technology offers laser manufacturers several benefits without any significant alterations to their existing designs and manufacturing processes and at a fraction of their current manufacturing costs: ,
Gaussian beam output
- Better gain extraction (up to 250%)
- High beam quality (M2 ~ 1)
- Less thermal aberrations
- No disruption or change to the manufacturing process
These improvements allow laser end users to purchase lasers that are either much lower in cost or smaller in dimensions, thereby allowing them to access new applications or re-address existing applications that have been inaccessible due to cost or dimensional restrictions.
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