About Tissa Gunaratne

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So far Tissa Gunaratne has created 24 blog entries.

CARS Microscopy with Spectral Focusing

With the help of spectral focusing, vibrational imaging modalities using multimodal CARS have become invaluable tools in neuroscience. Hans-Erik Swoboda and Tissa Gunaratne Multiphoton/nonlinear laser scanning microscopy has become an important tool to investigate biological phenomena, where high resolution, 3-dimensional imaging with depth resolution is essential to uncover underlying biological functions. Two-photon or multiphoton imaging is preferred to single photon imagining techniques due to several intrinsic advantages of multiphoton techniques. One of the advantages is having a nonlinear intensity dependent absorption. For example, two-photon absorption is restricted to the focal volume so there is virtually [...]

2018-02-23T21:45:40+00:00May 29, 2015|
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30T Magnetic Pulses on Tabletop —The World’s First Fiber Seeded Ti:Sap Regen Amplifier Making Headlines

Review of Scientific Instruments Abstract We have developed a mini-coil pulsed magnet system with direct optical access, ideally suited for nonlinear and ultrafast spectroscopy studies of materials in high magnetic fields up to 30 T. The apparatus consists of a small coil in a liquid nitrogen cryostat coupled with a helium flow cryostat to provide sample temperatures down to below 10 K. Direct optical access to the sample is achieved with the use of easily interchangeable windows separated by a short distance of ∼135 mm on either side of the coupled cryostats with numerical apertures [...]

2018-02-22T22:19:29+00:00Dec 1, 2013|
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Clark-MXR Inc. Receives NIH SBIR funding for the Direct-write Production of Cochlear Implant Electrode Arrays

Dexter, MI, September 14, 2011: — Clark-MXR, Inc. has been awarded a Small Business Innovation Research (SBIR) Phase II contract from the National Institute of Health to further develop the tools, facilities and protocols needed to produce multi-electrode arrays using known biocompatible materials. Building on its successful Phase I program, the company will use its unique, direct-write micromachining technology to produce a robust, high quality, reliable cochlear implant electrode array that is functionally similar to those in clinical use today. Clark-MXR anticipates that this new technology will eliminate failures caused by embrittlement as well as [...]

2018-02-22T22:19:52+00:00Sep 14, 2011|
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Femtosecond Fibre Laser for Material Processing

Originally published in German in Photonik 1/2008, this article on ultrashort pulse laser micromachining appeared in Laser (Europe)  as was written by our Director of Operations in Europe, Dr. Hans-Erik Swoboda The ultrashort pulses from femtosecond lasers allow precise material processing and thus show great potential in the field of micro- and nano-processing. In the past, however, the rather low average power and low repetition rate of these lasers have hindered many commercial applications. First results from the application laboratory demonstrate that fs-lasers based on fibre technology are promising alternatives. READ FULL ARTICLE (pdf)

2018-03-21T00:54:04+00:00Mar 16, 2008|
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