Event calendar file
Department of Nuclear and Atomic Physics Seminars
Ultrafast Laser Inscription – Science Today Technology Tomorrow
by Prof. Ajay Kumar Kar (Physics Department, Heriot Watt University,Edinburgh)
Monday, December 12, 2011
from
to
(Asia/Kolkata)
at Colaba Campus ( AG80 )
at Colaba Campus ( AG80 )
| Description |
Focussed Ultrashort laser pulses can modify the local refractive index of certain materials, significant research has been expended into using ultrafast lasers to fabricate integrated optical devices. Integrated optical waveguides – the optical analogue of wires – can be simply fabricated by translating the sample in the path of such short optical pulse trains, which effectively amounts to writing the desired optical circuit in a controlled way in that sample. This direct-write approach offers several key benefits over conventional fabrication techniques. It neither requires use of expensive clean room facilities, nor involves complex film deposition and subsequent etching processes. This technology can also yield 3D structures, unachievable through conventional techniques. In my talk I will present how the ultrafast laser inscription technology can be used to develop components like switches, splitters/combiners, amplifiers, etc. I will also describe how to exploit new materials (laser and highly nonlinear materials) such that several all-optical devices could be monolithically integrated on the same substrate in the form of optical integrated circuits. |
