Chevron-Type Dielectric Filter Set for Efficient Narrow-Band Laser Line Rejection in Raman Microspectrometers

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Abstract:

A chevron-type dielectric bandpass filter set is described which combines laser line rejection by a factor > 108 with a high throughput of Raman scattered light (70%). The rejection bandwidth is 60 cm-1 full width at half-maximum. Stokes and anti-Stokes Raman spectra can be recorded simultaneously from approximately 20 cm-1 from the laser line. The filter set, moreover, takes care of efficient coupling of microscope and spectrometer, replacing an otherwise necessary beamsplitter.

Keywords: Anti-Stokes; Chevron-type dielectric filter; Stokes

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702944028056

Affiliations: Department of Applied Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands

Publication date: November 1, 1994

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