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February 01, 2008  

Semrock Adds Unique Second Harmonic Generation Dichroic to its Family of Nonlinear Microscopy Filters


multiphoton filter for second harmonic generationROCHESTER, N.Y. – Semrock, Inc., announces an important addition to its BrightLine® optical filters for multiphoton biological imaging with a unique filter optimized for Second Harmonic Generation (SHG) microscopy. This state-of-the-art short-wave-pass dichroic beamsplitter is ideal for SHG imaging as well as multiphoton fluorescence imaging using a femtosecond near-infrared laser.

The new high performance filter has extremely low group delay dispersion for minimized pulse broadening to allow deep sample penetration – a 100 fs laser pulse broadens by much less than 1% after reflection off the filter. And with its carefully controlled polarization dependence, it maintains a very high degree of linear polarization for both reflected laser light and transmitted signal light for all polarization orientations.

"The ability to control polarization in Second Harmonic Generation imaging impacts an exciting new frontier in the study of thick tissue samples," said Dr. Turan Erdogan, CTO of Semrock. "This new dichroic beamsplitter allows the investigator to vary the polarization state of the laser while measuring a like-polarized signal beam for the utmost in signal-to-noise ratio. Our design team, responding to customer demand, overcame formidable obstacles in order to simultaneously provide high transmission over a wide bandwidth, with sharp transitions, low dispersion and excellent polarization control – properties not found in traditional dichroic beamsplitters."

Semrock's multiphoton optical filters are in stock for quick delivery. And all of Semrock's filters are made with state-of-the-art Ion Beam Sputtering, for dense, hard dielectric optical coatings with high laser damage threshold, low temperature sensitivity, and permanent performance. Semrock offers an industry-leading five year warranty on all of its filter products. Visit www.semrock.com for more details.

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About Semrock:
Semrock manufactures quality optical filters that set the standard in performance and reliability for the biotech and analytical instrumentation markets. All Semrock optical filters are made with hard Ion Beam Sputtered optical coatings. OEM filters are manufactured in volume. End-users benefit from a wide selection of standard catalog products that ship from stock. Semrock's patented and patent-pending products include the highly acclaimed BrightLine series of fluorescence filters for research and clinical microscopy, high-throughput screening, real-time PCR, and other fluorescence-based instrumentation; state-of-the-art filters for Raman spectroscopy; and other unique laser analytical instrumentation filters. Semrock's innovative products, made possible by combining modern ion-beam sputtering with Semrock's proprietary volume manufacturing technology, are covered under an industry-leading five-year warranty.

Founded in September 2000, Semrock is based in Rochester, New York, a well-known center of optics, and has sales offices throughout the United States. For additional information about Semrock, its products, and its team of international distributors, visit the company website at www.semrock.com.

BrightLine and Semrock are registered trademarks of Semrock, Inc.
Contact: Amanda MacDonald
amacdonald@semrock.com
585-594-7000