| Generation of coherent high
power UVradiations 
|
The division is also
involved in R & D of generation of coherent high
power UV radiations at multiple wavelengths, 255 nm, 271
nm and 289 nm. This is achieved by non-linear frequency
conversion of CVL radiations (510 nm and 578 nm) in
beta-BBO crystal. We have achieved the average UV power
of the order of 1 W for all UV wavelengths. This UV power
coupled with diffraction limited beam quality is
sufficient for high precision micro-machining and for
development of Fiber sensors. Some initial success has
been obtained in writing 5 microns spacing Bragg gratings
in doped optical fibers. This activity is being expanded
with setting of entire lab. in vibration free
environment. Studies on UV radiation based precision
micro-machining leading to MEMS fabrication is also being
planned. |
