Performance of a Holographic Supernotch Filter

Author:

Schoen Christian L.1,Sharma Shiv K.1,Helsley Charles E.1,Owen Harry1

Affiliation:

1. Hawaii Institute of Geophysics, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, 2525 Correa Rd., Honolulu, Hawaii 96822 (C.L.S., S.K.S., C.E.H.); and Kaiser Optical Systems, Inc., 371 Parkland Plaza, Ann Arbor, Michigan 48106 (H.O.)

Abstract

Results are presented of a comparative evaluation of a holographic supernotch filter (HSNF) and a holographic notch filter (HNF) as a Rayleigh line rejection filter for Raman spectroscopy. The filter permits acquisition of both Stokes and anti-Stokes spectra down to ±200 cm−1 shift from excitation simultaneously, without filter angle adjustment. With slight angle adjustment, spectra can be recorded as close as 41 cm−1 from the excitation line. Performance of the HSNF is evaluated by measuring the low-frequency Raman spectra of Tb2(MoO4)3, water, and naphthalene.

Publisher

SAGE Publications

Subject

Spectroscopy,Instrumentation

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